development

[warm sleet]

    public static void login(Request request, Response response) {
        StringBuilder sb = new StringBuilder();
        for (String qp : request.queryParams()) {
            sb.append("&").append(qp).append("=").append(request.queryParams(qp));
        }
        if (sb.length() > 0) {
            sb.replace(0, 1, "?");
        }
        response.redirect("/login?target=" + request.pathInfo() + "&qp=" + Base64Coder.encodeString(sb.toString()));
    }

login helper ^

[hollow basalt]

yeaaa, the "after" target

[warm sleet]

yeah

it encodes any additional parameters

as base64

[hollow basalt]

"You also get all the benefits of running your application on the JVM, where libraries aren’t deprecated every day."
lol, the quote on spark website

[warm sleet]

https://i.imgur.com/zNmKATk.png

[hollow basalt]

i feel like we do have way too many js libraries

[warm sleet]

https://i.imgur.com/uVcZ6Jm.png

https://i.imgur.com/0IBegow.png

^

:D

[hollow basalt]

oh, i see your knockturn is spark

[warm sleet]

cool eh?

[hollow basalt]

[warm sleet]

@hollow basalt https://i.imgur.com/W00Aq4r.png

currently..

package com.knockturnmc.panel.mvc;

public enum RequestMethod {
    GET, POST
}

This is all it supports

for simple web stuff, this is good 'nuf

[hollow basalt]

yea, I like lightweight frameworks

and let the users do the rest

[warm sleet]

@hollow basalt I also wrote some other helper functions

like this:

    @GET
    @Path("minecraft")
    @RequiresLogin
    public ModelAndView getMinecraftServerStatus(Request request, Response response) {
        Map<String, Object> models = new HashMap<>();
        ServiceAPIClient client = session(request).getClient();
        ServerInfo info = client.getServerInfo(request.queryParams("server"));
        models.put("server", info);
        models.put("page", "Server Information");
        models.put("page_desc", info.getName());
        return new ModelAndView(models, "status/minecraft");
    }

if a method has @RequiresLogin

inside the body, you can use session(request)

and then you can do session(request).getClient()

which gives you a handle to the backend API

which has session tokens and such

I wrote this with the intention to write a minimalists' webservice

and I think, I can't get my controllers any more "compact" than this

[hollow basalt]

hmmm

with MVC, i think i don't really get the "service" thingy

[warm sleet]

        <div class="box-body">
            <dl class="dl-horizontal">
                <!-- Information -->
                <dt>Server Name</dt>
                <dd>{{ server.name}}</dd>
                <dt>Minecraft Version</dt>
                <dd>{{ server.minecraftVersion }}</dd>
                <dt>Bukkit Version</dt>
                <dd>{{ server.bukkitVersion }}</dd>
                <dt>Build ID</dt>
                <dd>{{ server.buildID }}</dd>
                <dt>Uptime</dt>
                <dd>{{formatTimeElapsed server.uptimeMinecraft }}</dd>
                <dt>Total Memory</dt>
                <dd>{{convertToMegaBytes server.maxMemoryBytes}}MB</dd>

            </dl>

[hollow basalt]

oh no

templating

[warm sleet]

@hollow basalt correction. lightweight templating

[hollow basalt]

still templating

[warm sleet]

those fields like server.minecraftVersion

https://i.imgur.com/X1clebj.png

@hollow basalt this is why I wrote a minimalists webservice

because I just needed a templating layer

@hollow basalt https://handlebarsjs.com/

[hollow basalt]

so you wrote the templating?

[warm sleet]

no

Check out that lib ^

[hollow basalt]

you used handlebars

[warm sleet]

Yep.

[hollow basalt]

i see isee

[warm sleet]

    /**
     * Compiles and returns a final HTML DOM.
     *
     * @return String value containing a HTML DOM.
     */
    @Override
    public String render(ModelAndView modelAndView) {
        if (modelAndView == null) {
            return null;
        }
        String viewName = modelAndView.getViewName();
        try {
            Template template = handlebars.compile(viewName);
            return template.apply(modelAndView.getModel());
        } catch (IOException e) {
            logger.debug("Failed to render object", e);
            throw new RuntimeException(e);
        }
    }

[hollow basalt]

i see, handlebars is available as java library?

[warm sleet]

https://github.com/jknack/handlebars.java

[hollow basalt]

great

I need a templating engine

what a good time to suggest one

[warm sleet]

@hollow basalt https://gist.github.com/CrystalMare/856632ac26714ed3e52c2659e48ebd22

Thats the "glue" code I wrote

You need only this file

@hollow basalt this class expects you to use spark though.

it implements this interface:

//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//

package spark;

public abstract class TemplateEngine {
    public TemplateEngine() {
    }

    public String render(Object object) {
        ModelAndView modelAndView = (ModelAndView)object;
        return this.render(modelAndView);
    }

    public ModelAndView modelAndView(Object model, String viewName) {
        return new ModelAndView(model, viewName);
    }

    public abstract String render(ModelAndView var1);
}

Spark has an interface to add your own template engine

[hollow basalt]

Spark has an interface to add your own template engine
I usually like libraries that are lightweight, or like simple wrapper that uses standard libraries

this is why I don't like nodejs ecosystem that much

you want a simple server?
congrats now you have a cli-coloring library

[warm sleet]

xD

tell that to my employer

I have to learn Angular

*ngFor="blaaah"

[hollow basalt]

yea, the ng ptsd

i do like react though

or vue

over angular

or the library you recommded

[warm sleet]

mithril

yeah

mithril gives you really fine grained control over the DOM

[hollow basalt]

yea, you wanna know where I used it?

[warm sleet]

Angular kinda already expects you to build a webpage

mithril gives you more freedom

[hollow basalt]

yea, different philosophies

[warm sleet]

the FormsModule in Angular is gigantic

It does a lot of stuff behind the scenes

[nocturne galleon]

I'm working on my authentication system, is this a good idea or has it some kind of breach that I didn't think of (probably, it does):

login -> client sends mail, password etc he wants to login with
  if login successful -> server responds with token and a successful login
  then: client encrypts the current ISO date with the token and sends date and hash back
  --> server stores hash and token, client stores date and token

re-login (page reload)-> client encrypts the stored date with the stored token and sends the hash
  --> server checks if the hash is matching
``` In theory, this should be secure unless somebody reads out the stored date and token, right?
maybe instead of the date, I could use the mail address or whatever login method is used

[warm sleet]

@nocturne galleon don't reinvent the wheel

https://oauth.net/2/

[nocturne galleon]

so what should I use to store a login

ok

[warm sleet]

This takes care of handling credentials and generating tokens

[hollow basalt]

use third party auth?

[warm sleet]

Tokens can then be used to identify a person, with one or more services.

@hollow basalt nah

[hollow basalt]

use facebook auth

[hollow basalt]

i do like JWT

[warm sleet]

You request a token, to make content requests with

[hollow basalt]

try using that

[warm sleet]

OAuth2 is somewhat standardized

so it will work with a wide range of libraries and tools

[hollow basalt]

JWT is popular, so libraries are everywhere

[hollow basalt]

JWT is https://tools.ietf.org/html/rfc7519

[warm sleet]

@nocturne galleon the idea is that, only the auth service ever handles user credentials

the rest of the system uses the token, to ask the OAuth provider if it is a valid token

Actual services themselves, never see the user password

[hollow basalt]

never store plain password

[warm sleet]

that too

[hollow basalt]

that is just yikes

[nocturne galleon]

of course I'd hash it

[warm sleet]

If you need to store passwords, hash them

use bcrypt.

https://i.imgur.com/tDS1Rhw.png

[nocturne galleon]

ok thank you

[warm sleet]

bcrypt just generates a single string

that includes algo, salt & hash

[hollow basalt]

use md5

[warm sleet]

@hollow basalt OUT

[hollow basalt]

so rainbow table would be fun

[warm sleet]

OUT . NOW.

[hollow basalt]

[warm sleet]

https://i.imgur.com/TH9Tqha.png

[nocturne galleon]

what does the cost part mean?

[nocturne galleon]

but the reason I wanted to use this is that for example if you login on the website, I don't want you to be able to read out your token and use it to spam the api
But I didn't realise that you could also just read out the date

dumb me

[hollow basalt]

rate limit?

[nocturne galleon]

makes sense

[hollow basalt]

basically, if you want such guards. do it in the server

there's only so much you can do in the client side

[nocturne galleon]

@warm sleet I looked more into it and the Scope stuff seems kinda unnecessary for my use, so OAuth2 would just give me an id system, basically?
Couldn't I just use "my own" ids ?

[warm sleet]

@nocturne galleon oauth can run within your own application context

its usually just a library you import

it contains an auth module, token store and token verifier

if you do not require such functionality, yeah. you could generate your own tokens

but then you have to write your own token store

expiration mechanism, etc

[nocturne galleon]

I won't use it for permissions like Discord bots for example, just for re-login

[warm sleet]

<user,password> generates a <token, expirationtime, renewaltoken>

token can be used, until it expires

you can use the renewaltoken to renew your token

token duration, you can specify yourself

20 minutes, 1 hour, 1 day, doesn't really matter for you right now

tokens have to expire, otherwise its not secure

[fathom anchor]

Has someone experience with webflow? Can you recommend it?

[proper stream]

hello

my pivpn isn't working...

idk why

anyone?

[nocturne galleon]

Maybe you could try giving a little more info, so others can help you? Also VPN, so you can also try in #networking

[safe igloo]

more details ?

[umbral saffron]

Can someone help me with this? I’m trying to make an os

It tells me the files there but doesn’t detect it when it’s ran

And apparently this is wrong too

[pliant siren]

you're trying to make an os... on something that runs in user space... and are struggling filesystem issues handled by the VM?
hmmmmmm

[umbral saffron]

Well not exactly an os, I’m trying to get an idea of how it would work by making it run in a terminal

The User folder does exist

But it’s not detected when the code is ran

[covert falcon]

if setup = 1 ... you're doing an assignment operation here, not an equality test

[umbral saffron]

So what do I do if I’m trying to check if the input was 1

@covert falcon

[covert falcon]

==

[umbral saffron]

Well I feel like an idiot

Tysm

I still have the file issue to fix

[covert falcon]

You're welcome 🙂 ... I recommend looking at an intro to python course if you're really interested. There are tons out there these days that are 100% free and really well writen

The directory you're trying to make a file in doesn't exist. The path it's looking at is relative to where the script is being run from. In PyCharm that is probably the same folder your code is in by default. So you need to create the User directory in there as well (or point it at another folder that does exist), then try to write the files.

[umbral saffron]

I have a User folder

Which is why I’m confused

[covert falcon]

It's looking inside the KazooOS folder for the User folder, because that's where the script is running from (the project root in PyCharm). You could either move the user folder inside the kazooos folder, or change the path to something like ../User/.

[umbral saffron]

So could there be a way to make python create a file for me and store text in that file?

[midnight wind]

yes

[umbral saffron]

How?

[midnight wind]

google, it's literally such a basic thing

it's built into python

googleing is part of coding

[umbral saffron]

So then this is correct, I just should’ve used w+ instead of just w

[midnight wind]

https://www.w3schools.com/python/python_file_write.asp

mode x will create a file

although mode w should create a new file if it doesn't exist

@umbral saffron the issue is that you are using a absoulute path

you want a relative path

to do a relative path to the python file, you do "./file"

https://cdn.discordapp.com/attachments/380527803604664324/841158372471734282/image0.jpg

if you want like this

I think you can do ../User/file.txt

[umbral saffron]

So I should use x?

[umbral saffron]

Ohh ok ty

[midnight wind]

no just use w

[midnight wind]

the .. basically tells it to go up a directory

[umbral saffron]

Ah

So if I’m trying to create a new .txt file under the User folder and add text to it

I’m using w+

[umbral saffron]

Right?

[midnight wind]

why

where's the docs on that

ah

https://docs.python.org/3/library/functions.html#open

[umbral saffron]

If I did open(“User/example”, “w+”) that would create a new file correct?

[umbral saffron]

Because all I want is to use a txt file to store data

[midnight wind]

if it doesn't exist

if it does, then it will create a new

idk exactly what + does

[umbral saffron]

That’s what I want

[midnight wind]

yeah but I still don't understand the point of +

the + part doesn't create a new file

[umbral saffron]

https://www.guru99.com/reading-and-writing-files-in-python.html

What I found was doing w+ creates the file

[midnight wind]

no

w does

• means "open for updating (reading and writing)"

idk what that means tho

[umbral saffron]

Well when I just did w, it said there’s no file or directory

So I assumed that meant it was trying to open an already existing file

[midnight wind]

because it can't find the User directory

ok

just do this ../User/file.txt

with w

[umbral saffron]

Ok thanks

Still the same error

Can’t find the directory

It exists though

[midnight wind]

let me try

@umbral saffron works fine for me

literally just a = open('../User/test.txt', 'w')

file structure is just

it created test.txt

[umbral saffron]

well then if I do that I can't do py as f: to add to the file

[midnight wind]

yes you can

that's just a different syntax, with async

just to double check I will do it with async syntax

@umbral saffron works just fine

something on your end is really messed up

    print(test)

[umbral saffron]

Oh that makes sense

Pythons weird on my end a lot

I could never get speech recognition to work either

[midnight wind]

just use vscode

don't need some ide

and learn cli

it's as simple as python3 ./test.py for me

idk how it's on macos

but python is python 2.x
and python3 is python 3.x
on ubuntu

[umbral saffron]

Ok thanks

[pliant siren]

Has anyone here done any dev work for AWS DeepRacer? Work just sent out an invite for us to participate in it next month, thinking about giving it a go.

[nocturne galleon]

Roughly the same

[marsh comet]

For python, I guess its okay, but for other langauges, and ide is really helpful

It saves a lot of time too

[midnight wind]

yes and no, I argue that for begginers an IDE hides a lot of the "complexity"

so for beginners it's beneficial to try without one

[marsh comet]

Yeah, it hides whats going on behind the scenes

But once you get a good grasp of how it works, its usually worth it to use one

[midnight wind]

yeah

[nocturne galleon]

so, im making a js discord bot, all the commands work besides the mute command, help

    name: 'mute',
    description: "mutes lmao",
    execute(message, args){
        const target = message.mentions.users.first();
        if(target){
            let mainRole = message.guild.roles.cache.find(role => role.name === 'Community');
            let muteRole = message.guild.roles.cache.find(role => role.name === 'muted');

            let memberTarget = message.guild.members.chache.get(taget.id);

            memberTarget.roles.remove(mainRole.id);
            memberTarget.roles.add(muteRole.id);
            message.channel.send('<@${memberTarget.user.id}> has been muted');
         } else{
            message.channel.send('Cant find that member');


        }
    }
}```

[midnight wind]

why in spoiler...

[nocturne galleon]

forgot how to codeblock

[midnight wind]

three of these `

on each end

[nocturne galleon]

there u go

[midnight wind]

did you import it

[nocturne galleon]

ping me with answers or questions pls

import it to where?

[midnight wind]

you did module.exports

that exports the object

you need to import it somewhere else

for discord.js to actually see it

[nocturne galleon]

gtg

later

[nocturne galleon]

like i do the command and nothing

btw im hosting this bot on my pc

[midnight wind]

show full code

because you need to import this object somewhere

[midnight wind]

oof

VS for js

ohh your doing it like that

use the debugger or console.log the value of client.commands

[nocturne galleon]

yea watched a vid on yt

[nocturne galleon]

sry im an idiot what does that mean

[midnight wind]

idk how to use a debugger in VS, or if it even has one

VSCode is better for this stuff

but just in line 24 you can add

console.log(client.commands)

this will log the contents of client.commands

to the terminal

[nocturne galleon]

Pls mark where that should be

[midnight wind]

line 24

in main.js

[nocturne galleon]

Ok

Ill be gone for a couple hours but thx for ur help

[nocturne galleon]

why tf do you use VS for that

lmao

[nocturne galleon]

was in the tutorial

well it was a bad tutorial then

xp

can you help me troubleshoot tho

when i do a command it does nothing

and in console it also sayss nothing

[midnight wind]

did you do what I said

add a console.log

[nocturne galleon]

yes

[midnight wind]

and post the output

[nocturne galleon]

on line 24

everything works but mute

@midnight wind

[midnight wind]

huh

oh

lol

on line 35

in main.js

[nocturne galleon]

did i fuck up?

[midnight wind]

you need to but put client.commands.get('mute').execute(message, args)

[nocturne galleon]

SHIT

thanks

imma test it brb

@midnight wind since its in its own server rn it dosent do anything

[midnight wind]

yeah, I'm making a bot too rn

[nocturne galleon]

ooh nice

u have a test server?

[midnight wind]

yeah but it's only me, it's basically custom for some space server I'm in

[nocturne galleon]

ok

nice

can you join my test server so i can see if itl mute

[midnight wind]

sure

[nocturne galleon]

since i can tmute myself

[winter spindle]

Is anyone here able to help me with an assignment involving jQuery and PHP? I have php written and I need to submit and get data using jQuery.

[rotund harness]

If you are just looking to use ajax to call a backend function, you can find info on that here: https://api.jquery.com/jquery.post/ and https://api.jquery.com/jquery.get/. Both should be pretty easy to use / understand. If you have specific questions feel free to ask them here and someone will probably help.

[mystic birch]

guys can u guys give some ideas for some beginner projects with python

[spring pond]

make a simple discord bot

good way to learn async stuff

[mystic birch]

thx

[lethal shoal]

I can join too

[nocturne galleon]

nah

[nocturne galleon]

interesting

never thought about it as a project

[warm sleet]

@midnight wind I just deleted visual studio code from my machine

Each update is ~80MB, and it gets like 3 updates/week

and microsoft's repository is so slow, it downloads @ 250KB/s

running apt upgrade takes like 5 minutes, because of visual studio code

garbage microsoft repositories

[nocturne galleon]

So what do you use now?

[warm sleet]

Get:3 http://packages.microsoft.com/repos/code stable/main amd64 code amd64 1.56.2-1620838498 [76.4 MB]
64% [3 code 3,553 kB/76.4 MB 5%]                                                     117 kB/s 10min 24s

10 minutes lol

@nocturne galleon just IDEA

[nocturne galleon]

Ah alr

[warm sleet]

@nocturne galleon this is what I hate about microsoft apps

you get 1 package

and its app + libraries + bunch of media

and if it gets updated

instead of updating just the binary (couple MB)
it updates the entire package and redownloads everything

static linking and electronjs, curse you both.

[midnight wind]

fine for me...

[hallow pilot]

Is that unique to the .deb distribution? VS Code self-updates pretty quickly on my Mac.

[warm sleet]

Its just that Microsoft's servers are slow af

[rotund harness]

I have used VS code for years now, never an issue with update speeds or updates in general :/

[warm sleet]

@rotund harness downloading it through their regular debian repositories yields ~120KB/s download

and its kinda annoying, considering it is updated like 3x per week

and each time, slowing down package installation

cus its like 80MB

[rotund harness]

Yeah I could see how that sucks, I use a mac so don't have that issue :/

[warm sleet]

@rotund harness imagine doing a brew update, and that taking 15 minutes xD

on a 250M link xD

[rotund harness]

Sucks though - I love VS code, I wish everyone enjoyed its awesomeness 😛

[warm sleet]

@rotund harness I tried using it..

Just recently, for Angular development

But I ran into issues, where IntelliSense isn't always able to fully auto-complete

[rotund harness]

Yeah we talked about it in DMs 😛

[warm sleet]

ahhh

yes

that was you

[rotund harness]

ITS ALWAYS ME

[warm sleet]

xD

week 2 at new job

[rotund harness]

I am everywhere, and no where, all at once, and never

[warm sleet]

I got so many things done already :D

Moved them over to gitea

and also set up jenkins

and today, I managed to do my first automatic deploy

[rotund harness]

Yeah I have been moving my company over to react from Razor - slow going but fun projects

[warm sleet]

Pretty cool that new Declarative Pipeline

You can just provide a Jenkinsfile along your project

and Jenkins just scans all projects and all branches

and if you push code, it picks up that Jenkinsfile and runs it

@rotund harness and then i ran into something with my co-worker

really silly, and I wasn't sure how to respond

but is there any reason not to use localStorage for things like storing auth tokens?

especially in SPAs ?

if you refresh the page, your token is gone

and they just say to me: thats what an SPA does

[rotund harness]

So the problem with storing them in localstorage is that you open yourself up to XSS attacks. Javascript can access localstorage, so putting them there isn't that secure.

I will send you an article with information about it one second let me find it.

This is not me or my article - but this has some good information on where you shouldn't store it and stuff : https://medium.com/@benjamin.botto/secure-access-token-storage-with-single-page-applications-part-1-9536b0021321

Just losing authentication when you refresh the page... is not "just what an SPA does" if that was the case, you would never be able to refresh pages without having to sign back in lol - sounds like someone didn't want to find a real solution.

[hollow basalt]

nice article

[hollow basalt]

ehhh

that architecture

[warm sleet]

@rotund harness so what do you suggest, you keep the token in memory, and store the token serverside, attached to cookie?

[rotund harness]

It really depends, there is no "100% secure meets every potential case" solution. There are risks with any solution and downsides to some (such as way over complicated)

You "can" just store it in local storage, and eat the XSS risk, depending on your architecture and how your app is designed, it may not be a realistic risk

If you do go the cookie route, just make sure to account for CSRF as thats pretty easily to exploit

[hollow basalt]

any alternatives than simply adding more components

[warm sleet]

@rotund harness they already have a broken setup

with a bunch of CORS headers forcibly added in their backend

and currently tokens not even renewed after 15 mins

to annoyance of many

[rotund harness]

Haha - then yeah based on how much you care and how much you are impacted by potential XSS, local storage can be fine

[warm sleet]

@rotund harness I am hoping to get most of the CORS stuff out the door soon

I've set up a development pipeline, and set up proxy servers for the frontend and backend bit

why they didnt have this, I really don't understand

but I guess they should be glad I am there to help them out

[severe viper]

Hi. I'm looking for someone here studying c++ I'm definitely new to the language as I can only make very basic stuff ATM but am exited and very determined to learn and do so much more down the road I want someone to pass notes with basically is what I'm saying

[nocturne galleon]

Sure i can help you with that.. even tho im not learning.. i have learnt it..
Just tell me what you want and youll be having it..
I have books on c++ that i studied and theres lots of useful notes in the internet too that i can search amd help you for...
Regards

[warm sleet]

@severe viper broaden your horizon, as a newcomer there might be better alternatives for you to learn

Rust is very promising

[honest sleet]

I updated my Random Audio Stream Player Add-on for Godot Engine, the add-on for Randomized SFX and Audio. I use it in all my games, it's open-source, MIT Licensed and I just made a video about it 😊 https://youtu.be/yyVT8TT7sMw (peertube alternative: https://tilvids.com/videos/watch/6a2759cc-cafb-4aaa-8014-ad584949066c)

[warm sleet]

@honest sleet you should upload this to some app store, under the category "Productivity"

[honest sleet]

What do you mean 😅 ?

[warm sleet]

@honest sleet ohnvm

I saw the thumbnail and thought it was a soundboard 🤣

[marsh comet]

would this be a good place to ask about virtual machines

[nocturne galleon]

#networking might be better suited

[fallen hatch]

what advice would you give to a 15 y/o that wants to start programming and doesnt know which language to start with?

[versed dust]

Python is always where everyone starts

[versed dust]

or #networking too

[nocturne galleon]

I was going to argue against you, bet then I realised TibiaAuto(bot) was in Python.

[versed dust]

What is that, I don't know

[nocturne galleon]

Noo, just my first experience with code. Then I went to the library to borrow some random "C++ for dummies " book or the likes.

[nocturne galleon]

I would start with C++ & in case you later on wants to give up on the whole thing, just switch to some child friendly language like python.

I really like Kotlin tho. It's like Java, but not bad. https://www.youtube.com/watch?v=b-Cr0EWwaTk

[hollow basalt]

Learn c++, no other way.

[nocturne galleon]

C++ is a very big language!

[ivory bear]

learn slowly from the base, you don't need to know all of C++ at once for starter

my first programming course when I went to uni was also C++

[simple patrol]

i'm nub can i get some help with java here lol

i'm trying to repeat an integer 10000 times, however i don't want to print that out

Anything i see online for repeating integers it just has a Print line statement and it physically displays it on the program

[old dragon]

wdym?

@simple patrol

[late plank]

I was thinking of using tensorflow and yolo for object detection. Any suggestions/comments?

I eventually want to run it on preferably some raspberry pi

[pliant siren]

you want to run tensorflow on a rpi? o_O

[gaunt finch]

https://i.imgur.com/ATZLWxT.gif

that's pretty neat

[late plank]

I was hoping to run some object recognition on it😂

[bold hornet]

i learned python first since thats what my uni teaches first, starting my c++ course this fall and i decided to start learning the language early

needless to say, learn c++ first

[pliant siren]

I see python as the modern VB equivalent. Holy crap it's horrible.

... and that's coming from someone who's first languages were Delphi and Clipper in the mid 90s.

[bold hornet]

python is easier in some ways, but i found that it oversimplifies a lot of programming concepts

i need to do a deep dive into a lot of the older languages that have been mostly phased out, its very interesting

[pliant siren]

Gotta be honest, literally the only reason I predominantly use Java (over C) is that Java has incredible testing tools available, great native integration with good IDEs (C has the latter, but not the test tools), and fantastic repository support of community libraries.

[midnight wind]

or just plain c

c++ is bloated

[pliant siren]

I've started using javascript/node a lot over the past few years more and holy crap there are language features that have just been made so complicated - async and promises mostly.

[midnight wind]

I primarly rn write in js

[pliant siren]

C++ is great if you're using .net, but if you're one those STL purists then bugger off and let's go back to using straight C.

[midnight wind]

async, promises, all that jazz

[pliant siren]

lambda expressions are the other thing that just makes me go why!?? This does not make code more readable!

[midnight wind]

what even are those

I never understood it

never really needed it

[pliant siren]

That's the thing - everything you can do with a lambda you can do with the previous way we wrote functional code.

[bold hornet]

i dabbled in lambda's while learning python but i didnt really pursue them

i plan on learning java at some point in university before i graduate, probably on my own time

[pliant siren]

Java is not without it's problems, and I wish it had C#/.net's threading model.

Java provides you no mechanism of knowing whether a thread was polled or timed out, you have to guess. But that's about the only fault I can find in it.

[bold hornet]

lol

that sounds fun

[pliant siren]

yeah, it make semaphores uhh... a little problematic.

That one in a million chance that actually no, we weren't complete and need to double-check.

[hallow pilot]

Are there no situations where you think lambdas are worthwhile? Even something small like dogs.findFirst(d => d.fluffiness > 5) ?

[pliant siren]

what's wrong with writing that in a traditional method - or even just passing an inline function where used in a language that supports it?

[warm sleet]

There's a big argument against lambdas in some languages

in Java for example, if you have a complicated pipeline, and you are using lambdas to run methods over a dataset with thousands of records

it might be faster writing a regular for loop, as those are better optimized

But doing filter and sort operations with streaming pipelines, is generally not a bad practice

Just know, that it produces slightly more memory pressure because it creates lot of short-lived objects

[hallow pilot]

like dogs.findFirst(function adequateFluffiness(dog: Dog):boolean{return dog.fluffiness > 5;})?

[midnight wind]

ahh

I use that a little bit

never knew it was called that

[warm sleet]

@pliant siren use a thread pool

dont start the threads yourself

Gives you far greater control over how and what the system is doing, you can use multiple pools, depending on the specific application

You can then use atomic references with the synchronized keyword, or use locks to implement some sort of static state

its bit more tricky, works best if you can completely remove the state from your threads

and just pass them as parameters

be it a value or some kind of socket server doing whatever

@hallow pilot pretty sure that C# specifically has two kinds of constructs. There are expressions which are compiled runtime, and functions, which use anonymous classes

Java doesn't have this, it has pure interface references through a proxy object that gets woven into the bytecode during compilation

so you'll see inner classes with (class) com.bar.Foo$Lambda12321#$() that contains a $ function

C#'s approach is much faster, because it is directly handled by the virtual machine

in java its basically done during compilation, which yields a larger binary and more cycles

[brisk crypt]

Anyone who knows some php who is willing to help get some little errors out of a small piece of code?

[warm sleet]

I can

[brisk crypt]

<?php
$conn=new mysqli("hostname","username","password","database");
$query=$conn->query("select * from klant;")
$result=$query->fetch_all();
foreach ($result as $value) {
?>

This is the code I received

[warm sleet]

okay

so the <?php declares the beginning of the document

[brisk crypt]

The second one makes the connection with the db

[warm sleet]

then it declares a variable and assigns a new mysql connection

yeah

so you got that far?

[brisk crypt]

Yeah

[warm sleet]

did that work

ok

so next

you create a query by running the query() function

and then you fetch the result of that query

as a rowset

and then you basically create a loop

and it loops over each record in the result

and you can then access these values by doing

$value["ColumnName"]

[brisk crypt]

Like this: "echo $value[0]"

[warm sleet]

no, you should use column names

I would advise against using SELECT *

instead do

klant.naam

or naam if you are only referencing one table

you can join tables together, and then you may have two columns with the same name, so you put the table prefix in front of it

SELECT klantid, naam, adres, email FROM klant WHERE klantid = ?;

if you leave the WHERE out, then it doesn't filter

You also, should never concatenate the sql string together

always use prepared statements

[brisk crypt]

The SELECT * is just because it's an example database with only 1 items in: naam and id

[warm sleet]

yeah

but for readability

just use the names

[brisk crypt]

ah fair enough

[warm sleet]

if say, in the future, you add more columns to your tables

then all of this gets messed up

[brisk crypt]

When I run the whole script trough a php codechecker I get an error on line 17

saying: "'$result' (T_VARIABLE) in your code on line 17
$result=$query->fetch_all();"

[warm sleet]

oh yeah you need to provide a mode

put this in: MYSQLI_ASSOC

[brisk crypt]

after the fetch all right?

[warm sleet]

no that's a parameter of fetch_all

it goes inbetween the ()

[brisk crypt]

yeah inbetween the () after the fetch_all

[warm sleet]

functionname(parameter1, parameter2) etc

but that's some constant

idk, php is garbage in my opinion

I've used for a while and i hate it

Only to maintain existing programs and fix bugs

but new software I wouldn't write in it

much better tools exist these days

[brisk crypt]

Hmm, even when I placed the MYSQLI_ASSOC I still get the error

ah forgot a ;

[next igloo]

I need some help with Javascript

Currently, my program calculates all the render passes, but will only display the final pass

let canvas = document.getElementById("canvas");
  var ctx = canvas.getContext("2d");
  let imageData = new ImageData(canvas.width, canvas.height);

  for (var pass = 32; pass >= 1; pass = pass / 2) {
    ctx.putImageData(imageData, 0, 0);

    //render
   
}``` Here is the simplified version of the code

and this is what I want to achieve, but the code currently only shows Pass 6

[old dragon]

oh, i "know" you, lol

[hallow pilot]

can you put a full runnable version on a fiddle?

[next igloo]

me?

[marsh comet]

I believe so

[hallow pilot]

Yes, the Mandelbrot thing. I can't tell from the little code sample what it's doing and what it's supposed to do.

[next igloo]

https://jsfiddle.net/ZERICO2005/u9gq0Lkw/1/

I use Var at the top, using Let breaks some of the code

[hallow pilot]

Okay, so you'd like to animate slowly getting sharper

[next igloo]

basically

rendering the lower resolution passes first so you can see what you are looking at

left is what i want it to do, right it what it does

[hallow pilot]

I think you need some kind of sleep in there, to get off the main thread and let the browser draw. Then ~200ms later or whatever you start the next pass

[next igloo]

k i will try that

[hallow pilot]

https://jsfiddle.net/L5p3dh68/

lmk if that makes sense

[next igloo]

thanks, that is exactly what i needed

[warm sleet]

https://www.reddit.com/r/DataHoarder/comments/nc27fv/rescue_mission_for_scihub_and_open_science_we_are/

[honest sleet]

After making a room generation algorithm (that I'll talk about in a video on my youtube channel https://www.youtube.com/c/TimKrief/ at the end of the month), I now generate 3D elements, walls flooring, doors etc. on the go to create this endless virtual gallery... Only thing missing now is the artworks! This is a refactoring of an old project https://twitter.com/TimKrief/status/1203507386323030018 and I'm so glad that I'm on my way to get it done. I'm also working on a 2D top down endless runner game that is going to use this basis.

[warm sleet]

https://www.youtube.com/watch?v=1QKktMk33QE

Pretty cool concept ^

[royal agate]

Hey guys i have a question about c++, i currently store instances of classes in a vector like this Entity *ca= new class player(x,y) playerlist.push_back(ca); x and y are random values, how do i check whether there is already a player at the given xy values so i dont have two players in the same place? or how do i scan the vector for certain xy values? Im new to c++ so i'd be thankful for help.

[hallow pilot]

are those integers?

A few thoughts:

• there are certainly ways you could scan through that list and find pairs of players that are too close to each other
• with the right data structure you could find them more efficiently
• also maybe consider not letting it happen in the first place. (e.g. do a check when updating positions, and reject updates that move a player too close to another) (instead of checking all the players against each other once per tick or whenever)

[royal agate]

Yeah im storing everything in classes with x,y integers. Im actually trying to prohibit a movement that goes to the same x,y value but i cant find the syntax to get those x,y values from a class without just printing the whole vector out

[solemn zinc]

Maybe combine it with https://thisartworkdoesnotexist.com/ 😋

[solemn zinc]

And on a related note https://thispersondoesnotexist.com/

Both generate images using AI

[woeful kelp]

If the objects in the vector are pointers you can just check whether or not the “player” at that position is nullptr, with nullptr meaning that that spot is empty

[woeful kelp]

A better way to store them would be to use a 2D vector, or a vector of vectors. Kind of like a 2D array. Otherwise it might be worth creating your own data structure that can handle informal x,y points and to ensure that it’s sorted properly so that you can use a binary search for a faster run time. Feel free to DM me if you have any questions about it

[royal agate]

Ahh ok thanks

[woeful kelp]

I’m actually starting my fourth year in my software development degree and I also tutor for my CS department so yeah, just DM me and I’d be happy to help out

[pliant siren]

@woeful kelp Do they teach AVL trees in your current curriculum?
Had a need for one backed by an array a few weeks ago and found there were surprisingly little literature out there about them, or example implementations, and it just seemed like they were black magic to the people who wrote posts on them - which led me to believe they're no longer something they actually teach in degrees.

[woeful kelp]

Yes they do

They should in all data structure curricula

[woeful kelp]

Although the one's I've seen and learned are node-edge based, not array based

[pliant siren]

array based are pretty advanced, I might expect a course to touch on array-based b-trees but the concept is the same.

[woeful kelp]

Hmm. I haven't personally gone through many b-trees but an array based implementation doesn't seem too hard if it's based on something like a heap

[pliant siren]

it's just a lot of swapping entries.

well, that and shifting.

[woeful kelp]

Yeah, that's the trade off I can see, but doing it by nodes and edges would probably be more efficient

Since you don't have to work with dynamic arrays

[pliant siren]

yeah - just that you need much much more memory when you give the nodes address references.

[woeful kelp]

Because all an AVL tree is, is an optimized binary tree so that each branch is of equal height

Not neccessaryily

I mean sure you have random access but in terms of adding and removing you suffer a Big-O of nlog(n) since you have to copy all of the old values into a new array

And you can store every node in a completely different part of memory, whereas in arrays, they need to be in consecutive addresses

And from what I'm reading, storing it in an array would require you to have a spot for every element even if it's empty. So your space complexity would turn out to be 2^h elements where h is the max height of the tree

[honest sleet]

Could be interesting

[formal linden]

hmm https://i.gyazo.com/3d36ac54a2e00c024a3c120904c7732d.mp4

[pliant siren]

Size of an AVL tree can simply be n because it's auto-balancing.

[woeful kelp]

Sure, but you still need spaces in the array for null elements

[pliant siren]

those are just the values you haven't added yet.

[woeful kelp]

Yes but they need locations in the array

[pliant siren]

oh I think I know what you're getting at, where you have a dataset of indeterminate size.

yeah, in my use-case I had a known number of elements.

[woeful kelp]

Yeah, in that case it wouldn't be as bad

[pliant siren]

basically I was (am) using this for crypto, where you hash 0-2^k where k = 32+ - so you have an avltree of size 2^32 entries.

instead of storing the output hash (76 bytes), you store n

so you have an array of about 16GiB.

[woeful kelp]

Are you sure that's right?

[pliant siren]

yes.

[woeful kelp]

because 2^32 is 4294967296

Oh wait

[pliant siren]

yeah. 4G values at 4 bytes each.

[woeful kelp]

Never mind that

[pliant siren]

if you go to k33, k34 then you start getting biggers and you have to use a really complicated packed array to save size, you dont want to use a whole byte just for that one extra bit. OR, do it in two trees using the most significant bit.

[woeful kelp]

Right

[pliant siren]

so you can steal some performance improvements by dividing the data set so you end up with say... 2^16 AVL trees of size 2^16 instead of one a AVL tree of 2^32.

[woeful kelp]

Right

I will say I'm not a cryptography major so I wouldn't really know too much about that but it does make sense if you know you're going to have a dense tree

[pliant siren]

don't need to know anything about crypto for this, it's all just data structures.

but yeah, it's not a data structure you come across commonly so trying to find an implementation of it the other week was like "... where are they all?" and then "but they all use objects and there's no array backed implementations", so I ended up with "screw this, I'll do it myself" 😄

[woeful kelp]

Right

And that's honestly the best way to do it

When you can't find a standard implementation just make it yourself

[pliant siren]

Yeah, and I guess that's where this conversation began - it just looked like "do they even teach this stuff anymore?" because of all the posts I was finding where people just... didn't get it.

But yes, to be fair it's not exactly a data structure people are going to use very often - which explains why there aren't implementations everywhere.

[woeful kelp]

Right. But the thing to remember is that there's a difference between the data structure and it's implementation. Because the data structure is the basic algorithms and properties of an object, whereas the implementation is more developer specific

So they teach the data structure for sure, but not really that implementation

[pliant siren]

some of the assignments/projects we had back when I was in uni were competitive type ones where either your grade was based on performance across the whole class, or they were competitive programs (eg, they had to play against each other). Short version: There are about 4 people I did my course with who I could recommend hiring.

[woeful kelp]

Interesting

I'm not sure how I feel about that style of grading

[pliant siren]

okay, meeting time 😦

[woeful kelp]

GL!

[pliant siren]

holy crap, we got a stand-up done in 10 minutes.

The support team lead in my team doesn't get that stand-ups are not for two-way conversation so they always drag way out.

[woeful kelp]

Dang

Although that's the reason why you have them standing up lol

[pliant siren]

Yeah the problem is what's happened is that now we have some people on zoom, or have some of us in a meeting room with others calling in, so the stand-up becomes a sit-down, ugh 😦

[woeful kelp]

Yeah, that's rough

[honest sleet]

That's it the drone is ready! I'll have a complete showcase video out tomorrow on my channel 😉 But here's a little preview in the meantime! It's really close to what controlling a real drone feels like!

I had a hard time with the stabilization part but it ended up working ! I had to actually simulate the 4 propellers

[midnight wind]

just click the py file?

what do you want to do

use batch

window's native scripting system

you click it

it runs

https://stackoverflow.com/questions/51054/batch-file-to-delete-files-older-than-n-days

what does it do

just deletes file?

older than a certain time

oh

[spring pond]

if you want to turn it into a "native" executable you could make the batch script run the python command

[hallow pilot]

surely a modern python interpreter on windows can be made to execute files on double-click

[honest sleet]

So as I said earlier I made a brand new drone that is directly controlled from the main character's smartphone! This time around the drone is realistic and close to usual drone designs. Even the physics are close to the real thing. Plus, I made a new environment to showcase it 🙂 https://youtu.be/3_rGzksrMsI

[craggy acorn]

is there a good place to learn c++? i found learncpp.com after a few minutes of searching but i wanted to know if theres a better place. im willing to pay for a course

[hallow pilot]

looking mainly online? if you're serious about it, I'd look at any nearby colleges or universities

ooh, there's an open courseware https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-096-introduction-to-c-january-iap-2011/

[wild delta]

Yo what programming languages are used for what?

[midnight wind]

Everything

[wild delta]

.___.

wut

[midnight wind]

That's a very general answer with everyone having their own options

Its more of categories

C/cpp/rust are good for compiled things and embedded programming

Js is used on web frontend and can be used for backend through node or deno

You have c# which idk much about

Java

[gusty pawn]

you can use java to make an algorithm to solve a problem

or calculate smt

[hollow basalt]

algorithms are language agnostic

[midnight wind]

Any language can do that lol

[gusty pawn]

i was going to send an example in java but i can't find it

🥲

[midnight wind]

Java is apparently good for large programs

[gusty pawn]

here it is

[midnight wind]

Because it's heavily oop

[gusty pawn]

the outputs are in italian but i think you can look over it

[hollow basalt]

i dunno what that code proves

[gusty pawn]

it's a game

[hollow basalt]

yea, for modularity. I think java still gets it. (not saying others are bad for modularity)

[hollow basalt]

yeaaaa. and?

[gusty pawn]

it asks you if you want to throw a 6 faces thing or a coin

sorry, i can't remember how those 6 faces things that are use for gamblings called

you know what i'm talking about

[midnight wind]

Dice?

[gusty pawn]

yes

[hollow basalt]

yea, but you can create that game in whatever language

[gusty pawn]

i made it for my final exam to show an example of structured programming

[midnight wind]

But anyways there are also some niche languages that are good for a specific purpose

Like I heard of erlang

[gusty pawn]

never heared before

what is it for?

[midnight wind]

Its meant for ha, scalable, real time systems

I think the way it works is that is encourages crashing instead of error handling?

Idk

[hollow basalt]

erlang philosophy is unlike any other

[midnight wind]

No

[hollow basalt]

java: please handle this exception
erlang: shut up and try to reboot

[midnight wind]

I think it's elixir I'm thinking of

Oh

[hollow basalt]

i mean

isn't that called "subset" or something

[midnight wind]

Oh, wait elixir is built on erlang

Yeah I'm not familiar with this stuff

I first read about it here https://developer.x-plane.com/2021/01/have-you-heard-the-good-news-about-elixir/

[still pulsar]

Ayo I have a question, what's the difference between double and float

[wise raft]

Precision. The former uses twice the memory of the latter to express values.

[pliant siren]

double is typically 64-bit, with float being 32... though some systems don't adhere to this.

[thick heron]

in what language?

In C++
Float is 4 bytes
Double is 8 bytes

[warm sleet]

@midnight wind I like that slide

It has just the right amount of erlangesque arrogance

@still pulsar a double is a 'double-precision' float. Its a 64 bit float (instead of 32)

[midnight agate]

Anyone know how to create custom property fields for files with a custom file type? ie I have a file that ends in .foo, and I want to add a property called category.

I'm assuming something has to be done in the registry. I would also like to be able to transfer the files to another os, mac or windows, and retain the values.

[warm sleet]

@midnight agate filetypes are an illusion

the file extension is just part of the name

a word document like .docx is actually just a zip file with some xml inside

[midnight wind]

to see what's inside a binary

binwalk is cool

[warm sleet]

with a hex editor you can usually tell what kind of file it is

but extension is irrelevant

[midnight wind]

yeah

[warm sleet]

thats just for the end user

[midnight wind]

and the os

[warm sleet]

so when you double click it, the right program is used to open it

[midnight wind]

yeah

[warm sleet]

@midnight wind even java jar files and war files are just zip compression xD

[midnight agate]

These are some audio files that use a proprietary codec. they end in .16b, .24b, .fxp. I'm trying to figure out how to store and categorize them with some extra info so that if the name changes I know what they were.

[warm sleet]

@midnight agate those are metadata tags, id3

those are stored inside the file itself

but those mostly applies to home use

[nocturne galleon]

Hi do someone know how to "mount" ext4 drive in android?

[rancid nimbus]

I have two ideas. Idea 1 you make yourself some app that can read the file system. Idea 2 you recompile the kernel for your phone with support, and set up your phone to boot using it. Idea 3 you do not mount ext4.

[nocturne galleon]

idea 4, use another FIle system that can be read by android

[nocturne galleon]

It's little ironic, the os saved on ext4

[nocturne galleon]

Look I'm a progmar but I will never trust my self with data

[warm sleet]

@nocturne galleon https://source.android.com/devices/storage/scoped

You need FUSE for this

@nocturne galleon android is linux, it can read those filesystems. Problem is you need root

[nocturne galleon]

Ah, alr

[warm sleet]

FUSE is the end-all solution to this sort of stuff

allows a non-privileged user to mount a filesystem

[nocturne galleon]

I'm root

[dusty isle]

I have a very common problem that could probably be answered very easy, Ive been working on game cheats using the game “pwnadventures3”, I’ve been doing this for 2 months & I’ve burned myself out. currently Im looking for a side project - does anyone have any good places to look for project ideas I’m not very imaginative & have only tried Twitter 🙂

[spring pond]

look for little things in your daily routine that could be streamlined using a program

[cold bear]

is anyone experienced w python?

[midnight wind]

kinda

just ask

[cold bear]

what would i put for an if else statement to have the process move on to the next line

[midnight wind]

wdym

it will continue once it finishes running anything in the if, else

[cold bear]

so I have it set up like:

if any(....):
time.sleep(5)
continue

else:

-------------- (end block, need it to move to next)

" File "<ipython-input-237-fa258d6802df>", line 24
else:
^
SyntaxError: unexpected EOF while parsing"

[midnight wind]

you need to put something in the else

or get rid of the else

you can't have an empty statement in python

[cold bear]

what would I put in the else: to have it move on and not just repeat the if part

thats what i'm asking

[midnight wind]

I'm confused on what you are trying to do

[cold bear]

I am setting up an if else script to repeat the beginning for the if, and continue to the later parts for the else

[midnight wind]

yes but I'm still confused, show the full code

[cold bear]

wd = wd.Chrome()
wd.implicitly_wait(10)

wd.get("https://activismimpacts.world")

import time
import requests

while True:
url = "https://activismimpacts.world"

homepage = requests.get("https://activismimpacts.world").text.lower()


   websiteerrorstrings = ['error']

# Check whether the strings are in the text of the webpage
if any(x in homepage for x in websiterrorstrings):
    time.sleep(5)
    continue
    
else:  (dont know what to put here)

......... as far as i've gotten

oh i have it backwards i think

but still

[midnight wind]

so the else part will only run if you don't have a object in homepage

[warm sleet]

I'm dying at work

[midnight wind]

so only when there is a error

[cold bear]

right

[warm sleet]

A co-worker spent 5 hours today merging 5 files (~200 lines each)

I went on screenshare with them, to have a look at why it was taking so long

idk how to explain how rediculous it was

[midnight wind]

so what I would put there is just some of console error output

[warm sleet]

they used a word document in landscape layout... with a 2 column table, with the source code copy pasted inside

[midnight wind]

?

oh

[midnight wind]

whyyyyyyy

[warm sleet]

Like

if you do this

use notepad

but of all the programs

word

idk how to respond..

[severe viper]

oh fuck i got an idea for the server

imagine having a shitty IDE theme channel xD

[warm sleet]

so people can share their IDE's with anime backgrounds?

[hollow basalt]

that reminds me, my jetbrains ide is not anime

i must find one

[warm sleet]

F

[hollow basalt]

do you have fun plugins though

i only have this one
https://plugins.jetbrains.com/plugin/8575-nyan-progress-bar

[worthy dirge]

Get this https://plugins.jetbrains.com/plugin/15865-anime-memes

[hollow basalt]

yea that looks good, but I would think the people at my work wouldn't be too amused to see anime when i present the code

[midnight wind]

idk a bout brightness, any software brightness would be artifical anyway.

iirc no

although there is a blue light thing I use

that automatically adjusts

yep

I mean, there is probably a way

depends on the screen

if it's something external

or like on a laptop

[hallow pilot]

Maybe check out how this one works https://github.com/emoacht/Monitorian

[slender sand]

I was hoping someone here could help me with my small coding-problem:

I have really simple python code:

import matplotlib.pyplot as plt

x = [1, 2, 3, 4]
y = [2, 4, 6, 8]

print("Hello, World!")

plt.plot(x, y)
plt.show()

When i run the code via my normal terminal the plot shows up as expected, but when i run it via VSCode (no matter what option i pick) it doesn't show my plots (the rest of the code works as expected).

I'm using anaconda which i guess is what's causing my problem here. The import seems to work correctly as i don't get anny errors, "Hello, World" is the only output i get.

I'm on a fresh install of the latest non-lts ubuntu version.
Plots also don't show up if i run the program via a zsh shell within vscode

I already posted this in the wrong channel, sorry for that.

[slender sand]

Fixed it with the help from a buddy.
We noticed that the code works in vscode if we enter

export DISPLAY=:0

In the shell in vscode.

Enabling Terminal -> Integrated: Inherit Env solved the problem for me.

(I always start vscode from the commandline)

[warm sleet]

@slender sand that's an environment variable that is normally set by your DE when you login

[slender sand]

Yes, but as inherit env was disabled it did not set the env variable.

[warm sleet]

inheriting it, should fix it yes :)

normally those things are inherited automatically

since they are spawned as subprocesses of the parent environment

[slender sand]

Yea, vscode gave me a warning that i should disable that when i first opened it as it may give me trouble bc of anaconda.

I reenabled it and now it works

[warm sleet]

nice

@slender sand often these things can be resolved by just doing source /etc/environment

that's where the system's environment variables are set

[slender sand]

Yea i know that, but i don't want to do this every time i startup vscode

[warm sleet]

the user context is then loaded from either /etc/profile or ~/.bashrc

[slender sand]

In my case .zshrc 😄

[warm sleet]

yep same here ^^

[slender sand]

This shell looks just way to nice xD

[warm sleet]

ubuntu? :P

[slender sand]

I love the option that you could in theory even add emojis 😄

[warm sleet]

all da purple

[slender sand]

Yea, i pref ubuntu bc it's the easiest distro for the ml-stuff i do

OpenAI works just out of the box lol

[warm sleet]

No LSB modules are available.
Distributor ID:    Ubuntu
Description:    Ubuntu 20.04.2 LTS
Release:    20.04
Codename:    focal

^ my laptop

Except I got rid of all the ubuntu-esque crap

ubuntu dock, all the purple stuff is gone too

[slender sand]

I use manjaro on my crappy laptop, i do the main work on the pc 😄

[warm sleet]

its all grey for me

[slender sand]

Send a screenshot lol

That does arguably look better

[warm sleet]

only crappy thing is the title bar of the windows

they are too big

have yet to figure out how to make it smaller

@slender sand my favorite GNOME extension ^

[slender sand]

I know this one from manjaro, really neat 😄

[warm sleet]

toggle for a terminal that drops down

with opacity, if you are reading off a webpage and it covers the bit you are trying to read

can still see it somewhat

[slender sand]

I have a very very big monitor, i never have anything on full screen xD

[warm sleet]

Yeah 1080 xD

[slender sand]

4k 32 inch

[warm sleet]

yeah 15" laptop lol

[slender sand]

Bigger than my tv

[warm sleet]

images contain doxxable infos, so rip

[slender sand]

really nice for writing code 😄

[slender sand]

wdym?

[warm sleet]

company name :P

@slender sand da other machine ^ in my attic

That machine mostly hosts virtual machines for me

@slender sand Cheap $900 machine, but... it has got the goods where it counts

16GB ECC memory, and 10G networking xD

[slender sand]

I'm very happy with my pc as well, i'd just like a better gpu but i won't pay like 3x the price

[warm sleet]

Hah. I had that with my GTX570

I bought a 980Ti off a friend for 90 bucks

[slender sand]

I'm on a 1050TI

With a 3800X

[warm sleet]

@slender sand beast of a chip. Yeah I bought the 2600 as a server chip

and I Was so impressed with it, that I bought a 3600 for my desktop

$150 for a 6-core chip that decimates all that came before? yes please

my old i7 2700k was fast, very fast, but even that one started struggling with the GTX980

[slender sand]

I hate waiting for compiling while coding. This chip just cuts down waiting time by a lot (compared to the shitty i5 i used to have)

I sadly don't remember the exact model

[warm sleet]

I was working on a duo-core laptop for the longest time

I heavily relied on features of the java VM, like hot-compile

to make development expedient

reload code while the program is running

[slender sand]

Never knew that was a thing

[warm sleet]

It is :D

And if you have proper structure in your software, it works well too

Any new instances of a class, get created with the new code

old instances, stay alive

you cannot rename existing fields/methods, only modify or add new members

[slender sand]

I'm currently working together w a friend and she is still using a very old macbook. I can run all unittests within ~1-2 seconds and for her it takes like up to a minute.

Which is kinda bad for my coding style as i tend to sometimes just brute-force until i figure it out

[warm sleet]

-DskipTests=true

ez

[slender sand]

Y but if i wanna know if my tests pass NOW i kinda can't skip the tests

[warm sleet]

thats what I have a pipeline for

I don't typically run tests on my development machine, unless I need to

because it takes 20 minutes

xD

[slender sand]

We are still in university so our projects / tests are not that big

[warm sleet]

Ah yes

but even tests can be slow if they are poorly written

like

starting an entire database pool up to do integration tests

spinning up db instance, inserting test dataset

execute test, restore transaction safepoint, execute 2nd test

and so on

[slender sand]

Yea, luckily we just have very simple ones 😄

All tasks we have are just writing a few methods and to test these.

[glad glen]

So I'm using sqlite to create a database. Is there a way to have an array stored in a cell (for each row in a column) and then select all goes which contain a word found in those arrays?

Just new to databases so don't burn me

Also I'm collecting the data by scraping websites with bs4 and managing the database with apsw if that helps

[hollow basalt]

can you describe your data more

should be fine to store it like that, but just making sure you store it optimally

[glad glen]

It's gonna be image links scraped off websites like Tumblr and deviantart and I want to find images which match their tags hence the array

[hollow basalt]

you could tag it then

[glad glen]

Wdym?

[slate frigate]

Sounds like it’d be better to store everything in a json object, and have the database be a simple key:value structure, the value being the json string.

[hollow basalt]

for RDS,
could be

[glad glen]

Just there could be thousands of images

[hollow basalt]

then select all those with "human" column for example

[glad glen]

Just each image could have multiple tags and I don't know how many

[hollow basalt]

but yea. json seems fine

[hollow basalt]

could you give us an item for example

so we could suggest based on your data

[glad glen]

One sec

[slate frigate]

And if you are managing that much data, implementing bloom filters could be helpful too with query speed

[glad glen]

https://maojin.tumblr.com/post/152240406104/nerd

What's a bloom filter?

[hollow basalt]

uhh, i thought you're going to give us actual data that can be found in your array

[slate frigate]

Probabilistic way of determining if data exists in a data set

[hollow basalt]

ah yes time to bring out the algo

[glad glen]

Ohhh. I mean I don't have the array right now. Just trying to figure out how to do it

But it would just contain the tags for images like that

[hollow basalt]

so like

{
  "link": "https",
  "tags" : [
    "anime",
    "boy"
  ]
}

yeaa, json seems fine

[slate frigate]

Plus sounds like he’s doing it in python, and python had a GREAT bloom filter library

[glad glen]

Yea. Just thinking whether json or sqlite would be better

[hollow basalt]

he should definitely do it in assembly

[glad glen]

[slate frigate]

Json is a way to format data, SQLite is a database for data. They’re not the same thing, you can use both together.

Although I’d shy away from using SQLite, purely for performance reasons.

[hollow basalt]

😳

[glad glen]

Would it not be slow with json if I have thousands of items?

[hollow basalt]

wdym

json is a format

are you referring to json-like databases? dynamodb, mongo etc?

[glad glen]

No

Just accessing the file from python

Would it be slow if there's thousands of items

And wouldn't it take up alot of memory space

[slate frigate]

Don’t store in a text file. Put the json in a database.

[hollow basalt]

Don’t store in a text file
Who would do that

👀

[glad glen]

So in the database (sqlite maybe), I can have a url column and a tag column which stores the tags in an array (or json)?

[slate frigate]

Yeah, you can.

You can also look to use splunk as an endpoint. It’ll handle the data, you just have to http forward everything to it

[hallow pilot]

What kind of program is this? Web app? Command line or gui app you run locally? A database might or might not be worth it

[slate frigate]

He’s already talking thousands of images/datasets. Definitely want a database.

[hallow pilot]

If you want queries and indices and fault tolerance and transactions and other database things then sure. But if it's just a local toy then a data structure in memory might be fine.

For my own projects I would lean toward using a database for future flexibility. I just want to point out that if learning about databases is not one of the goals, and you don't need one badly, there's probably a path forward without.

I'm curious what kinds of performance pain you've had with SQLite. What were you using it for?

[slate frigate]

Myself? Web scraper.

On a very large scale

Also, SQLite can’t be touched off host

[hallow pilot]

Yeah in my mind SQLite is filed under "I want to work with a database, but I'm writing a single-user application that is the sole user of it"

So like, a save file for a game, or persistence for a mobile app

[slate frigate]

I see it more as a prototyping tool.

Course, I don’t usually have a table set up any more complicated than key:value. I let bloom filters and json do the real work for me

Or if I’m really crunching data, I just offload to splunk.

[dim shard]

Hey, any suggestions as to what I should learn next in Java?

Completed Comp Sci I & II

And my teacher stopped "teaching" about last September, and there's no Comp Sci III at my School

[slate frigate]

Learn another less masochistic language?

[hollow basalt]

brainfuck

[gaunt mountain]

rust

[spring pond]

kotlin if you want java but better

or c# if you want java but different

[dim shard]

Well i want to learn a lil more Java rather than just jumping into another lanaguage

[shy helm]

It’s hard to know what to say without knowing what you actually were taught so far

Learning programming >> learning a language

[spring pond]

yeah its hard to describe when you should jump to another lang

i made the jump a few months after taking AP CS A

[sweet ferry]

What was the hardest task in Comp Sci II? Maybe I can help you from there..

If I have an idea what you've done so far

[shy helm]

If you want to be a good engineer focus on the fundamentals, the language shouldn’t matter that much

[spring pond]

i think its always good to experience a low-level language like c/c++ to learn about strict memory management but yeah fundamentals are the most important

[sweet ferry]

I agree, but they're just starting out, and they should learn the fundamentals at least in the most comfortable way for them right now IMO

they can switch later

especially if additional classes will be in java, it would be better to have more skill at java for them too I imagine

[spring pond]

im curious how long these classes are, because if they're full year classes he has a lot of experience already

[sweet ferry]

comp sci I and II.. probably 2 semesters yeah

[spring pond]

thats the other option, and even then he'd probably have all of the core stuff down and maybe inheritance

again very hard to guess without course layout

[sweet ferry]

quite possible yeah

related classes

[shy helm]

If these are high school classes I wouldn’t be too certain haha

[spring pond]

if they were hs classes then id assume he's taken 2 years of cs, otherwise only 1

[gaunt mountain]

If you like physics then try game development

[shy helm]

There’s a lot of fundamentals missing in most high school CS, really without knowing what was taught it’s hard to judge

[spring pond]

the ap course i took for cs taught me up through inheritance and arraylists but nothing more

generics were a big thing that was left out

[shy helm]

Gotcha, tbf it also depends on what the goal is, so knowing a bit about that is also important