#I am so lost...

1 messages · Page 1 of 1 (latest)

agile sparrow
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Ok so this isnt' working

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I'm making variables in minecraft functions

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and the idea is that variables will be used with $(variable name)

mossy olive
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please use a better thread name next itme

agile sparrow
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yeah sorry

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the problem is I don't really know what's not working

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the .replaceAll("string to replace", "what to replace it with")

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doesn't work

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that's my code

mossy olive
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use regex

agile sparrow
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?

mossy olive
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Pattern variablePattern = Pattern.compile("\$([A-Za-z]+)");
Matcher matcher = variablePattern.matcher(text);

StringBuffer result = new StringBuffer();

while (matcher.find()) {
    matcher.appendReplacement(result, variableMap.get(matcher.group(1)));
}
matcher.appendTail(result);
agile sparrow
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what's the problem with .replaceAll

mossy olive
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its too much work for a simple problem

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well an easier problem

agile sparrow
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tellraw {"text":"$(testVar)"}
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that's an example of the command at use

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it identifies that the argument that has "$("

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then it finds the other parentheses

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it them saves that portion of text in variable textToReplace and replaces it with variableName, which is the value of the variable

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why would I use regex for something this simple?

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either way, it's not replacing text

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and I have no idea why

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so that's my main question

mossy olive
agile sparrow
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what's the problem with my solution though

mossy olive
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bruh

agile sparrow
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you just handed me a block of code with absolutely no explanation

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not knowing what the code does, I would rather stick to the stuff I know

mossy olive
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// Variable pattern, example: "Hello, my name is $name!"
Pattern variablePattern = Pattern.compile("\\$([A-Za-z]+)");

// Look for matches in the string.
Matcher matcher = variablePattern.matcher(text);

// A mutable string, that the matcher will use for the "substring", or replacement operations.
StringBuffer result = new StringBuffer();

// For match in matches...
while (matcher.find()) {
    // Append the variable data of the match.
    // In other words, the matcher has been adding all of the characters up until this match.
    // Now, we can make our own replacement.
    // In this case, it would be getting the variable stored in our map.
    matcher.appendReplacement(result, variableMap.get(matcher.group(1)));
}

// Append the rest of the string after the last match.
matcher.appendTail(result);
agile sparrow
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what does mutable mean

mossy olive
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can be changed

agile sparrow
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ok

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so just the oposite of final

mossy olive
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basically

agile sparrow
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and what is while

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just a while loop

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so what is matcher.find()

mossy olive
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find the next match

agile sparrow
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so if you had tellraw {"text":"$(varName)"}

mossy olive
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you would have to change the regex, but it would still work

agile sparrow
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it would find $(variableName)

agile sparrow
mossy olive
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\\$\\(([A-Za-z]+)\\)
agile sparrow
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instead of "\\$([A-Za-z]+)"

agile sparrow
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wait ok but first what is wrong with my existing program?

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even if I don't end up using it, I still want to know

mossy olive
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idk

agile sparrow
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really?

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damn it

mossy olive
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\$\(([A-Za-z]+)\)

regex for $(varName)

"\\$\\(([A-Za-z]+)\\)"

java string (it breaks if it doesnt have extra '\' characters

agile sparrow
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ok

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so what is matcher.find()

mossy olive
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find the next match

agile sparrow
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ok?

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still a little confused

mossy olive
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Pattern pattern = Pattern.compile("a");
Matcher matcher = pattern.matcher("abcdeaf");

while (matcher.find()) {
    System.out.println(matcher.group());
}
agile sparrow
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I still don't understand 🤷‍♂️

mossy olive
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Ok

agile sparrow
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Pattern.compile?

mossy olive
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compile a regular expression

agile sparrow
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ok you see I have no idea what that even means

mossy olive
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it turns this

"\\$\\(([A-Za-z]+)\\)"
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into readable instructions

agile sparrow
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ok

mossy olive
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match $
match (
capture group 1 {
    match (A-Z + a-z) | as many as possible
}
match )
agile sparrow
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and where is it stored

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like, how do I replace it, and dispatch that

mossy olive
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i dont understand