#cant solve problem

1 messages · Page 1 of 1 (latest)

deep snow
#

Given the integer array dailyPrices with the size of NUM_ELEMENTS, assign numMatches with the number of integers in userValues that are equal to 9.

Ex: If the input is 109 9 38 51 9 9 104 9, then the output is:

Number of 9s in array: 4

import java.util.Scanner;

public class ValueMatcher {
public static void main(String[] args) {
Scanner scnr = new Scanner(System.in);
final int NUM_ELEMENTS = 8;
int[] dailyPrices = new int[NUM_ELEMENTS];
int i;
int numMatches;

  for (i = 0; i < dailyPrices.length; ++i) {
     dailyPrices[i] = scnr.nextInt();
  }

  /* Your code goes here */

  System.out.println("Number of 9s in array: " + numMatches);

}
}

i cant solve this question without changing the given loop, but my code can only go in the comment. Please help

strange swallowBOT
#

<@&987246399047479336> please have a look, thanks.

strange swallowBOT
#

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#

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#

and NUM_ELEMENTS is 5, the output is:
numMatches = 1.

digital compass
#

Have a counter variable and each time you come across 9, increment the counter

sour dune
#

^

#

if(dailyPrices[i] == 9){numMatches += 1;}

plain tree
#

alternatively, stream api: int numMatches = (int) Arrays.stream(dailyPrices).filter(f -> f == 9).count();

sour dune
#

^

hasty halo
sour dune
#

stream would be part of lambda function right? or is that separate? I always mix these up

hasty halo
#

i believe it makes writing streams much more cleaner, but it's a separate concept.

deep snow
hasty halo
deep snow
deep snow
plain tree
#

assign 0 to it

subtle mango
hasty halo
sour dune
plain tree
#

regular old expressions

deep snow
#

It's ok thanks guys, i got it, the program wanted me to make a new variable.

this is the "correct answer"

First, numMatches is initialized with 0. Then, a for loop iterates through all the integers in array dailyPrices. An if statement in the for loop increments numMatches by 1 only if the element matches matchValue.

plain tree
#

lambdas are anonymous implementations of methods

deep snow
#

matchValue never existed in the code or was stated in the prompt

#

so i had to used a hint which revealed

sour dune
subtle mango
plain tree
#

the actual interface implementation is created by the indy bsm the lambda compiles to

#

the only thing you write is the implementation of the method

deep snow
#

bro what are you guys talking about

#

i have no clue

plain tree
#

lambdas

deep snow
#

this is my first week of java

subtle mango
#

yea ignore all of that

plain tree
#

yeah this is deep into the internals of how the language works, you dont need to worry about it

deep snow
#

when would i need to learn this though?

viral palm
#

they are discussing around your problem, they shouldnt really do that in here 😉

plain tree
viral palm
#

they are all offering solutions, but since your starting , none of those can be used

deep snow
subtle mango
deep snow
subtle mango
#

so u solved it?

deep snow
#

yeah i was suppose to make a new interger to assign the values to

subtle mango
#

okay nice

hasty halo