CODEWITHSUNDEEP
javascript
sggk
sggk

Reputation: 31

make a function that takes in two arrays. Add all the numbers in arr1 & arr2. If the sum of arr1 is equal to arr2 return true. False if not

So, I know how to add up the integers in my given array but I am totally stumped on the comparison logic and returning the bool. Recursion or reduce can be used. It doesn't really matter.

This is the last quiz I have to take for my class before I can go on break

function isBalanced(arr1, arr2){
  arr1.reduce((a, b) => {
    return a + b;
  }, 0);
  arr2.reduce((a, b) => {
    return a + b;
  }, 0);
  return arr1 === arr2;
}

I'm getting expected false to be true in my tests.

Upvotes: 2

Views: 392

Answers (2)

NeNaD
NeNaD

Reputation: 20354

You can do it like this:

let array_1 = [1,2,3,4,5];
let array_2 = [10,5];

const check_if_equal = (arr_1, arr_2)=> arr_1.reduce((a, b) => a + b, 0) === arr_2.reduce((a, b) => a + b, 0);

console.log(check_if_equal(array_1, array_2));

Upvotes: 0

Unmitigated
Unmitigated

Reputation: 89374

You can use Array#reduce to find the sum of an array. Then, just compare the sums of the two arrays.

function sum(arr) {
  return arr.reduce((a, b) => a + b, 0);
}
function sumEqual(arr1, arr2) {
  return sum(arr1) === sum(arr2);
}
console.log(sumEqual([1, 3, 2], [3, 2, 1]));

Upvotes: 1

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