Equal Sides Of An Array 답안

문제)

www.codewars.com/kata/5679aa472b8f57fb8c000047/train/javascript

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내가 푼 답)

function findEvenIndex(arr)
{
  var result = -1;
  for (var i=0; i<arr.length; i++) {
    var leftArr = arr.slice(0, i);
    var leftArrSum = leftArr.length === 0 ? 0 : leftArr.reduce((acc, curVal) => acc + curVal);
    var rightArr = arr.slice(i+1);
    var rightArrSum = rightArr.length === 0 ? 0 : rightArr.reduce((acc, curVal) => acc + curVal);
    if (leftArrSum === rightArrSum) {
      result = i;
    }
  }
  return result;
}

 

테스트 결과)

 

마음에 드는 남이 푼 소스)