在 for 循环中使用 array.splice 时发生无限循环

Question

I write this code, for inserting the second argument if any of the array items are bigger than it. but suddenly an infinite loop occurs. ('result.splice(i, 0, num)' causes it) Can anybody tell me why?!

function getIndexToIns(arr, num) {
  let result = arr.sort(function(a, b){return a - b})
  for(let i = 1; i <= result.length ; i++){
    result.splice(i, 0, num)
  }
  return result;
}

getIndexToIns([40, 60, 20, 0], 50);

Answer 1

Your

result.splice(i, 0, num)

inserts a new value at the index and increments the length of the array.

Beside that, you loop over the last given index, too.

Instead, you could sort and iterate from the end to replace grater values with the maximum wanted value.

 function sortAndReplaceGreaterValues([...array], number) { array.sort((a, b) => a - b); let i = array.length; while (i--) { if (array[i] < number) break; array[i] = number; } return array; } console.log(sortAndReplaceGreaterValues([40, 60, 20, 0], 50));