JavaScript

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1/**
2 * @description Find the closest number to zero in an array
3 * @param {number[]} nums
4 * @return {number}
5 *
6 * @example
7 * findClosesNumberr([-4, -2, 1, 4, 8]) => 1
8 */
9var findClosestNumber = function (nums) {
10  let size = nums.length;
11  let result;
12
13  for (i = 1; i <= size; i++) {
14    let currVal = nums[i - 1];
15
16    let gap;
17
18    if (currVal < 0) gap = 0 - currVal;
19
20    if (currVal > 0) gap = currVal - 0;
21
22    if (result === undefined) result = gap;
23
24    if (gap < result) result = gap;
25  }
26
27  return result;
28};
29
30/**
31 * @description Find the closest number to zero using Math.abs
32 * @param {number[]} nums
33 * @returns {number}
34 *
35 * @example
36 * findClosestNumberV2([-4, -2, 1, 4, 8]) => 1
37 */
38var findClosestNumberV2 = (nums) => {
39  let closest = Infinity;
40
41  for (let num of nums) {
42    if (Math.abs(num) < Math.abs(closest)) {
43      closest = num;
44    } else if (Math.abs(num) === Math.abs(closest) && num > closest) {
45      closest = num;
46    }
47  }
48
49  return closest;
50};
51
52export { findClosestNumber, findClosestNumberV2 };
53