#1822 - Sign of the Product of an Array

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Problem Description

Implement a function signFunc(x) that returns:

1 if x is positive.
-1 if x is negative.
0 if x is equal to 0.

You are given an integer array nums. Let product be the product of all values in the array nums.

Return signFunc(product).

Solution

/**
 * @param {number[]} nums
 * @return {number}
 */
var arraySign = function(nums) {
  let negativeCount = 0;

  for (const num of nums) {
    if (num === 0) return 0;
    if (num < 0) negativeCount++;
  }

  return negativeCount % 2 === 0 ? 1 : -1;
};