1822.js

/** ------------------------------------------------------------------------------
 * 
 * 2023-05-02
 * 1822. Sign of the Product of an Array
 * https://leetcode.com/problems/sign-of-the-product-of-an-array/
 * 
 ------------------------------------------------------------------------------ */
/**
 * @param {number[]} nums
 * @return {number}
 */
var arraySign = function (nums) {
  let answer = 1;

  for (const num of nums) {
    if (num === 0) return 0;
    answer *= num;
  }

  return answer > 0 ? 1 : -1;
};

/**
 * @param {number[]} nums
 * @return {number}
 */
var arraySign = function (nums) {
  let product = 0;
  for (let i = 0; i < nums.length; i++) {
    if (nums[i] == 0) {
      return 0;
    } else if (nums[i] < 0) {
      product++;
    }
  }
  if (product % 2) {
    return -1;
  } else {
    return 1;
  }
};