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#1822 - Sign of the Product of an Array
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;
};