multiply.js

/**
 * @param {number[]} nums
 * @return {number[]}
 */
var productExceptSelf = function(nums) {
    //i: array
    let output = []
    //need to handle division by 0 [1, 0] => [0, 1]
    // need to handle division by -number  [9,0,-2] => [0,-18,0]
    //
    let multiplyAll = nums.reduce(function(a,b){return a*b;});
    
    if(nums.length === 2) {
        output.push(nums[1])
        output.push(nums[0])
        //
    } else {
        for (let i =0; i< nums.length; i++) {
            let res = multiplyAll/nums[i]
            
           if(isNaN(res)) {
                output.push(0)
            } 
            else {
                output.push(res)
            } 
        }
    }
    return output;

    //out: array
    //multipliy all the array elements Allmultiple/num[i]
    // for each element in the output array is the 
    
};