10apr23evenNum.ts

Given an array nums of integers, return how many of them contain an even number of digits.

 

Example 1:

Input: nums = [12,345,2,6,7896]
Output: 2
Explanation: 
12 contains 2 digits (even number of digits). 
345 contains 3 digits (odd number of digits). 
2 contains 1 digit (odd number of digits). 
6 contains 1 digit (odd number of digits). 
7896 contains 4 digits (even number of digits). 
Therefore only 12 and 7896 contain an even number of digits.
Example 2:

Input: nums = [555,901,482,1771]
Output: 1 
Explanation: 
Only 1771 contains an even number of digits.
 

Constraints:

1 <= nums.length <= 500
1 <= nums[i] <= 105

/**
 * @param {number[]} nums
 * @return {number}
 */
var findNumbers = function(nums) {
    //nums is an array
    //that array has elements
    //convert those elements into strings
    //get string length
    //filter strings whose length is even
    
    let res = 0
    for(let num of nums){
        //12 --> "12" --> ["1", '2']
        let stringified = num.toString().split('')
        if(stringified.length % 2 === 0){
            res++
        }    
    }
    return res
};