### 1295 Find Numbers With Even Number Of Digits

```/**
*
* Ashish Patel
* e: ashishsushilPatel@gmail.com
* w: https://ashish.me
*
*/

/*
* 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.
*/

function checkEven(num){
let noOfDigits = 0
while(num > 0){
num = Math.floor(num/10)
noOfDigits += 1
}
return (noOfDigits % 2 === 0)
}

function findNumbersWithEvenNumberOfDigits(nums) {
return nums.filter(n => checkEven(n)).length
}

test('find Numbers With Even Number Of Digits', () => {
expect(findNumbersWithEvenNumberOfDigits([12,345,2,6,7896])).toEqual(2)
});```

Created 2020-04-20T13:15:18+00:00 · Edit