Decompress Run-Length Encoded List.js

var decompressRLElist = function(nums) {
    let result = [];

    for (let i = 0; i < nums.length; i += 2) {
        let freq = nums[i];
        let val = nums[i + 1];

        for (let j = 0; j < freq; j++) {
            result.push(val);
        }
    }

    return result;
};