Perform .join on value in array of objects

Question

If I have an array of strings, I can use the .join() method to get a single string, with each element separated by commas, like so:

[\"Joe\", \"         


        

Answer 1

not sure, but all this answers tho they work but are not optiomal since the are performing two scans and you can perform this in a single scan. Even though O(2n) is considered O(n) is always better to have a true O(n).

const Join = (arr, separator, prop) => {
    let combined = '';
    for (var i = 0; i < arr.length; i++) {
        combined = `${combined}${arr[i][prop]}`;
        if (i + 1 < arr.length)
            combined = `${combined}${separator} `;
    }
    return combined;
}

This might look like old school, but allows me to do thig like this:

skuCombined = Join(option.SKUs, ',', 'SkuNum');