Join an array of words with commas and a final "and"

join-with-commas.js

function joinWithCommas (array){
    var result = '';
    $.each(array, function(index, label){
        if (index === 0){
        } else if (index < (array.length - 1)){
            result += ', ';
        } else {
            result += ' and ';
        }
        result += label;
    });
    return result;
};