Question

I have a function that needs to append a sequence of numbers (starting with 1) at the end of each word in the string. Here is my function:

function insertNum(str) {
    var word = new Array();
    word = str.split(" ");
    return src[0] + "1 " + src[1] + "2 " + src[2] + "3 " + src[3];
}

insertNum("word word word word."); // return "word1 word2 word3 word4."
insertNum("word word word."); // return "word1 word2 word3."

Answer 1

This should do it…

function insertNum(str) {
    var index = 1;
    return str.replace(/\w\b/g, function(match) {
        return match + index++;
    });
}

jsFiddle.