if (typeof String.prototype.supplant !== 'function') {
    String.prototype.supplant = function (o) {
        return this.replace(/{{([^{}]*)}}/g, function (a, b) {
            var r = o[b];
            return typeof r === 'string' ? r : a;
        });
    };
}

var obj = {
    a: "text",
    b: "text 2",
    c: "text 3"
}

var stringA = "http://{{a}}.something.com/",
    stringB = "http://something.{{b}}.com/",
    stringC = "http://something.com/{{c}}";

alert(stringA.supplant(obj));

stackoverflow

best-resources-to-learn-javascript

function escapeHTML(text) {  
    var replacements = {
        "<": "&lt;",
        ">": "&gt;",
        "&": "&amp;",
        "\"": "&quot;"
    };

    return text.replace(/[<>&"]/g, function(character) {  
        return replacements[character];  
    }); 
}

var list = [1,2,3,4,5,6,7,8,9];

list = list.sort(function() {
    return Math.random() - 0.5;
});

console.log(list);

Sometimes you need to do things in order. Do one thing, wait for it to finish, maybe asynchronous, and the continue with the next one. This in programming is called a tail implementation. Here is a very basic tail in javascript.

var data  = [16, 11, 9, 7, 26, 25],
    len   = data.length,
    tail  = [],
    start = null,
    i;

// simulate lots of data
for (i = 0; i < len; i++) { 
  go({pos:i, val:data[i]});
}

/**
 * Entry point - incomming data!
 */
function go(obj) {

    // add data to tail array
    tail.push(obj);

    // start first run, on first data entry
    if (!start) {
        run(tail.shift(), finish);

        // start the loop
        start = true;
    }
}

/**
 * Run command from tail array
 */
function run(obj, cb) {
    var delay = getRandomInt(1000, 5000);

    // simulates job, with different time execution
    setTimeout(function() {
        console.log("CMD: " + obj.pos + ":" + obj.val);
        cb({isok:"OK", delay:delay});
    }, delay);
}

/**
 * Callback from run(). Hare we contionue the
 * execution if tail array contains other commands.
 */
function finish(res) {
    console.log("RES: isok:" + res.isok + " delay:" + res.delay);
    console.log("INF: tail length:" + tail.length);
    console.log("==========");

    // if no data in array, stop execution
    if (tail.length === 0) {

        // stop the loop
        start = null;
        return;

    // if still data continue execution with next tail element
    } else {
        run(tail.shift(), finish);
    }
}

/**
 * Randomly generated delay
 */
function getRandomInt(min, max) {
    return Math.floor(Math.random() * (max - min + 1)) + min;
}