A scratch-pad (playground) for javascript stuff, as I learn it.

JavaScriptPlayground

/* Invoking functions via parameters to other functions */
var work = function() {
  console.log("this is being invoked");
};

var doWork = function(f) {
  console.log("invoking work");
  try {
    f();
  } catch (ex) {
    console.log(ex);
  }
  console.log("work has been invoked");
};

doWork(work);

/* Encapsulation module pattern */
var program = function() {

  /* Revealing module pattern */
  var createWorker = function() {

    // workCount will not be exposed to the user, directly
    var workCount = 0;

    // Create tasks
    var task1 = function() {
      workCount += 1;
      console.log("task1 " + workCount);
    };

    var task2 = function() {
      workCount += 1;
      console.log("task2 " + workCount);
    };


    // return tasks as "job1" and "job2"
    // applying aliases on the vars
    return {
      job1: task1,
      job2: task2
    };

  };

  var worker = createWorker();

  worker.job1();
  worker.job2();
  worker.job2();
};

// can be invoked as IIFE - Immediately invoked function expression - by adding
// () in place of the final semi-colon, wrapping in brackets, and dropping
// "var program = "

program();

/* IIFE pattern of previous method */
(function() {

  // IIFE is used as JavaScript interpreters don't "like" annonymous
  // method calls (I.E
  //  function (someData) { ... };

  /* Revealing module pattern */
  var createWorker = function() {

    // workCount will not be exposed to the user, directly
    var workCount = 0;

    // Create tasks
    var task1 = function() {
      workCount += 1;
      console.log("task1 " + workCount);
    };

    var task2 = function() {
      workCount += 1;
      console.log("task2 " + workCount);
    };


    // return tasks as "job1" and "job2"
    // applying aliases on the vars
    return {
      job1: task1,
      job2: task2
    };

  };

  var worker = createWorker();

  worker.job1();
  worker.job2();
  worker.job2();
}())