JavaScript_Succinctly

Invoking a function (function, method, constructor, or call() and
apply())
Functions are invoked using four different scenarios or patterns.
As a function
As a method
As a constructor
Using apply() or call()
In the following sample, we examine each of these invocation patterns.
Sample: sample90.html
// Function pattern.
var myFunction = function () { return 'foo' };
console.log(myFunction()); // Logs 'foo'.
// Method pattern.
var myObject = { myFunction: function () { return 'bar'; } }
console.log(myObject.myFunction()); // Logs 'bar'.
// Constructor pattern.
var Cody = function () {
this.living = true;
this.age = 33;
this.gender = 'male';
this.getGender = function () { return this.gender; };
}
var cody = new Cody(); // Invoke via the Cody constructor.
console.log(cody); // Logs the cody object and properties.
// apply() and call() pattern.
var greet = {
runGreet: function () {
console.log(this.name, arguments[0], arguments[1]);
}
}
var cody = { name: 'cody' };
var lisa = { name: 'lisa' };
// Invoke the runGreet function as if it were inside of the cody object.
greet.runGreet.call(cody, 'foo', 'bar'); // Logs 'cody foo bar'.
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