Source @ github

Function.apply

apply

Description

Function.apply(object this, [array arguments])

Parameters

Name Description Type Default Optional
this object No
arguments array Yes

Examples

Example #1 – apply example
var f = function () {
	return this;
};
console.log(f.apply(location.hash));  // Sets a custom this value for the function.
Example #2 – apply example
var getName = function () {
	return this.name.first + ' ' + this.name.last;
}

var lars = {
	name: {
		first: 'Lars',
		last: 'Doe'
	}
};

console.log(getName.apply(lars));
Example #3 – apply example
var getName = function (lastFirst, includeAge) {
	var result = '';
	if (lastFirst) {
		result = this.name.last + ', ' + this.name.first;
	}
	else {
		result = this.name.first + ' ' + this.name.last;
	}
	if (includeAge) {
		result += ' (' + this.age + ')';
	}
	return result;
}

var lars = {
	name: {
		first: 'Lars',
		last: 'Doe'
	},
	age: 20
};

console.log(getName.apply(lars));                  // Lars Doe
console.log(getName.apply(lars, [true]));          // Doe, Lars
console.log(getName.apply(lars, [false, true]));   // Lars Doe (20)

External references