Call a function with variable number of parameters

Question

Possible Duplicate:
Pass arbitrary number of parameters into Javascript function

How can the following be achieved with n arguments?

function aFunction() {

    if ( arguments.length == 1 ) {
        anotherFunction( arguments[0] );
    } else if ( arguments.length == 2 ) {
        anotherFunction( arguments[0], arguments[1] );
    } else if ( arguments.length == 3 ) {
        anotherFunction( arguments[0], arguments[1], arguments[2] );
    }

}

function anotherFunction() {
    // got the correct number of arguments
}

Answer 1

You don't need to do this. Here is how you can call it without caring how many arguments you have:

function aFunction() {
    anotherFunction.apply(this, arguments);
}

function anotherFunction() {
    // got the correct number of arguments
}

Answer 2

You can use the .apply() method to call a function providing arguments as an array or array-like object:

function aFunction() {
    anotherFunction.apply(this, arguments);
}

(If you check the MDN doco I linked to you'll see it mentions your specific example of passing all of a function's arguments to some other function, though obviously there are many other applications.)

Answer 3

Use apply(). This method on the Function's prototype allows you to call a function with a specified this context, and pass the arguments as an array or an array-like object.

anotherFunction.apply(this, arguments);

Answer 4

Like this:

function aFunction() {
    var args = Array.prototype.slice.call(arguments, 0);
    anotherFunction.apply(this, args);
}

Answer 5

Here is the Sample function...

functionName = function() {
   alert(arguments.length);//Arguments length.           
}