Getting the function arguments in javascript like in PHP [duplicate]

Question

Possible Duplicate:
Calling dynamic function with dynamic parameters in Javascript
javascript array parameter list

I'm looking for the Javascript equivalent of the following functionality I use in PHP:

function myfunc()
{
     $arg_arr = array();
     $arg_arr = func_get_args();

     $my_arg_val_1 = (!isset($arg_arr[1]) || ($arg_arr[1] == '')) ? true : $arg_arr[1];
}

Basically, I'm trying to get the function arguments. I want to write a javascript function to take one argument, but I want to add some code to do a few things with the second and third argument if it is provided, but I'm not sure how to pull this off.

Any assistance will be appreciated.

Thanks.

You could just have one argument that's an array (I'm not a JS expert though, there might be a better way). — John V.
– John V., Commented Jan 19, 2013 at 0:11

Maël Nison · Accepted Answer · 2013-01-19 01:30:12Z

2

Use the arguments variable.

It's not an array (it's an "Array-like object", which has a few differences with a standard array), but you can convert it to a real array this way :

function myfunc() {
    var argArray = Array.prototype.slice.call( arguments );
    /* ... do whatever you want */
}

edited Jan 19, 2013 at 1:30

answered Jan 19, 2013 at 0:12

Maël Nison

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VisioN · Accepted Answer · 2013-01-19 00:12:13Z

1

In JavaScript there is arguments variable available in each function. It looks like an array which contains all arguments passed to a function:

function myfunc() {
    var arg1 = arguments[0],
        arg2 = arguments[1],
        argc = arguments.length;
}

myfunc(1, "abc");  // arg1 = 1,
                   // arg2 = "abc",
                   // argc = 2

answered Jan 19, 2013 at 0:12

VisioN

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1 Comment

ObiHill Over a year ago

Thanks. The simpler the better I suppose.

Peter Rowell · Accepted Answer · 2013-01-19 00:12:33Z

0

This question is a dupe, but the answer is straightforward:

function foo() {
  for (var i = 0; i < arguments.length; i++) {
    alert(arguments[i]);
  }
}

answered Jan 19, 2013 at 0:12

Peter Rowell

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Nabil Kadimi · Accepted Answer · 2013-01-19 00:19:00Z

0

Those function you have been ported to js:

{php} .js

answered Jan 19, 2013 at 0:19

Nabil Kadimi

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3 Comments

Maël Nison Over a year ago

But should probably not be used except for looking how to use the underlying JS features.

ObiHill Over a year ago

@Nabil Thanks, I use PHPJS quite extensively but in this case, it seems a bit overkill for the circumstance.

Nabil Kadimi Over a year ago

@Chuck Ugwuh, array()... yes, but not the other functions

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