Getting the function arguments in javascript like in PHP

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., Jan 19 '13 at 00:11

Maël Nison · Answer 1 · 2013-01-19T01:30:12.450

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 '13 at 01:30

answered Jan 19 '13 at 00:12

Maël Nison

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score 1 · Accepted Answer · answered Jan 19 '13 at 00:12

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 '13 at 00:12

VisioN

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Thanks. The simpler the better I suppose. – ObiHill Jan 19 '13 at 02:14

score 0 · Answer 3 · answered Jan 19 '13 at 00:12

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 '13 at 00:12

Peter Rowell

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score 0 · Answer 4 · answered Jan 19 '13 at 00:19

0

Those function you have been ported to js:

{php} .js

answered Jan 19 '13 at 00:19

Nabil Kadimi

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But should probably not be used except for looking how to use the underlying JS features. – Maël Nison Jan 19 '13 at 01:31
@Nabil Thanks, I use PHPJS quite extensively but in this case, it seems a bit overkill for the circumstance. – ObiHill Jan 19 '13 at 02:11
@Chuck Ugwuh, array()... yes, but not the other functions – Nabil Kadimi Jan 19 '13 at 10:30

Getting the function arguments in javascript like in PHP

4 Answers4