Graal Forums - Function arguments with default values

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- - Function arguments with default values (https://forums.graalonline.com/forums/showthread.php?t=134264706)

xXziroXx

10-04-2011 08:23 AM

Function arguments with default values

You know what would be *really* awesome? If you could define a default value to function arguments, Python style.

PHP Code:


		
			
function argumentTest(temp.foobar, temp.barfoo=true)

In the above example, temp.barfoo would be set to true if a value isn't defined in the function caller.

Can haz plz? :cry:

salesman

10-04-2011 04:36 PM

Graal just treats undefined variables as null, so why not just do something like this?

PHP Code:


		
			
function argumentTest(temp.foobar, temp.barfoo) {

  temp.barfoo = temp.barfoo == null ? true : temp.barfoo;

  // ...

}

xXziroXx

10-04-2011 05:18 PM

Quote:

Originally Posted by salesman (Post 1669975)

Graal just treats undefined variables as null, so why not just do something like this?

PHP Code:


		
			
function argumentTest(temp.foobar, temp.barfoo) {
  temp.barfoo = temp.barfoo == null ? true : temp.barfoo;
  // ...
}

Because of convenience mainly, just like most of the other suggestions posted here.

Tolnaftate2004

10-04-2011 05:37 PM

Better yet, || and && shouldn't return boolean, but rather the last-evaluated operand:

PHP Code:


		
			
function foo(bar,baz) {
  bar = bar || true;
  baz = baz || "Hey, how're you doin'? ;)";
}

e: You saw nothing.
e2: Actually, if || and && are using the same optimization as here, that would have to change for this to make any sense.

But perhaps we could just have ||= and &&=

PHP Code:


		
			
function foo(bar,baz) {
  bar ||= true;
  baz ||= "Hey, how're you doin'? ;)";
}

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