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  #1  
Old 11-29-2009, 09:07 PM
WhiteDragon WhiteDragon is offline
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Function Closures

Inline Closures
These would be useful to make code a bit cleaner:
PHP Code:

foobar
(function (temp.atemp.b) {
  return 
temp.temp.b;
}); 

In-place Execution
This would be useful for proper scoping (since we don't have block scope):
PHP Code:

temp
.= function () {
  
temp.foo 3;
  
temp.bar 50;
  
temp.baz 4;
  return 
temp.foo temp.bar temp.baz;
}(); 
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  #2  
Old 12-12-2009, 12:52 AM
WhiteDragon WhiteDragon is offline
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Another cool thing would be binding variables to the closure during creation:
PHP Code:
function foo() {
  
temp.2;
  
temp.= function (temp.xtemp.y) use (temp.a) {
    return (
temp.temp.y) * temp.a;
  };
  
this.bar(temp.f3);
}

function 
bar(temp.ctemp.d) {
  echo(
temp.c(4temp.d)); // would echo 14

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  #3  
Old 12-12-2009, 01:21 AM
Admins Admins is offline
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Quote:
Originally Posted by WhiteDragon View Post
Inline Closures
These would be useful to make code a bit cleaner:
PHP Code:

foobar
(function (temp.atemp.b) {
  return 
temp.temp.b;
}); 
You mean instead of doing this?
PHP Code:
temp.func = function (temp.atemp.b) {
  return 
temp.temp.b;
};
foobar(temp.func); 
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  #4  
Old 12-12-2009, 01:30 AM
WhiteDragon WhiteDragon is offline
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Quote:
Originally Posted by Stefan View Post
You mean instead of doing this?
PHP Code:
temp.func = function (temp.atemp.b) {
  return 
temp.temp.b;
};
foobar(temp.func); 
Yes.

In a script where I created 40 to 50 different closures it was getting irritating to create a junk variable like that.
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  #5  
Old 12-12-2009, 01:51 AM
Skyld Skyld is offline
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Quote:
Originally Posted by WhiteDragon View Post
Yes.

In a script where I created 40 to 50 different closures it was getting irritating to create a junk variable like that.
It is not really a junk variable because when you define a function normally, you are still creating a variable which contains the function object without realising it. In any other case, what other language uses that kind of syntax that you suggested? It is horrendously ugly.
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  #6  
Old 12-12-2009, 02:31 AM
WhiteDragon WhiteDragon is offline
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Quote:
Originally Posted by Skyld View Post
It is not really a junk variable because when you define a function normally, you are still creating a variable which contains the function object without realising it.
It is a junk variable because I create it, and only use it one time.

Quote:
Originally Posted by Skyld View Post
In any other case, what other language uses that kind of syntax that you suggested?
Any C-like language with support for closures/anonymous functions. Try ECMAScript (JavaScript, ActionScript, QtScript, Objective-J), or PHP.

All the functional languages such as Haskell, Erlang, LISP, and Scheme also allow defining the function inline, so the concept is not bogus either.
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  #7  
Old 12-12-2009, 02:09 PM
Loriel Loriel is offline
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Quote:
Originally Posted by WhiteDragon View Post
It is a junk variable because I create it, and only use it one time.
Maybe you could reuse it for the next time you need an anonymous function!!

Quote:
Any C-like language with support for closures/anonymous functions. Try ECMAScript (JavaScript, ActionScript, QtScript, Objective-J), or PHP.
Man, I want to agree with this thread on principle, but after you calling PHP C-like, I really just want to punch you in the face with a monoid in the category of endofunctors.

Worth adding that lua has the almost the same syntax except without the curly braces because not having curly braces there is what lua does, C# has almost the same syntax except with delegate instead of closure because calling something anonymous a function scares OOP programmers, etc. Perl has the same kind of feature except without a parameter list and yet another keyword.

Quote:
All the functional languages such as Haskell, Erlang, LISP, and Scheme also allow defining the function inline, so the concept is not bogus either.
With GS2 basically looking like Javascript, that is the only comparison there is. If people feel that adding Javascript's syntax for anonymous functions is not worth it, comparing to even crazier languages is not going to help, I suspect.
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  #8  
Old 01-30-2010, 02:22 AM
WhiteDragon WhiteDragon is offline
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Bump.

This could be used on the iPhone too!
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  #9  
Old 01-30-2010, 02:39 AM
12171217 12171217 is offline
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Quote:
Originally Posted by WhiteDragon View Post
This could be used on the iPhone too!
so?
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  #10  
Old 01-30-2010, 03:03 AM
Immolate Immolate is offline
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I'd like this to be added in but I can't see where average scripters would use it, so putting my self in Stefan's shoes, it'd probably never implemented or really low priority.
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  #11  
Old 01-30-2010, 05:38 AM
coreys coreys is offline
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Quote:
Originally Posted by 12171217 View Post
so?
It's the only way to get something done by Stefan these days, it seems.
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  #12  
Old 01-30-2010, 07:52 PM
LoneAngelIbesu LoneAngelIbesu is offline
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Quote:
Originally Posted by coreys View Post
It's the only way to get something done by Stefan these days, it seems.
Certainly making comments like this will help!
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