MUD Coding

Tamsyn@zebedee.org · 07-17-2003, 05:59 AM

OK, for you advanced LPC coders:
If I have a global string variable, say 't' in an object, I can
reference it's value within a closure:

f = lambda( ({}), ({#'write,({#'t}) }) );
funcall(t);

This will do write(t);
My question: Is it possible to dynamically specify/bind the name of the variable. I've tried various ways of using symbol_function() and quote() with no success, and my gut feeling is that it isn't possible.
Anyone have the definitive answer?

markizs · 07-17-2003, 07:29 AM

cool. first decent LPC question i see in topmudsties

shame that i even couldnt understand fully question and no way can answer it.

just were wondering if you didnt mean

funcall(f);

instead of

funcall(t);

Tamsyn@zebedee.org · 07-17-2003, 07:31 AM

yes i did, thanks for pointing that out.

JilesDM · 07-17-2003, 07:02 PM

If you want to bind to an arbitrary global variable in the same object as the closure is being constructed in, it's simple:
[code] string x;
closure f;

x = whatever_variable_name;
f = lambda(({}),({#'write,({#'apply,symbol_variable(x) })}));
[/quote]

The key here is remembering to run the symbol returned by symbol_variable through apply or funcall.

Tamsyn@zebedee.org · 07-21-2003, 04:41 AM

Yep, thanks for that.
Basically my problem boils down to: Our driver is too old, it doesn't have symbol_variable().
No wonder I couldn't get it to work eh

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07-17-2003, 05:59 AM	#1
Tamsyn@zebedee.org New Member Join Date: Mar 2003 Posts: 23	OK, for you advanced LPC coders: If I have a global string variable, say 't' in an object, I can reference it's value within a closure: f = lambda( ({}), ({#'write,({#'t}) }) ); funcall(t); This will do write(t); My question: Is it possible to dynamically specify/bind the name of the variable. I've tried various ways of using symbol_function() and quote() with no success, and my gut feeling is that it isn't possible. Anyone have the definitive answer?

07-17-2003, 07:29 AM	#2
markizs Member Join Date: Jan 2003 Location: Riga, Latvia Posts: 36	cool. first decent LPC question i see in topmudsties shame that i even couldnt understand fully question and no way can answer it. just were wondering if you didnt mean funcall(f); instead of funcall(t);

07-17-2003, 07:31 AM	#3
Tamsyn@zebedee.org New Member Join Date: Mar 2003 Posts: 23	yes i did, thanks for pointing that out.

07-17-2003, 07:02 PM	#4
JilesDM Member Join Date: Nov 2002 Posts: 66	If you want to bind to an arbitrary global variable in the same object as the closure is being constructed in, it's simple: [code] string x; closure f; x = whatever_variable_name; f = lambda(({}),({#'write,({#'apply,symbol_variable(x) })})); [/quote] The key here is remembering to run the symbol returned by symbol_variable through apply or funcall.

07-21-2003, 04:41 AM	#5
Tamsyn@zebedee.org New Member Join Date: Mar 2003 Posts: 23	Yep, thanks for that. Basically my problem boils down to: Our driver is too old, it doesn't have symbol_variable(). No wonder I couldn't get it to work eh

MUD Coding

Advanced LPC question