Re: is setfenv useless?
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- Subject: Re: is setfenv useless?
- From: PA <petite.abeille@...>
- Date: Sun, 5 Mar 2006 18:55:50 +0100
On Mar 05, 2006, at 16:15, mr. Aleph wrote:
While there are no possibility to clone functions,
local aFunction = function( aName )
return ( "%s! Yes, we can!" ):format( aName )
end
local aFunctionCopy = loadstring( string.dump( aFunction ) )
print( aFunction )
print( aFunction( "Bob" ) )
print( aFunctionCopy, aFunction == aFunctionCopy )
print( aFunctionCopy( "Bob" ) )
print( aFunctionCopy( "Bob" ) )
> function: 0x119350
> Bob! Yes, we can!
> function: 0x119520 false
> Bob! Yes, we can!
setfenv (debug.setfenv) remains almost useless.
Perhaps esoteric, but not useless. Anytime you use loadstring, setfenv
will come handy. setfenv is also a useful way to 'mark' functions for
various devious purpose.
Cheers
--
PA, Onnay Equitursay
http://alt.textdrive.com/