Re: is setfenv useless?

[PA <petite.abeille@...>]

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/