Re (tilly) 2: Whether to use local()

local only works on global variables

my %foo;
$foo{bar} = " odd then?\n";
{
  local $foo{bar} ="Isn't this";
  print $foo{bar};
}
print $foo{bar};
[download]

:-P

Comment on Re (tilly) 2: Whether to use local() Download Code

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Re: Re (tilly) 2: Whether to use local() by shotgunefx (Parson) on Mar 16, 2002 at 02:05 UTC
I know about local on hash elements and array elements but thought it would complicate the explanation for him. Just like I omitted PadWalker from the explanation of accessing lexicals. Point taken though. Was local on hash/array elements added as a hack for signal handlers? It seems the only real use that I've seen. Or is it used internally when you localize a package var in the symbol table seeing a package is in a sense a hash? -Lee "To be civilized is to deny one's nature."	[reply]
Re: Re: Re (tilly) 2: Whether to use local() by oubiwann (Sexton) on Mar 17, 2002 at 03:17 UTC
Was local on hash/array elements added as a hack for signal handlers? `local` was added to perl when there were only global variables as a hack for providing a means of creating "local" variables. There are other uses for it though, but that is better said here: Seven Useful Uses of `local`	[reply] [d/l] [select]
Re: Re: Re: Re (tilly) 2: Whether to use local() by shotgunefx (Parson) on Mar 17, 2002 at 08:22 UTC
I guess what I find odd about it working on pieces of arrays and hashes is why bother? I mean if it can do a chunk of a lexical hash, why not a whole hash? I can't imagine why the half implementation. I'm sure there was a good reason, but I can't imagine what it is. -Lee "To be civilized is to deny one's nature."	[reply]