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Re^3: Array iterator factory (())

by ihb (Deacon)
on Mar 17, 2005 at 19:12 UTC ( #440488=note: print w/replies, xml ) Need Help??


in reply to Re^2: Array iterator factory (())
in thread Array iterator factory

It seems that 'everyone' focuses on the & as being the problem and never mention that ampersand with parens is okay, sometimes even an advantage.

Because I've repeatedly pointed out the issue with &foo; I take the easy way in my replies and don't mention &foo() as the alternative. Instead of elaborating on the same issue once again I'll quote myself. From Re: Hash values and constants:

I intentionally avoided mentioning & as a way of disambiguate the constant. This is because it will confuse and mislead people to think that you can do &foo; instead of foo(), which isn't the case.
From Re: Re: Forward-referenceing subs:
For some reason, it's much more common to drop the parenthesis when dereferencing than when making a regular subroutine call.
Therefore I consistently use $foo->() as it doesn't leave room for such subtle unexpected behaviour as &$foo; presents.

ihb

See perltoc if you don't know which perldoc to read!

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[Discipulus]: get them all printed on screen
Discipulus ;=)
[shmem]: silly question, silly answer:
[Discipulus]: i know, i know..
[shmem]: man perlfunc |perl -nle '$ok++ if /Alphabetical Listing of Perl Functions/;if($ok ){$s{$1}++if /^ (\w+)/}}{for(keys %s){$f="prototype \\\&CORE::$_"; eval"$f"||delete $CORE::{$_}}print for sort keys%CORE::'
[shmem]: well, there are some builtins which don't have a prototype...
[Discipulus]: eh eh.. i was looking in toke.c but dunno if is already used
[shmem]: oh the whitespace in the regex got condensed, meh
[shmem]: should be /^ {7}(\w+)/ or such
[shmem]: ...at least for my perldoc on Linux debian 8

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