Re: process array with while loop

There are also other alternatives for foreach. My preferred one is map:

@array = qw(blue red orange brown);

map print, @array;
[download]

map allows you to work loops as mathematical application (or functions), and this is the closest approach to my world model.

UPDATE:Many thanks to ww, ikegami, merlyn for their comments and corrections.

-- monsieur_champs

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Re^2: process array with while loop by blahblah (Friar) on Nov 09, 2006 at 18:27 UTC
I was going to reply with "map in void context, for shame", but then I learned something!	[reply]
Re^3: process array with while loop by shawnhcorey (Friar) on Nov 10, 2006 at 15:39 UTC
Except that print is not a void context. Therefore the `map` will create a list. `#!/usr/bin/perl use strict; use warnings; my $a = ( print "Hello world\n" ); print "The answer is $a\n"; __END__` [download] See `perldoc -f print` for details.	[reply] [d/l] [select]
Re^4: process array with while loop by davorg (Chancellor) on Nov 14, 2006 at 14:04 UTC
Except that print is not a void context. I think you might be misunderstanding. blahblah wasn't talking about the call to print. He was talking about the call to map ("map in a void context"). And the call to map is in a void context - its return value doesn't go anywhere. But as he also pointed out, that's no longer a problem. Or, at least, it's not a problem from a technical point of view. I'd still argue that it's not the clearest way to write the code. -- <http://dave.org.uk> "The first rule of Perl club is you do not talk about Perl club." -- Chip Salzenberg	[reply]
Re^2: process array with while loop by chromatic (Archbishop) on Nov 09, 2006 at 19:37 UTC
What advantage does this have over `print @array;`?	[reply] [d/l]
Re^3: process array with while loop by monsieur_champs (Curate) on Nov 14, 2006 at 13:53 UTC
No advantage, I just like this construct. It can even not be the more advisable, nor the one everybody uses, but it is quite readable for me and TIMTOWTDI is important. ;-) -- monsieur_champs	[reply]


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