Re: process array with while loop

[monsieur_champs]

in reply to 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;

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.

[blahblah]

I was going to reply with "map in void context, for shame", but then I learned something!

[shawnhcorey]

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__

See `perldoc -f print` for details.

[davorg]

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.

[chromatic]

What advantage does this have over print @array;?

[monsieur_champs]

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. ;-)