... this could have been done via grep in clever ways ...

You may be thinking of something like: 

c:\@Work\Perl\monks>perl -wMstrict -MData::Dump -le
"my @list = (rand(1), rand(1), rand(1));
 dd \@list;
 ;;
 my $less = 1;
 for (@list) { $less = 0, last if $_ >= 0.5; }
 print 'for: all satisfy the condition' if $less;
 ;;
 my $any = grep { $_ >= 0.5 } @list;
 print 'grep: none fail the condition' if not $any;
"
[0.860137939453125, 0.796112060546875, 0.875457763671875]


c:\@Work\Perl\monks>perl -wMstrict -MData::Dump -le
"my @list = (rand(1), rand(1), rand(1));
 dd \@list;
 ;;
 my $less = 1;
 for (@list) { $less = 0, last if $_ >= 0.5; }
 print 'for: all satisfy the condition' if $less;
 ;;
 my $any = grep { $_ >= 0.5 } @list;
 print 'grep: none fail the condition' if not $any;
"
[0.134674072265625, 0.332855224609375, 0.4288330078125]

for: all satisfy the condition
grep: none fail the condition

[download]

Because grep must continue to grind through all remaining elements of the list even after it is determined that the overall condition has failed, I'm not sure I would consider this "clever." Quick and dirty, yes, and useful as such.

The for-loop approach has the advantage that it stops immediately when the overall condition is determined to have failed. The guts of List::MoreUtils  any() and  all() and their ilk are based on for-loops. An extra variable is a small price to pay.

Give a man a fish:  <%-{-{-{-<

In reply to Re: Fall through loop by AnomalousMonk
in thread Fall through loop by b4swine

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