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Re^2: if,if and again,if

by Tanktalus (Canon)
on Aug 23, 2012 at 17:57 UTC ( #989363=note: print w/replies, xml ) Need Help??


in reply to Re: if,if and again,if
in thread if,if and again,if

Data-driven approaches FTW!

Though I'd be tempted to do things a bit more perlishly (at least for my own definition of perlish):

my @matchers = ( [ qr/(Lz0|PLATO)/i => 'Apps' ], ... ); for my $check (@matchers) { if ($release_name =~ $check->[0]) { $category = $check->[1]; print "[INFO] Category: $category\n"; last; } }
Actually, a bit more perlish, IMO, would be to replace that for loop altogether:
use List::Util qw(first); my $category = map { $_ ? $_->[1] : undef; } first { $release_name =~ $_->[0]; } @matchers; if ($category) { print "[INFO] Category: $category\n"; } else { print "[ERROR] Unrecognised release type: $release_name\n"; }
But maybe that's just me. :-)

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Re^3: if,if and again,if
by moritz (Cardinal) on Aug 23, 2012 at 18:04 UTC

    If we go all perlish, I'd get rid of the ugly map with a ternary :-). Either

    my $category = first { ... } ... ; if ($category) { $category = $category->[1]; print "[INFO] Category: $category\n"; }

    Or if you insist on a map on a one-element list, write it as

    map $_->[1], grep $_, first { .... } ...;

    IMHO several simple operations are easier to read than a few complicated ones.

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