G'day PerlSufi,

In a boolean context, any non-zero-length string evaluates to TRUE. So the grep expression will always be TRUE and @keepers will be a copy of @lines. 

$ perl -Mstrict -Mwarnings -E '
    my $match = "AZ";
    my @lines = qw{AZ SX AZ DC};
    my @keepers = grep { $match } @lines;
    say "@keepers";
'
AZ SX AZ DC

[download]

What you need to do to filter @lines, is make the grep expression a regular expression (i.e. /$match/). 

$ perl -Mstrict -Mwarnings -E '
    my $match = "AZ";
    my @lines = qw{AZ SX AZ DC};
    my @keepers = grep { /$match/ } @lines;
    say "@keepers";
'
AZ AZ

[download]

-- Ken

In reply to Re: match lines containing state abbreviation by kcott
in thread match lines containing state abbreviation by PerlSufi

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