in reply to check if an element exists in array

If all you want to do is check if the name is in the list then a hash is the way to go. But, to search an AoA, you could use grep: 
my @names = (
    [ qw/Jim     12/ ],
    [ qw/John    15/ ],
    [ qw/Peter   08/ ],
    [ qw/Andrew  34/ ],
    [ qw/Jim     57/ ],
    [ qw/Andreas 27/ ],
);

my $name = 'Jim';

#simple searching
if ( grep { $_->[0] eq $name } @names ) {
    print "$name\'s in the list\n";
}

# or to get all of $name's entries
for ( grep { $_->[0] eq $name } @names ) {
    print "@$_\n";
}

[download]

Output: 

Jim's in the list
Jim 12
Jim 57

[download]

Unless I state otherwise, my code all runs with strict and warnings

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Re^2: check if an element exists in array
by Anonymous Monk on Apr 19, 2008 at 09:13 UTC
    I wanted to use a hash, but how will I build it? I do not have unique names...
[reply]
      Using @names as before... 
      my %names_h = map { $_->[0] => 1 } @names;
#             map { @$_ } @names; # similar, but more scary

my $name = 'Jim';

print "Jim's in the hash\n"
  if $names_h{$name};

      [download]

      Unless I state otherwise, my code all runs with strict and warnings
[reply]
[d/l]
[select]
        Thank you all, I seem to be close...
        But if I go with grep as you suggest, I DO find the names, but how do I print the numbers as well? I tried with $_->1 but didn't work...
[reply]

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