A hash consists of key, value pairs. Only keys can be tested for whether or not they exist, as shown in this snippet:

use Data::Dumper; my %WORD = ('AALIYAH', 'AARON', 'ABBE' , 'ABBEY', 'ABBI', 'ABBIE', 'ABBIGAIL', 'A +LEX'); print Dumper(\%WORD); __DATA__ $VAR1 = { 'ABBI' => 'ABBIE', 'ABBIGAIL' => 'ALEX', 'AALIYAH' => 'AARON', 'ABBE' => 'ABBEY' };

You should be using a hash slice instead.

my @names = ('AALIYAH', 'AARON', 'ABBE' , 'ABBEY', 'ABBI', 'ABBIE', 'A +BBIGAIL', 'ALEX'); my %WORD; @WORD{@names} = (); ...

Take a look at perldoc perldata for more information on the wonderful data structures in perl as well as some nifty tricks that can be performed upon them.

Hope this helps.

antirice    
The first rule of Perl club is - use Perl
The
ith rule of Perl club is - follow rule i - 1 for i > 1


In reply to Re: Exists in HASH issue by antirice
in thread Exists in HASH issue by wsee

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.