For those getting here through the Google terms "element exists in array perl", here's a simple routine I wrote because I wanted something similar to TCL's "lsearch -exact" but with a binary return: 
# Checks if a provided element exists in the provided list
# Usage: isInList <needle element> <haystack list>
# Returns: 0/1
sub isInList {
    my $needle = shift;
    my @haystack = @_;
    foreach $hay (@haystack) {
        if ( $needle eq $hay ) {
            return 1;
        }
    }
    return 0;
}

[download]
Of course, this should only be used on small haystacks (a few hundred elements at most).

In reply to Re: check if an element exists in array by RecursionBane
in thread check if an element exists in array by Anonymous Monk

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.