I had been using SQL long before discovering Perl and became quite fond of the SQL *IN* operator. Not having found the equivalent in Perl, I usually construct a hash with my values as the keys. Unless something similar has already been done (and I have not discovered it yet), would this be something worth petitioning the Perl gods for?

# What I want to do
if ($value == 1 or $value == 5 or $value == 21 or $value == 99){...

# How I often do it:
my %list = (1 => 1, 5 => 1, 21 => 1, 99 => 1);
if ($list{$value}){...

# Wouldn't something like this be better?
if ($value IN (1, 5, 21, 99)){...

[download]

UPDATE: Thanks everyone. It looks like Quantum::Superpositions does what I had in mind (didn't find it initially searching CPAN). Since I'm still trying to fill the holes in my *swiss cheese* knowledge of Perl 5, I haven't looked into Perl 6 much.

In reply to *IN* Operator for the Perl wish list by hangon

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.