fc should be used for case-insensitive comparisons, not lc

Do you have a usage example for "fc" that actually works ?

I certainly don't. On Win32 perls 5.24.0, 5.26.0, 5.27.8 and Ubuntu perl 5.26.0 (all of which provide documentation for the fc function), I tried the following script: 
use strict;
use warnings;

my $this = 'hello';
my $that = 'tata';

if(fc($this) eq fc($that)) {print "wtf\n"}

[download]
In every case it simply output: 
Undefined subroutine &main::fc called at try.pl line 7.

[download]


Update Aah .. you have to use feature 'fc'; to enable it.
(Clearly stated at the very end of the documentation.)
I personally would not recommend anything that requires feature to be enabled.

Cheers,
Rob

In reply to Re^3: Can we make hash key check in 'if' condition case insensitive? by syphilis
in thread [SOLVED: Can we make hash key check in 'if' condition case insensitive? by Perl300

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.