Uh... well, yeah, it is a new example of something.

Please share the 'of what' as I can't see the relevance in a thread devoted to encoding/decoding utf8.

Oh, yes. When I print the part you've labeled as non-printing, I see this: 

#!/usr/bin/perl
use strict;
use warnings;
# 1046930

my $string = "This is what you have" . "\n";;
print $string;

#this part does not print:

substr($string, 5, 2) = "wasn't";         #change "is" to "wasn't"
print $string . "\n";

substr($string, -12) = "ondrous";        #"this wasn't wondrous"
print $string . "\n";


substr($string, 0, 1) = "";            #delete first character
print $string . "\n";


substr($string, -10) = "";            #delete last 10 characters
print $string . "\n";


#printing problem end here


=head out:

This is what you have
This wasn't what you have

This wasn't whondrous
his wasn't whondrous
his wasn't

=cut

[download]

...which is at some variance with what your comments suggest you expected.

If I've misconstrued your question or the logic needed to answer it, I offer my apologies to all those electrons which were inconvenienced by the creation of this post.

In reply to Re: 5.pl i have another new example by ww
in thread a new example by Raymond

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.