Given the string: 'A B 1 2 3 4 5 6 7 8 9'
I want to put a semicolon between all the digits, replacing the space.

So, I want to get: 'A B 1;2;3;4;5;6;7;8;9'.

I coded in the file s.pl:

#!/usr/bin/perl -w
use strict;
while(<>) {
    my $row = $_;
    $row =~ s/(\d)\s+(\d)/$1;$2/g;
    print $row;
} # while

[download]

then:

echo 'A B 1 2 3 4 5 6 7 8 9' | perl s.pl

returns:

A B 1;2 3;4 5;6 7;8 9

which is not what I expected...

Can somebody please tell me how to correct the s/// statement to get the expected result?

Thanks a lot.

Hilbert

In reply to Beginner question about search and replace by hilbert

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.