This does a part of the job except

> I would ignore the case where the two keys are the same.

... because I doubt this will lead to any predictable results anyway (sorting matters).

use strict;
use warnings;
use Data::Dump qw/pp dd/;


my $h_orig =
  {
  '/a/b/c/dt/data/SUSE/tool/0.9.0' => '/a/b/c/dt/tools/SUSE/tool/0.9.0
+',
  '/nfs/us/tools/SUSE12' => '/usr/bin',
  '/a/b/c' => '/p'
  };


my $pattern = join "|", map quotemeta, keys %$h_orig;

my %copy = %$h_orig;

s/^($pattern)/$h_orig->{$1}/g
  for values %copy;

pp $h_orig, \%copy;

[download]

    
-*- mode: compilation; default-directory: "d:/tmp/pm/" -*-
Compilation started at Sat Feb  5 21:29:56

C:/Strawberry/perl/bin\perl.exe -w d:/tmp/pm/replace_patl.pl 
(
  {
    "/a/b/c" => "/p",
    "/a/b/c/dt/data/SUSE/tool/0.9.0" => "/a/b/c/dt/tools/SUSE/tool/0.9
+.0",
    "/nfs/us/tools/SUSE12" => "/usr/bin",
  },
  {
    "/a/b/c" => "/p",
    "/a/b/c/dt/data/SUSE/tool/0.9.0" => "/p/dt/tools/SUSE/tool/0.9.0",
    "/nfs/us/tools/SUSE12" => "/usr/bin",
  },
)

Compilation finished at Sat Feb  5 21:29:57

[download]

Cheers Rolf
(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery

In reply to Re: Replacing substrings with links by LanX
in thread Replacing substrings with links by ovedpo15

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.