Hello haukex,

have you decided to consume all our spare times!?! ;)

Not golfed but maybe of interest 

perl '-M0;map{$h{$_}++}97..122;@a=map{chr$_}keys%h;$"=""' -pe 'eval"tr
+/0-9/@a[0..9]/"' input.txt

[download]
WebPerl link (requires haukex ;)

L*

UPDATE see it running

perl '-M0;$h{$_}++for 97..122;$"=""' -pe 's/(\d)/(map{chr$_}keys%h)[$1]/eg' input.txt

removing unneeded assignemnts..

perl '-M0;$h{$_}++for 97..122' -pe 's/(\d)/(map{chr$_}keys%h)[$1]/eg' input.txt

or even..

perl '-M0;@h{97..122}=1x125' -pe 's/(\d)/(map{chr$_}keys%h)[$1]/eg' input.txt

...

perl '-M0;@h{97..122}=1x125'-pe 's/\d/(map{chr$_}keys%h)[$&]/eg' input.txt

...

perl '-M0;@h{97..122}=1x125'-pe 's/\d/chr((keys%h)[$&])/eg' input.txt

...

perl '-M0;undef@h{97..122}'-pe 's/\d/chr((keys%h)[$&])/eg' input.txt

..stop!

perl '-M0;@h{97..122}=1'-pe 's/\d/chr((keys%h)[$&])/eg' input.txt

L*

congrats Eily for the below reduction!

another variation, not highly random..

perl -pe 's/\d/(a..z)[$&-(split"",time)[-1]]/eg' input.txt

or.. (shorter than Eily's one ;)

perl -pe 's|\d|(a..z)[$&-time%7]|eg' input.txt

after haukex's suggestion:

perl -pe 's|\d|(a..z)[$&-$^T%7]|eg' input.txt

L*

There are no rules, there are no thumbs..
Reinvent the wheel, then learn The Wheel; may be one day you reinvent one of THE WHEELS.

In reply to Re: A little golfing challenge: replace digits by random letters (updated) -- oneliner by Discipulus
in thread A little golfing challenge: replace digits by random letters by haukex

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.