Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl: the Markov chain saw
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

G'day nithins,

A little more information regarding the file and the string to be replaced would have been useful. For instance, how big is the file? how many replacements are possible in the file? if more than one, how many replacements are possible per record? Also, are there any constraints such as time, memory or disk space?

Bearing in mind the unknowns, the following (pm_1069470.pl) may be suitable for your needs:

#!/usr/bin/env perl use strict; use warnings; use autodie; use Tie::File; tie my @records, 'Tie::File', 'pm_1069470.txt'; s/user={hhhfj}jshdfjhdfjh\\=/user=newvalue/ for @records; untie @records;

Sample run:

$ cat pm_1069470.txt blah blah blah user={hhhfj}jshdfjhdfjh\= whatever user=something else user={hhhfj}jshdfjhdfjh\= other data $ pm_1069470.pl $ cat pm_1069470.txt blah blah blah user=newvalue whatever user=something else user=newvalue other data

-- Ken


In reply to Re: Replace a string after a word by kcott
in thread Replace a string after a word by nithins

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, 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, 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.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others studying the Monastery: (7)
    As of 2021-04-20 07:43 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      No recent polls found

      Notices?