s/frog/toad/g txtfile

[download]
won't work inside a perl script. It works from the command line because "txtfile" is actually be handed to the mini-script created by using 'perl -i.bak -pe 's/frog/toad/g'. Use 'perl --help' to see what -i -p and -e mean. This sounds a lot like a homework assignment, but here is one solution: 
#!/usr/bin/perl -w
use strict;

# this script will edit itself
ReplaceStuff($0,'word','taco');

sub ReplaceStuff{
  my ($file,$origword,$newword) = @_;
  local $^I="";        # set the backup tag to nothing
  local @ARGV = $file; # make a local @ARGV so we can use <>
  # go through each line and do the substitution
  while (<>) {
    s/$origword/$newword/g;
    print;             # print stuff out
  }
}

[download]

In reply to Re: Re: Re: substitute a word in the whole file .. how ??? by fletcher_the_dog
in thread substitute a word in the whole file .. how ??? by star7

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.