erikharrison is dead on. In order for your
existing program to work, you really have to open a temp
file, write to it, then clob the first file by moving the
temp file over the first file:
use strict;
use IO::File;
my $in = IO::File->new;
my $out = IO::File->new;
my $change_on = "FChangeBar Yes";
my $change_off = "FchangeBar No"; # hmmm, lower case c?
$in->open('test.mif') or die "can't read input";
$out->open('>tmp.mif') or die "can't write output";
while (<$in>) {
s/$change_on/$change_off/g;
print $out $_;
}
$in->close or die "can't close input";
$out->close or die "can't close output";
rename('tmp.mif','test.mif') or die "can't rename";
Here is a much cooler version that uses Tie::File:
use strict;
use Tie::File;
my @file;
tie @file, 'Tie::File', 'test.mif' or die "cannot tie file";
s/(FchangeBar )Yes/$1No/g for @file;
But, you might not be able to incorporate this into your
ending program. At any rate, you are welcome and good luck!
:)
jeffa
L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|