script

[bugzpodder]

i want to write some kind of script or program that basically opens a text file, searches for a line, if it exists, change it. whats the best way to do this?

[Martin]

As in a unix shell script?

You could write a quick C++ program I imagine.

code:

#include <fstream> using namespace std; int main (int argc, char *argv[] ) {      for (int i = 1; i < argc; i++) //Since argv[0] is the program's name           searchandreplace(*argv[i]);      return 0; }

You would then run the program as "this.exe -text.txt -text2.txt -text3.txt" etc.

[rizzix]

perl.

[wtd]

rizzix wrote:

perl.

More specifically, eat your Perl pie.

code:

perl -p -i.bak -e "s/search/replace/" file1 file2 fileN

[rizzix]

mmmmm pie.

[wtd]

Works with Ruby too, and more powerfully, too.

Here's the basic conversion:

code:

ruby -p -i.bak -e "$_.gsub! /search/, 'replace'" file.txt

Now, let's say I want a count of how many replacements were made.

code:

ruby -p -i.bak -e "BEGIN{$c=0};END{$stderr.puts $c};$_.gsub! /search/ do $c += 1;'replace' end" file1 file2 fileN

[md]

martin, your program should be passes text1.txt, not -text1.txt unless the file is called -text1.txt

[Martin]

Sorry, I was high on crack when I wrote that.