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bugzpodder

Mon Jan 03, 2005 10:06 am


script

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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?


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Martin

Mon Jan 03, 2005 2:41 pm



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As in a unix shell script?

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

#include 
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.


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rizzix

Mon Jan 03, 2005 3:08 pm



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perl.


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wtd

Mon Jan 03, 2005 3:24 pm



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perl.

More specifically, eat your Perl pie.

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


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rizzix

Mon Jan 03, 2005 3:24 pm



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mmmmm pie.


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wtd

Mon Jan 03, 2005 3:35 pm



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Works with Ruby too, and more powerfully, too.

Here's the basic conversion:

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

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

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


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md

Tue Jan 11, 2005 3:12 pm



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


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Martin

Tue Jan 11, 2005 3:14 pm



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