Re: doing a search and replace on a large file

That's a one-liner, provided your pattern is reasonably small. You don't need to open filehandles if you use perl's command line options and the shell to your advantage:

perl -lne 'print if /pattern here/' old_file.txt > new_file.txt
[download]

----
: () { :|:& };:

Note: All code is untested, unless otherwise stated

Comment on Re: doing a search and replace on a large file Select or Download Code

Replies are listed 'Best First'.
Re: Re: doing a search and replace on a large file by eXile (Priest) on Apr 14, 2004 at 14:01 UTC
Or, if you want to overwrite the file use the '-i' cmdline option for in-place editting: `perl -pi -e's/pattern here//g' file` [download] Update: reread question, you don't want to overwrite the file, so you don't want this.	[reply] [d/l]


laziness, impatience, and hubris
	PerlMonks