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Re: doing a search and replace on a large file

by hardburn (Abbot)
on Apr 14, 2004 at 13:12 UTC ( #345043=note: print w/replies, xml ) Need Help??

in reply to 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

: () { :|:& };:

Note: All code is untested, unless otherwise stated

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
    Update: reread question, you don't want to overwrite the file, so you don't want this.

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