From: Yohanes Santoso <ysantoso@...>
Date: 2002-03-09T08:13:00+09:00
Subject: Re: Text stuff and appending to a file

bobx@linuxmail.org (Bob) writes:

> Wyss Clemens <WYS@helbling.ch> wrote in message news:<2121D3CBCBE8D111B2C200805F0DF903F6AFD1@HTKA60MS01NT>...
> > lines = File.readlines(ARGV[0])
> > # create a file to append data found from the input file
> > logfile = File.open("badwords.txt", "w+")
> > # search for a word and print the entire line
> > lines.each { | line  |
> >    if /bob/i =~ line  
> >      print line
> >      logfile.write(line)
> >    end
> > }
> Very good! It does indeed do it! Now...since these are very large
> files (40-60MB)...is this the best way to read them in?

That's quite a large file. Instead of reading everything to memory,
how about reading one line at a time:

# create a file to append data found from the input file
logfile = File.open("badwords.txt", "w+")
# search for a word and print the entire line
File.open(ARGV[0]) { |file|
  file.each_line { |line|
    if /bob/i =~ line
       print line
       logfile.write line
    end
  }
}

Also consider using ruby 1.7 which has a much improved IO from what I
heard.

YS.