Hi, I'm trying to convert a Perl regex script to Ruby and I'm not sure how to
do one little thing..
I have a csv file that has newline characters (^M aka \r\n) in the middle of
the lines. My Perl script that fixes this is:
foreach $file (@ARGV) {
open(IN,"$file") or die "can't open $file : $!";
@f=<IN>;
$f=join("",@f);
$f=~s/[\r\n](?!BOB|JOE)//mg;
open(OUT,">$file") or die "can't open $file for writing : $!";
print OUT $f;
}
Where BOB and JOE are the only two strings that are expected to start a line.
Basically it's checking for a newline that isn't followed by either BOB or JOE
and deleting them. I'm sure there are other ways to accomplish this, but it
works. So now I'm trying to do this in Ruby, and have the following code so
far:
ARGV.each do |filename|
open(filename, "r+") do |f|
lines = f.readlines
lines.each do |it|
it.gsub!(/[\r\n](BOB|JOE)/m,'')
end
f.pos = 0
f.print lines
f.truncate(f.pos)
end
end
And of course I've tried some variations of it. I'm just not sure what to use
for the lookahead that the "(?" accomplishes in the Perl script.
Thanks for any help.
Bryan
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