Beefy Boxes and Bandwidth Generously Provided by pair Networks
Welcome to the Monastery

Re: Merging files, 1 line for every 10

by Kc12349 (Monk)
on Sep 06, 2011 at 22:45 UTC ( #924479=note: print w/ replies, xml ) Need Help??

in reply to Merging files, 1 line for every 10

I'm with others here wondering what possible purpose this serves, but I would probably do something like the below. $in_file1 being the larger of the two files.

open($in_fh1, '<', $in_file1); open($in_fh2, '<', $in_file2); open($out_fh, '>', $out_file); while (my $line1 = <$in_fh1>) { chomp($line1); state $i; $i++; say {$out_fh} $line1; unless ($i % 10) { chomp(my $line2 = <$in_fh2>); say {$out_fh} $line2 if $line2; } }

Comment on Re: Merging files, 1 line for every 10
Download Code
Replies are listed 'Best First'.
Re^2: Merging files, 1 line for every 10
by trizen (Hermit) on Sep 07, 2011 at 21:59 UTC
    I'd recommend a simpler code:
    open my $in_fh1, '<', $in_file1; open my $in_fh2, '<', $in_file2; open my $out_fh, '>', $out_file; while (defined(my $line1 = <$in_fh1>)) { print {$out_fh} $line1; unless ($. % 10) { my $line = <$in_fh2>; print {$out_fh} $line; } }

      The use of $. does make things more simple. I'll have to take note of that for similar situations in the future. What is the benefit of the added defined call?

        It deals with the edge case where $line gets a value that is false before the actual end of file.

        True laziness is hard work

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://924479]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others romping around the Monastery: (4)
As of 2015-11-29 12:34 GMT
Find Nodes?
    Voting Booth?

    What would be the most significant thing to happen if a rope (or wire) tied the Earth and the Moon together?

    Results (750 votes), past polls