I have a need to read N files one line at a time and then manipulate those individual lines
The diamond operator also works for this, and is much simpler, IMO.
print "Usage: $0 output input1 input2 ...\n";
my $outfile = shift @ARGV;
open(OUT, ">$outfile") || die "Can't open $outfile for writing: $!\n";
# $_ contains line
Simplicity is in the eye of the beholder, of course. YMMV.
Update: Later posts make it clear the OP wanted to process each file's line N before moving to each file's line N+1. Obviously, the diamond operator is not very useful for that behavior.
You said you wanted to be around when I made a mistake; well, this could be it, sweetheart.
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