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(redmist) Re: Reading a file

by redmist (Deacon)
on Mar 06, 2001 at 23:36 UTC ( #62560=note: print w/replies, xml ) Need Help??

in reply to Reading a file

Try this:

#!/usr/bin/perl -w use strict; open (FILE, "file.txt") or die "arrrrgh...$!\n"; while (<FILE>) { print; # pass to program here } close(FILE);
The reason you can do this is because while will read the file handle one line at a time. I am wondering what you mean by "passing it to another program." Could you just use a subroutine, or are you talking about a seperate utility?

Silicon Cowboy

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Re: (redmist) Re: Reading a file
by Ido (Hermit) on Mar 07, 2001 at 00:11 UTC
    open OUT,'|program' or die $!; open IN,'file.txt' or die $!; #if you don't need to process each line...I don't see why not printing + all the lines at once like: print OUT <IN>; #but if you must print one line at a time: while(<IN>){ #do whatever you want with the line. print OUT $_; } close OUT; close IN;

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