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Re: Random entry from combined data set

by damian1301 (Curate)
on Jul 04, 2001 at 07:10 UTC ( [id://93759] : note . print w/replies, xml ) Need Help??

in reply to Random entry from combined data set

Hmmm... what you could do is open each file and push (line by line) it in a single array.

open(FH,"$file1") or die " Could not open $file1!!! Here's why: $!"; push @array, <FH>; close FH or die "Could not close $file1. Here's why: $!";

Etc, etc. Then once you have all the files in a you can use a simple line to select a random phrase.

print $array[rand(@array)]; # just for you, meowchow :)
note: This could drain some memory so be careful. Also, it would probably be much more efficient if you made a subroutine to open the files and return the data to you. That way you won't have so many open calls all the time. I will post an example in a bit.

UPDATE:Got the sub.
sub openf{ my $file = shift; open(FH,$file) ||die"There's a problem! Here's what's up: $!"; my @array = <FH>; close FH ||die"There's a problem! Here's what's up: $!"; @array=grep{$_ ne ""} @array; return @array; } push @array,openf("test2.txt"),openf("test.txt"); print $array[4];

UPDATE2: Use wog's advice, as his does not drain memory and has the same functionality as mine...but shorter.

UPDATE3: I don't know why but I felt that push @bla,$_ while <FH>; was the best I am stoopid tonight... thanks dvergin.

$_.=($=+(6<<1));print(chr(my$a=$_));$^H=$_+$_;$_=$^H; print chr($_-39); # Easy but its ok.

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Re: Re: Random entry from combined data set
by dvergin (Monsignor) on Jul 04, 2001 at 07:46 UTC
    Actually, you don't need to:

          push @array,$_ while <FH>;

    'push' takes a list as its second parameter, so:

          push @array, <FH>;

    for each file works fine.