Re^2: How to swap rows with columns?

Isn't this so much easier to understand?

#!/usr/bin/perl
use warnings;
use strict;

my @in = ([1,2,3,4,'a','b','c'],
          ['z','y','x','w',9,8,7],
          ['e','f','g','h',5,4,6],
          );
my @out;

for my $y (0..(@in-1)) {
    for my $x (0..(@{$in[$y]}-1)) {
        $out[$x][$y] = $in[$y][$x];
    }
}
[download]

No need to be a Perl geek to do this right! And think of the ease of maintenance!

Comment on Re^2: How to swap rows with columns? Download Code

Replies are listed 'Best First'.
Re^3: How to swap rows with columns? by johngg (Canon) on Oct 09, 2007 at 22:11 UTC
`for my $y (0..(@in-1)) { for my $x (0..(@{$in[$y]}-1)) {` [download] I'm puzzled as to why you do the subtractions to find the upper bound of the arrays rather than use the `$#array` that Perl provides. `for my $y ( 0 .. $#in ) { for my $x ( 0 .. $#{$in[$y]} ) {` [download] Cheers, JohnGG	[reply] [d/l] [select]
Re^4: How to swap rows with columns? by snopal (Pilgrim) on Oct 10, 2007 at 02:14 UTC
My original did, but the second loop definition was looking like line noise and I was demonstrating the practice to a novice. So I opted for the more verbose, and less obtuse example.	[reply]


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