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Think about Loose Coupling

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What I don't understand is why I get different results in this code:
use strict; use warnings; problem([1,2,3]); sub problem { print2DArray(@_); #Output: 1 2 3 reverseArray1(@_); print2DArray(@_); #Output: 1 2 3 reverseArray2(@_); print2DArray(@_); #Output: 3 2 1 } sub reverseArray1 { my @arr = @_; for my $i (0 .. $#arr) { $arr[$i] = [reverse @{$arr[$i]}]; } } sub reverseArray2 { my @arr = @_; for my $i (0 .. $#arr) { @{$arr[$i]} = reverse @{$arr[$i]}; } } sub print2DArray { for my $i (0 .. $#_) { # How does that work for the nested for lo +op? for(my $j=0;$j<scalar(@{$_[$i]});$j++){ # $#_[$i] doesn't wor +k print $_[$i][$j]," "; } print "\n"; } }
Whats the difference between
$arr[$i] = [reverse @{$arr[$i]}];
@{$arr[$i]} = reverse @{$arr[$i]};

I still am quite new to perl, and I appreciate all the comments!

In reply to Re^4: Array value changing for some reason by Silt
in thread Array value changing for some reason by Silt

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