Whereas in idiomatic Perl, you'll typicall see things like the following: 
for ( 0 .. 19 ) {
    print "$_\n";
}

[download]

... with the reminder that ( 0 .. 1000000 ) would put an undue strain on your machine's memory as it generates all million (plus one) numbers in a list. And if you have two nested loops, you have to do the 'hot potatoe' thing with $_ so that its value doesn't get overwritten. 

for ( 0..7 )
{
  my $Col = $_;  #  Eek! Save $_ otherwise this value is lost
  for ( 0..7 )
  {
    # Do something in an 8x8 matrix.
    if ( $Matrix[ $Col ][ $_ ] == 4 ) ...
  }
}

[download]
It's a matter of preference .. I would rather just write 
for ( my $Col = 0; $Col < 8; $Col++ )
{
  for ( my $Row = 0; $Row < 8; $Row++ )
  {
    # Do something in an 8x8 matrix.
    if ( $Matrix[ $Col ][ $Row ] == 4 ) ...
  }
}

[download]
But that's my years of C programming colouring my view of Perl.

--t. alex

"Of course, you realize that this means war." -- Bugs Bunny.

In reply to Re: (Ovid) Re: Newbie realisation about by talexb
in thread Newbie realisation about by Cody Pendant

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