I had need of this recently, but the syntax is overly complicated. The use of code refs is unnecessary.
{
my @nums = (0..9,'a'..'z','A'..'Z');
my %nums = map { $nums[$_] => $_ } 0..$#nums;
sub to_base
{
my $base = shift;
my $number = shift;
return $nums[0] if $number == 0;
my $rep = ""; # this will be the end value.
while( $number > 0 )
{
$rep = $nums[$number % $base] . $rep;
$number = int( $number / $base );
}
return $rep;
}
sub fr_base
{
my $base = shift;
my $rep = shift;
my $number = 0;
for( $rep =~ /./g )
{
$number *= $base;
$number += $nums{$_};
}
return $number;
}
}
You examples becomes
my $UniqueID = to_base( 62, $$ ) . to_base( 62, time );
print to_base( 16, 28 );
If you need your original syntax for some reason, just add
sub GenerateBase
{
my $base = shift;
return (
sub { to_base( $base, $_[0] ) },
sub { fr_base( $base, $_[0] ) },
);
}
Then the user has the choice of syntax at no cost.
