SPUG: Chained comparisons in Perl 6

[Michael R. Wolf]

At last week's meeting, there was a question about code like this:

     if ($left < $middle < $right) { ... }

This is *not* legal Perl5 since the comparison operators are non- 
associative (contrary to my side comment at the time).  It will cause  
a compile error in Perl5, and must be written as.

     if ($left < $middle && $middle < $right) { ... }


For those who are interested in the nitty-gritty, search for "Chained  
comparisons" in this Perl6 "Spec" (FKA "Synopsis") on "Perl Operators".

     http://dev.perl.org/perl6/doc/design/syn/S03.html

Or "perldoc perlop" in Perl5.

Michael R. Wolf
     All mammals learn by playing!
         MichaelRWolf at att.net