September 22, 1999

Strong Typing

Slide #36

Compile-Time Type Checking

Data structure:

        $octopus = 
          [ { tentacles => 1, hearts => 2, favorite_food => 3 },
            8,
            3,
            "crab cakes",
          ];

Usage:

        $octopus->{tentacles};             # Yields 8

        $octopus->{noses} = 1;             # Run-time error

                No such array field at ...