Lecture F2 INF5510 2017-01-24 Perl 14.15 - 16 Review of F1 including type system Revisit of contra-variance via the pizza-junk heap-bank example in the SPE article Short introduction to the object model: sea of objects and to the distribution model: dividing the sea of objects into disjunct parts. Arrays in Emerald - a walk thru of the Array.m implementation of dynamic arrays in Emerald. Immutable types motivation, intro explanation. Evaluation, see whiteboard picture.