2009/12/10 Sebastian Sylvan <sebastian.syl...@gmail.com>: > I think laziness requires purity to make sense. Laziness implies that the > order of evaluation is highly unpredictable and depends strongly on the > implementation details of libraries and such (which you may not have access > to). So it's fickle. Someone adds an if statement somewhere and all of a > sudden a variable gets evaluated earlier than it used to. It would be > madness to write any code which depends on this unpredictable behaviour. In > other words, the expressions that get evaluated lazily must not have side > effects. > -- > Sebastian Sylvan >
+1 This unpredictability has bit me a few times when using LINQ (which is awesome and has lazy evaluation) with C#. -- Deniz Dogan _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
