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Recently, I finished reading Freakonomics, by Steven Levitt and Stephen Dubner. and I have to say that I really liked it!!
The book is focuses on the study of everyday aspects of life using the tools of economics and statistics. What I really liked is that the author is really trying . . . → Read More: Freakonomics Following on from my previous post about structural subtyping with recursive types, a related problem is that of minimising recursive types. Consider this (somewhat artificial) example: define InnerList as null | { int data, OuterList next } define OuterList as null | { int data, InnerList next } int sum(OuterList list): if list ~= . . . → Read More: Minimising Recursive Data Types One problem causing me a headache is how to implement [[Structural type system|structural subtyping]] for [[recursive data type|recursive types]] (which I first blogged about here). The following example illustrates the basic idea: define Link as { int data, LinkedList next } define LinkedList as null | Link LinkedList f(Link list): return list This is . . . → Read More: A Problem with Structural Subtyping and Recusive Types This latest update of Whiley is a somewhat minor increment over the previous. Aside from a number of bug fixes the main improvement is the inclusion of first-class functions (aka function pointers). Constraint checking remains disabled, as it still needs a considerable amount of work (which I’m working on 🙂 Function pointers can be . . . → Read More: Whiley v0.3.3 Released! Here’s an interesting video that I just came across (adapted from Dan Pink’s talk at the RSA), which is currently doing the rounds: The video is about what motivates people to do things and, in particular, whether or not giving people more money means they do a better job. Definitely worth a look … . . . → Read More: What Motivates Us? |
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