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Why I distrust wildcards and why we need them anyway

In any programming language that combines subtype polymorphism (object orientation) with parametric polymorphism (generics), the question ofvariance arises. Suppose I have a list of ...
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Ranges and slices

I guess we’ve all seen Dijkstra’s famous argument that a range of natural numbers should be expressed using an inclusive lower bound and exclusive upper bound, and that, ...
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Object-oriented != imperative

Dear FP community: one of the things I really like about you folks is the rigor you’ve brought to the field of programming language design. Compared to the kind of magical and ...
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The signature of reduce() in Ceylon

The Iterable interface defines a method named fold() with this signature:                         Result fold<Result>(Result ...
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On three-legged elephants

I’ve often argued that good design—of a language, library, or framework—isn’t about packing in as many features as possible into your solution, rather it’s about ...
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A paradox about typesafety and expressiveness

It’s often argued that dynamic typing is more expressive, and I am, for the most part, willing to go along with that characterization. By nature, a language with dynamic typing ...
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Ceylon 1.0.0 is now available

Today, we’re proud to announce the first production release of the Ceylon language specification, compiler, and IDE. Ceylon 1.0 is a modern, modular, statically typed programming ...
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Null and Java interop

The way Ceylon handles null is one of the big attractions of the language. Ceylon features a typed null value. The object null is just an instance of the perfectly ordinary class Null ...
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