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Showing posts from August, 2015

Lambdas in Java 8 - (Dys)functional Interfaces

1970 - Guy Steele and Gerald Sussman create Scheme. Their work leads to a series of "Lambda the Ultimate" papers culminating in "Lambda the Ultimate Kitchen Utensil." This paper becomes the basis for a long running, but ultimately unsuccessful run of late night infomercials. Lambdas are relegated to relative obscurity until Java makes them popular by not having them.
James Iry A Brief, Incomplete, and Mostly Wrong History of Programming Languages

So we finally have lambda expressions in Java with Java 8. Well, actually we have had them for a year now, and companies and universities have started upgrading at a snail’s pace. Some from Java 6 to Java 7, but let’s ignore that for now and instead talk about lambdas, implementation details, and how this all impacts j2objc and you.

Before we talk about lambdas we have to talk about functional interfaces, and after we talk about functional interfaces we will need to mitigate confusion with history, with a short lambda ances…