November 2005
Intermediate to advanced
304 pages
6h 14m
English
Content preview from Wicked Cool Java
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Funkier Functors: Using Composite Functors
In the previous section, we used functors to filter the input to a for loop, thereby removing any need for filtering code in our processing loop. JGA has utilities for creating composite
functors
, and they are automatically built into every unary and binary functor. A UnaryFunctor has a compose method
that returns a new functor that is a composition of an inner functor. When you see the compose method, think about the word of: f.compose(g) is like saying "f of g." In other words, you can create a functor ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.