September 2015
Intermediate to advanced
250 pages
6h 40m
English
Content preview from Pragmatic Scala
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Type Inference
Like any statically typed language, Scala verifies types of objects at compile time. At the same time, it does not require you to state the obvious; it can infer types. You can use type inference for both simple types and generics.
Type Inference for Simple Types
We’ll first explore type inference for simple types. Let’s start with a piece of code where we indicate the type, as we’re used to doing in languages like C++ and Java:
| MakingUseOfTypes/DefiningVariableWithType.scala | |
| | val greet : String = "Ahoy!" |
We defined a variable named greet, mentioned its type is String, and gave it a value. Unlike Java, where you specify the type and then the variable name, in Scala you do the reverse—for two reasons: First, by asking us to ...
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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.