September 2015
Intermediate to advanced
250 pages
6h 40m
English
Content preview from Pragmatic Scala
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Function Values with Multiple Parameters
In the previous example, the function values received one parameter. Function values can receive zero or more parameters. Let’s take a look at a few examples to learn how to define function values with different numbers of parameters.
In its simplest form, a function value may not even receive any parameter, but may return a result. Such a function value is like a factory—it constructs and returns an object. Let’s take a look at an example of defining and using a zero parameter function value:
| | def printValue(generator: () => Int) = { |
| | println(s"Generated value is ${generator()}") |
| | } |
| | |
| | printValue(() => 42) |
For the method printValue function, we’ve defined the parameter generator as a function ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.