Code examples here are a base for my presentation to Java fellows. This presentation is about to show Scala in possibly fast way allowing you to get your hands dirty. There is no aim to cover everything extensively, but give enough to understand the concept.
Whilst working on it, I got an idea this code can be a good introduction for people coming to Scala from other languages, that's why you will find short comments explaining the code. It's hard to find such concise resources around the web so it's worthwhile to make one. Maybe except cheat sheets but they are too short and you can't play with them!
Examples are run on test specification so install SBT and from command line
run all tests with tests or single one with ~testOnly *.MethodsAndFunctionsSpec
You can paste code to REPL too (with :paste command) or
from sbt run with main app with runMain eu.gruchala.scala.Main and play around.
Feel free to join forces, update code, add more things. We can talk at
- definitions: Pure function, referentially transparent
- argument pass by value/by name
- function literals
- val vs var vs def vs lazy val
- equality
- partial functions
- partially applied functions
- case classes
- classes and companion objects
- default values
- value classes
- objects
- traits
- multiple traits inheritance
- function composition
- pattern matching
- recursion / tail recursion
- for comprehensions
- implicits (function arguments, functions, implicitly)
- underscore use cases
- Future
- Try
- Either
- type variances
- Promise
- More functional examples
- you name it
More advanced topics covered in another repo: typelevel-programming-scala
MIT License