Scala Pattern Matching

Functional Scala: Pattern Matching – the basics « brain driven


I was whining recently about how my scala-code is java in poor disguise. I started reading the scala by example pdf that also comes with the scala Scala has a language feature to support disjunctions in pattern matching ('Pattern Alternatives'). x match { case _: String | _: Int => case _ => } They also encounter pattern matching as both a new and (relatively) powerful concept Can I get around this in Scala using the examples above, or is there more
Functional Scala: Pattern Matching – the basics « brain driven

The Code General | Ramblings of a Software Developer


The Gist. Pattern Matching gives a very gentle introduction to Scala’s match and case keywords. My Interpretation. Scala’s match keyword is akin to Java’s Scala has many beautiful features which I’m absolutely in love with: closures, currying of functions, functions as first class objects, higher order As we will see in the section called “Unapply” in Chapter 6, Advanced Object-Oriented Programming In Scala, the pattern matching examples we have shown use unapply
The Code General | Ramblings of a Software Developer

Monster Sandwich


Scala has taken the traditional for-construct and put it on steroids. One of the interesting features is the ability to use pattern matching as part of a for expression. Scala has pattern matching so what's the big deal? If you are a Java developer the power of pattern matching will probably be lost on you at first, but after you (the answer is: Scala throws an exception) This really doesn’t seem all that compelling as a means of encapsulating return values. That is why pattern matching is more
Monster Sandwich

Pattern Matching in Scala distilled » Scalabound


Scala extractors provide a nice way to use pattern matching on common Java objects. In this post I'm going to show a simple use of extractors with Java Pattern Matching in Scala — Presentation Transcript. Derek Chen-BeckerPattern Matching in Scala DOSUG IgNite Presentation The primary motivation of Visitor design pattern is to separate model traversal from operational logic. A visitable model takes the responsibility of model navigation
Pattern Matching in Scala distilled » Scalabound

Scala School – Pattern matching & functional composition


Scala has a built-in general pattern matching mechanism. It allows to match on any sort of data with a first-match policy. Here is a small example which shows how to Welcome to another episode of Functional Scala! This time, we’ll finally discover how to pattern match on product types. Within the last episodes we saw This lesson covers: Functions (again) compose; andThen; PartialFunctions range and domain; composition with orElse; Pattern Matching extractor methods
Scala School - Pattern matching & functional composition

Scala Quick Guide – Tutorials for Scala, Spring, Struts 2, HTML5


How many times have you been stuck in your frustration because you were unable to use strings as entries in switch-case statements. Such an ability would Looks like you don't care about the values of the String parameters, and want to treat B and C the same, so: def matcher(l: Foo): String = { l match { case A() => "A We think it makes the most sense to approach teaching Scala not as if it's an apply, update, Functions are Objects (uniform access principle), pattern matching.
Scala Quick Guide - Tutorials for Scala, Spring, Struts 2, HTML5

scala.Option Cheat Sheet « λ Tony’s Blog λ


As the name suggests, pattern matching enables the checking of a sequence of tokens for the presence of the same pattern. Beyond the Scala language, pattern matching Scala supports the notion of case classes. Case classes are regular classes In our example, the function print is expressed as a pattern matching statement starting However, the evaluations can serve for validating Scala’s constructs for pattern match-ing. They show that case classes and extractors together perform well in all of
scala.Option Cheat Sheet « λ Tony’s Blog λ

Learning Scala – Software gems and tools picked up while learning


Welcome to another episode of functional Scala! Within the last episodes, we discovered how to define so called algebraic datatypes. So far, we’ve only The use case is pretty straight forward, you have a string of data and you want to extract values out of the string based on a pattern. An example would be First, we get the java.util.regex.Pattern object associated with our scala.util.matching.Regex object. scala> Name.pattern res16: java.util.regex.Pattern = (Mr
Learning Scala - Software gems and tools picked up while learning

Pattern matching – Wikipedia, the free encyclopedia


Martin Odersky talks with Bill Venners and Frank Sommers about the mechanics and purpose of pattern matching in Scala. I’ve been trying to use Scala more and more so I can gain some experience and exposure to it. A couple of weeks ago, I wrote a Scala log parser for Ruby on Rails. As I dig further into scala, I begin to see the utility of certain language features when designing a library API. For example, partial functions are a
Pattern matching - Wikipedia, the free encyclopedia