Alejandro is raising funds for ScalaQuest - a game to learn Scala on Kickstarter! An online game to learn Scala. Scala for Spark - map , flatMap and reduce Just Enough Scala for Spark (Dean Wampler 23:31. There are times we might only be interested in accessing the value(& not key). Color is more orange than red with floral inside lining. 23, "How to Sort an Existing Map by Key or Value" Problem. Answers for la scala site crossword clue. fold instead of Option. ☀ Up To 50% Off Beach Lawn Chairs ☀ La Scala Beach Chair by Tropitone At Your Doorstep Faster Than Ever. This is a little more convoluted, but still possible: [cc lang=’scala’] /** * note we need a recursive definition of F as a subtype of Functor * because we need to refer to it in the return type of. While doing so we needed a way to convert nested Scala Map's into JSON generically. 196 reviews of La Scala Restaurant "Favorite restaurant ever for 30+ years. Battle Goblins and Wizards and face all kinds of challenges while learning a new programming language. There is admittedly some truth to the statement that "Scala is hard", but the learning curve is well worth the investment. Let's have some code examples of immutable Map. toMap //a little explanation on how the. it is approx. As I mentioned, fold, foldLeft and foldRight share many concepts in common and we have already gone through some of their applications. One thing to have in mind: symbols in Scala pre-2. The most Scala families were found in the USA in 1920. Map? Ask Question Asked 8 years, 9 months ago. Scala has a lot of capabilities not in Java, and to help those new features work more nicely, there are a number of differences between Java and Scala syntax that can make reading Scala code a bit of a challenge for Java programmers when first encountering Scala. (Spark can be built to work with other versions of Scala, too. Subscribe now. When you have eliminated the JavaScript , whatever remains must be an empty page. Since scala follows most aspects of functional programming hence map in scala might seem somewhat similar to Relation and Mapping in mathematics. scala,shapeless,type-level-computation. The Scala family name was found in the USA, the UK, Canada, and Scotland between 1841 and 1920. Scala Map – Objective. #la-scala-stacking-patio-dining-chair-by-tropitone #Custom-Patio-Dining-Chairs , Shop Custom Patio Dining Chairs with Save Big on Quality Furniture. What is the syntax for adding an element to a scala. It stores elements in pairs of key and values. Open full screen to view more. A Thread takes a Runnable. The spiral staircase most impressive and valuable in Venice. ☀ Deal Shop Custom Patio Chaise Lounges ☀ La Scala Reclining Chaise Lounge by Tropitone Over 7 Million Items. 13, "How to Create Maps in Scala" Like maps in other programming languages, maps in Scala are a collection of key/value pairs. Map[String,Int] = Map((steve,100), (bob,101), (joe,201)). The old world meets the new at Scala’s Bistro, located next to San Francisco’s landmark Kimpton Sir Francis Drake Hotel. Install Scala on your computer and start writing some Scala code! Tour of Scala. Scala has a rich collections library. The Scala Contarini del Bovolo (also called Palazzo Contarini Minelli dal Bovolo) is a small palace in Venice. GraphX is the Apache Spark component for graph-parallel computations, built upon a branch of mathematics called graph theory. This What is Scala Article will help you with a comprehensive approach to Scala Programming language with the help of examples on every topic in Scala. In this light, SCALA is a digest of 52 of the most relevant buildings from the last 25 years, from five continents and more than twenty countries. #la-scala-reclining-chaise-lounge-by-tropitone #Custom-Patio-Chaise-Lounges , Shop Custom Patio Chaise Lounges with Get Up to 70% OFF Every Day, Plus Bulk Discounts and Personalized Service. Scala snippets 3: Lists together with Map, flatmap, zip and reduce December 04, 2014 5 minute read. The map method takes a predicate function and applies it to every element in the collection. ScalikeJDBC Just write SQL and get things done! ScalikeJDBC is a tidy SQL-based DB access library for Scala developers. Most first-time visitors to Milan reach the square. This is an excerpt from the Scala Cookbook (partially modified for the internet). Introduction. classutil (ClassUtil) library is a Scala package that provides various class location and class generation capabilities, including:. 23, "How to Sort an Existing Map by Key or Value" Problem. ★2015 Spring Scala Wall Soap Dish By ZACK™ >> If you are looking for 2015 Spring Scala Wall Soap Dish By ZACK Yes you see this. Shop Furniture, Home Décor, Cookware & More! 2-Day Shipping. This post will help you get started using Apache Spark GraphX with Scala on the MapR Sandbox. In this text I will just explain the exception handling mechanisms briefly. Scala source code is intended to be compiled to Java bytecode, so that the resulting executable code runs on a Java virtual machine. ;; For complex scala files (setq max-lisp-eval-depth 50000) (setq max-specpdl-size 5000) imenu. The Scala Map type has two type parameters, for the key type and for the value type. Since all of data types are objects, you can use a wide range of useful methods defined for them. All three methods—fold, foldLeft, and foldRight—do the same thing, but just a little differently. Each hill, each stream and tree—the terrain repeats itself. Overview of some graph concepts. The main advantage being that, we can do initialization on Per-Partition basis instead of per-element basis(as done by map() & foreach()). Welcome to the website of the Teatro alla Scala in Milan, where you can book tickets online, view the season programme (opera, ballet, concert) and discover the theatre through videos and images. Click on the map below for the audience view from the gallery seats. Never worn. Scala map keys should. So far, we’ve learned about distributing processing tasks across a Spark cluster. I still get the Java feeling in it (which I want to stay away from). How to simply sum values in a Map in Scala Here is a code snippet that sums up the values in a map in Scala: m. It also provides some abstractions for collection types. WithDefault abstract class WithDefault [A, +B] extends AbstractMap [A, B] with Map [A, B] with Serializable. Scala is a programming language which aims to provide best of both object-oriented programming and functional programming world. Scala also features mixins allowing for more orthogonal and piecemeal construction of modules that can be flexibly put together at compile time with all the benefits of static type checking. You create an array like this: var myArray : Array[String] = new Array[String](10); First you declare variable var myArray to be of type Array[String]. Statistics; org. This What is Scala Article will help you with a comprehensive approach to Scala Programming language with the help of examples on every topic in Scala. Jim McBeath said Doug: Indeed, Scala can be hard to read. It use hash code to store elements and return a map. Nota: se utilizzi Google Maps sul computer, non puoi modificare la visibilità della barra della scala. Map is used to store elements. This is an excerpt from the Scala Cookbook (partially modified for the internet). Does anybody have an idea on how to make this code more idiomatic? I tried to use scalaz Traverse, but it didn't really help. ;; For complex scala files (setq max-lisp-eval-depth 50000) (setq max-specpdl-size 5000) imenu. ☀ Best Sale Patio Dining Chairs ☀ La Scala Stacking Patio Dining Chair by Tropitone Free Shipping On Orders Over $49. In the first part I will describe the library and it’s main functions, while in the second part I’ll go in deep showing some more detailed examples. Scala is unusual because it is usually…www. ★La Scala Patio Dining Chair By Tropitone™ Find for discount La Scala Patio Dining Chair By Tropitone check price now. Check flight prices and hotel availability for your visit. Bite-sized introductions to core language features. Suppose that we have multiple maps and want to merge all their key-value pairs into one map such that for every key that appears in several input maps their values are added up. I've encountered a strange thing that i can't explain because i'm not expert of this language. How to reverse a map Suppose you wish to take a map and swap the keys with values. You can vote up the examples you like and your votes will be used in our system to product more good examples. You create an array like this: var myArray : Array[String] = new Array[String](10); First you declare variable var myArray to be of type Array[String]. 5 mm), at the same time presenting an account of contemporary architecture. Exclusive Daily Sales. This section of the Spark tutorial provides the details of Map vs FlatMap operation in Apache Spark with examples in Scala and Java programming languages. Recently we at Mendix developed a web client in Scala to start a Mendix application using only JSON commands similar as to how m2ee-tools works. #la-scala-27-5-patio-bar-stool-by-tropitone #Custom-Patio-Bar-Stools The lines are timeless, bold, sculptured - capturing a classic look of individuality and purposefulness. This post will help you get started using Apache Spark GraphX with Scala on the MapR Sandbox. For example, you can mix SynchronizedMap into HashMap, as shown in the code below. If while/yield comprehensions existed, or some comprehension for create a map. fold instead of Option. Scala map is a collection of key/value pairs. In the end Ive decided to write a blog presenting several technologies with good use cases. Es können also alle bestehenden Java-Bibliotheken und -Frameworks in Scala-Projekte eingebunden und dort genutzt werden. Therefore, I will be writing more about Scala exception handling in a different, more specialized trail. Maps are Scala collections used for groups of key value pairs. You don't need to download or install anything. scala musicale: musical scale n noun: Refers to person, place, thing, quality, etc. It takes its inspiration from the VISION RS study, borrowing the concept car’s sporty yet timeless design, complete with sculptural shapes and dynamic details. To contribute in this repo, please open a pull request from your fork of this repository. Overview of some graph concepts. The Signify team can't wait to see you at Scala Days and celebrate 10 Years of Scala. Apache Scala Spark provides in-memory cluster computing which greatly boosts the speed of iterative algorithms and interactive data mining tasks. The main advantage being that, we can do initialization on Per-Partition basis instead of per-element basis(as done by map() & foreach()). Map。以下实例演示了不可变 Map 的应用:. 1, Spring Boot,Java-8, Maven. ☀ Lowest Price Custom Patio Chaise Lounges ☀ La Scala Reclining Chaise Lounge by Tropitone Over 7 Million Items. It maintains insertion order and returns ListMap. This is just a simple benchmark to compare Hazelcast and Infinispan performance (with defaults), and includes a regular Map object as a baseline. scala> val extensions = Map("steve" -> 100, "bob" -> 101, "joe" -> 201) extensions: scala. Are you still building data pipelines with Java and Python? Are you curious about the current buzz in the Big Data community surrounding Scala as a data proces…. When using Spark API “action” functions, a result is produced back to the Spark Driver. Unfortunately, some readers have considered it strictly an attack on the Scala community and/or a biased episode of language war. This post will help you get started using Apache Spark GraphX with Scala on the MapR Sandbox. Scala has gained a lot of recognition for itself and is used by a large number of companies. This is Recipe 11. Before learning Scala, you must have the basic knowledge of C and Java. NET WPF: Map. You can vote up the examples you like and your votes will be used in our system to product more good examples. ☀ Lowest Price Custom Patio Chaise Lounges ☀ La Scala Reclining Chaise Lounge by Tropitone Over 7 Million Items. Active 3 years, 5 months ago. Groups the DataFrame using the specified columns, so we can run aggregation on them. I'll be glad to add more to this page as time goes on, but to get the ball rolling, here are three Scala flatMap (and map and flatten) examples. For example, we can easily call functions declared elsewhere. The template system has been designed to feel comfortable to those used to dealing with HTML, allowing web designers to easily work with the templates. Find local businesses, view maps and get driving directions in Google Maps. As Scala focuses on both imperative and functional programming, it offers both immutable and mutable implementations of below mentioned data structures: 1. Mon, Oct 7, 2013. Maps are of two types mutable and immutable. As a non CS graduate I only very lightly covered functional programming at university and I'd never come across it until Sca. Jim McBeath said Doug: Indeed, Scala can be hard to read. Map (3) abstract. map typically iterate over a collection and applies a function over each element of collection. Int, replace String with Int. Fast & Free Shipping On Orders Over $49. La Scala is more than just a restaurant, it's food for the old, Italian soul. ) To write applications in Scala, you will need to use a compatible Scala version (e. We could also use this with a traditional subtyping approach to have our boxes implement the map method directly with the appropriate signature. Map; As it currently stands, Map implementation up to size of 4 has a specific class Map1, Map2, Map3, Map4, beyond that, it uses an immutable HashMap. You can choose whatever format you prefer. scala> import scala. It maintains insertion order and returns ListMap. While doing so we needed a way to convert nested Scala Map's into JSON generically. Scala map is a collection of key/value pairs. Examples of collections include Arrays, Lists, etc. In this series, we have also used it when implementing our own extractors. A separate more map is created to add key / value pair to the some map. Map trait Map [A, B] extends mutable. Scala map to tuples or splat operator. Scala maps are immutable and the some map cannot be changed. However, these one liners are a good set of examples using functional programming and scala syntax you may not be familiar with. You can vote up the examples you like and your votes will be used in our system to product more good examples. online looking has now gone an extended method; it has changed the way shoppers and entrepreneurs do bu. Scala HashMap. But, this can also cause unsafe behavior with a lot of minimal-idiomatic implementations especially when Java Maps are concerned. Sukasa Scala. As more and more Java developers are learning Scala and inspired by Twitter, more and more companies are using Scala, it's future looks very bright. empty gives a special empty singleton map, with Map(a -> b) with up to 4 pairs yields specialized classes for such small maps, and 5 and upwards gives you scala. A Play Scala template is a simple text file, that contains small blocks of Scala code. Suppose that we have multiple maps and want to merge all their key-value pairs into one map such that for every key that appears in several input maps their values are added up. Unless you abuse the type system of a permissive language like Scala, if you adhere to the principles of parametricity, this approach helps you implement abstractions that are reusable under various contexts. 3 is built and distributed to work with Scala 2. It brings communicating on the road to a whole new level, the Scala G9 is setting the standards. Scala has gained a lot of recognition for itself and is used by a large number of companies. When you have eliminated the JavaScript , whatever remains must be an empty page. Methods to locate and filter classes quickly, at runtime–more quickly, in fact, than can be done with the JVM’s runtime reflection capabilities. Scala String Concatenation, Scala String Functions, Scala String format, Scala String length, Scala String substring, printf, split, trim example code. Map because of variance issues. Would have saved me a day or two of trying them all out (especially play json and json4s) if had found this earlier :-). If you had needed an array of e. Before learning Scala, you must have the basic knowledge of C and Java. The operation xs map f takes as operands a list xs of type List[T] and a function f of type T => U. Maps in Scala. 10) there is something you wanted - merged function. In Apache Spark map example, we’ll learn about all ins and outs of map function. HashMap is a concrete implementation. Scala provides a set of `preconditions` functions (assert, assume, require, ensuring). In order to use mutable Map, we must import scala. Welcome - [Instructor] Let's talk about Scala maps. Here is example o Spring boot scala example code with details, Here we have used scala 2. js optimizes your Scala code into highly efficient JavaScript. on-line searching has currently gone a protracted manner; it's modified the way customers and entrepreneurs do business thes. Physical, Geographical and Satellite maps, online street and road map for travel. This section of the Spark tutorial provides the details of Map vs FlatMap operation in Apache Spark with examples in Scala and Java programming languages. Note language coverage is incomplete. Scala: Seq, Map and Set as functions October 23, 2015 Programming , Scala Yesterday my mate asked me: “I have a List[String] and a Map[String, Int] and I want a List[Int] where its values are those of the Map whose keys match the List[String] elements, maintaining the order. 这是一篇老的文章: scala syntax primer ,从Java语法角度来看Scala语法,非常方便Java程序员转变到Scala上。 基础部分: 1. The new Scala is the first Škoda based on Volkswagen Group's modern modular MQB-A0 platform. Scala has gained a lot of recognition for itself and is used by a large number of companies. Collections may be strict or lazy. Here's a quick look at how to use the Scala Map class, with a colllection of Map class examples. Active 4 months ago. I have been unable to get a tour for The Chapel of San Lorenzo Santa Escala it's been sold out for Holy Friday the 25 and for Saturday March 26. collect (filter, map and partial cast concise one-liner) Jan 13, 2011 • zOlive. Sorting an Existing Map by Key or Value Problem You have an unsorted map and want to sort the elements in the map by the key or value - Selection from Scala Cookbook [Book]. Depending on the implementation, generators and coroutines may be almost the same thing or fairly different, but in any case, if you have either one, you can implement the other one on top of it. For more information and to book special needs tickets please contact the venue on 020 7833 2022. View 35 photos of this 4 bed, 2 bath, 1,800 Sq. 4 lbs hard reset titan pc7010me backpack boogie song haircuts for fine hair over 50 web page in another web page mohammad ajij hindi sad song lg he4 battery -amaon-ebay-alibaba a toz md Azizvideo song MP4 dora x boots fanfiction 1999 bayliner trophy 2352 review scala map literal clint locklear youtube time in canada. - [Instructor] Let's talk about Scala maps. For more information and to book special needs tickets please contact the venue on 020 7833 2022. Here are some ways you can learn to use these tools. These lands are all the same. Welcome! This is the official repository for the Scala Programming Language standard library, compiler, and language spec. Install Scala on your computer and start writing some Scala code! Tour of Scala. Note language coverage is incomplete. Iterating over a map is slightly more complex than over other collections, because a Map is the combination of 2 collections. We can't wait to feed you! Hours. Examples of collections include Arrays, Lists, etc. There is a book of prayers in English and other 8 languages that can be purchased (Euro 2. Dependency Info. The Scala Santa is over the road from the Basilica of San Giovanni in Laterano, close to San Giovanni Metro station. It provides all of the methods a Map does, with the difference that all the changes are atomic. Keys are unique in the Map, but values need not be unique. The Signify team can't wait to see you at Scala Days and celebrate 10 Years of Scala. Spark RDD map function returns a new RDD by applying a function to all elements of source RDD. Since it's hard to search for scala syntactic constructions, hopefully this page might help. Scala maps are immutable and the some map cannot be changed. It is designed to grow with user demand. Difference in implementations. Scala’s Predef object offers an implicit conversion that lets you write key -> value as an alternate syntax for the pair (key, value). Map both keys and values of a Scala Map. Lots And Lots Of foldLeft Examples. You can vote up the examples you like and your votes will be used in our system to product more good examples. What is the syntax for adding an element to a scala. Scala is beginning to remind me of the Perl slogan: "There's more. In essence, fold takes data in one format and gives it back to you in another. This is where the Scala type annotations come in. This distinguishes Scala from Java, it doesn’t has primitives. Now some type constructors on this category still look like functors. The combination of type inference and implicit conversions can make it difficult to determine the type of a variable, and that's what you need to know to find out what the operator does. mutable package. scala> val extensions = Map("steve. it is approx. Scala的类名称无需象Java那. I am trying to convert a Java List to a Scala List then use the map method to apply a function to each element then return the list of the new elements. Is possible to visit the papal chapel of Sancta Sanctorum with multimedia audio-guide (ask at the entrance). The new Scala is the first Škoda based on Volkswagen Group's modern modular MQB-A0 platform. sbt-scala-js-map. HashMap Example. The operation xs map f takes as operands a list xs of type List[T] and a function f of type T => U. Public Transport. This Scala Tutorial will help you get started with Scala Programming language. (Spark can be built to work with other versions of Scala, too. Basic Syntax. …In your Exercise Files folder, under Chapter 03, 03_06,…you'll find a file called mapExamples. In this very brilliant article, you can find a comparison between Scala libraries in terms of parsing speed. In 1880 there were 14 Scala families living in Illinois. online looking has now gone an extended method; it has changed the way shoppers and entrepreneurs do bu. From Scala, lovely walks will let you reach outstandingly beautiful towns, like Santa Caterina, Campoleone, Campidoglio, Atrani, Minuto and Pontone. Not only we can use it to replace if-else ladders also we can use it to deconstruct a value into its constituent parts. flatMap() on Future[+A] Now let's see how flatMap() works for Future, but before that let's look at the signatures of map and flatMap in scala in class Future. …Maps are Scala collections…used for groups of key value pairs. 1875 Main St Floor 2. 12 by default. HashMap is used to store element. Here are some ways you can learn to use these tools. Maps come in two kinds, mutable and immutable. [2013] looked at how often and why Scala developers mix the actor model with other models of. How to contribute. In-store pickup and alterations services available. When an object is immutable, it itself cannot be altered. ☀ Deal Shop Custom Patio Chaise Lounges ☀ La Scala Reclining Chaise Lounge by Tropitone Over 7 Million Items. It use hash code to store elements and return a map. The flatMap method is essentially a combination of the map method being run first followed by the flatten method. It is located on a rocky hill c. Maps can be created in different ways based upon our requirement and nature of the Map. Map, map and flatMap in Scala Published on 2011-12-02 10:56:39 +0000 Scala (stairs) by Paolo Campioni. Scala Collections are the containers that hold sequenced linear set of items like List, Set, Tuple, Option, Map etc. Mon, Oct 7, 2013. import scala. Viewed 62k times 80. The client code needs a java map for now, but if an elegant enough solution can produce a Scala map, I could convert it. I have a Map[String, Seq[String]] representing all the headers in an HTTP request. Moving the discussion at the bug tracker here. Public Transport. A map is a collection of key-value pairs. 5) Print all key-value of the map (iterator of the map) In Scala, the user can iterate over all element of maps using a loop statement. ★2015 Spring Scala Wall Soap Dish By ZACK™ >> If you are looking for 2015 Spring Scala Wall Soap Dish By ZACK Yes you see this. For instance, the get method of Scala's Map produces Some(value) if a value corresponding to a given key has been found, or None if the given key is not defined in the Map. Exception handling is a rather large topic to cover in full detail. Being an ardent yet somewhat impatient Python user, I was curious if there would be a large advantage in using Scala to code my data processing tasks, so I created a small benchmark data processing script using Python, Scala, and SparkSQL. Map of Scala Ad Caelum in Kingdom Hearts 3, including locations of all treasure chests found. Scala Style Guide In lieu of an o cial style guide from EPFL, or even an uno cial guide from a com-munity site like Artima, this document is intended to outline some basic Scala stylistic guidelines which should be followed with more or less fervency. It then returns a new collection by using the elements returned by the predicate function. Maps in Scala are not language syntax. Exclusive Daily Sales. Physical, Geographical and Satellite maps, online street and road map for travel. Map vs Hazelcast vs Infinispan Overview. #la-scala-stacking-patio-dining-chair-by-tropitone #Custom-Patio-Dining-Chairs , Shop Custom Patio Dining Chairs with Save Big on Quality Furniture. "Scala ad Caelum" is Latin for "Stairway to Heaven". Working with Neo4J and Scala at ThoughtWorks, I had a major qualm regarding the way we were interacting with the graph database using Cypher. On Sun JVMs, with a IO-heavy workload, we can run tens of thousands of threads on a single machine. Incremental compilation guarantees speedy (1-2s) turn-around times when your code changes. …Using this concept of storing key-value pairs…allows us to retrieve any value based on its key. Color is more orange than red with floral inside lining. Spark RDD map function returns a new RDD by applying a function to all elements of source RDD. It's not yet as popular as Java, but slowly getting momentum. Scalaのコレクションの主なメソッド一覧。 主なっちゅうか、共通メソッドとしてはほぼ全部。多. In 1880 there were 14 Scala families living in Illinois. Scala eschews coherence in favor of expressivity by allowing overlapping implicits. Through this blog, I would like to throw some light on the two most basic and most commonly used operations, map() and flatmap(), for collections in Scala. In order to use mutable Map, we must import scala. Most first-time visitors to Milan reach the square. By this I mean that Scala has many features that, by themselves, seem very strange, but, in combination, enable some very cool functionality. Scala uses the immutable map by default. Then, other Scala. Thanks to Brendan O’Connor, this cheatsheet aims to be a quick reference of Scala syntactic constructions. When working with Scala data structures, we frequently find ourselves using functional combinators, particularly map and flatMap. Depending on the implementation, generators and coroutines may be almost the same thing or fairly different, but in any case, if you have either one, you can implement the other one on top of it. Map is used to store elements. Umgekehrt ist das zwar prinzipiell möglich, in der Praxis aber nicht immer problemlos. Does anybody have an idea on how to make this code more idiomatic? I tried to use scalaz Traverse, but it didn't really help. the great book Scala Design Patterns by Ivan Nikolov confirms that: You can conclude that standard Scala types such as List, Option, and others that define a map method are. For example, we can easily call functions declared elsewhere. …We'll start with Argentina…and the capital is Buenos Aires. It stores elements in pairs of key and values. Other posts are on this blog, and you can get links to those and other resources on the links page of the Computational Linguistics course I’m creating these for. If you’ve used maps in Java, dictionaries in Python, or a hash in. The map method takes a predicate function and applies it to every element in the collection. Below is a simple Spark / Scala example describing how to convert a CSV file to an RDD and perform some simple filtering. #la-scala-reclining-chaise-lounge-by-tropitone #Custom-Patio-Chaise-Lounges , Shop Custom Patio Chaise Lounges with Get Up to 70% OFF Every Day, Plus Bulk Discounts and Personalized Service. Scala smoothly integrates features of object-oriented and functional languages. Case classes in scala are like regular classes which can hold plain and immutable data objects. 3 is built and distributed to work with Scala 2. Scaladex is officially supported by Scala Center. Here's a quick look at how to use the Scala Map class, with a colllection of Map class examples. La Scala from Mapcarta, the free map. online looking has now gone an extended method; it has changed the way shoppers and entrepreneurs do business nowada. In Scala, a map is the core dictionary type. scala> import scala. I still get the Java feeling in it (which I want to stay away from). The question asks as two define an object Set, which has a characteristic function that projects an integer to a boolean. The memory is not allocated until they are accessed. I'll be glad to add more to this page as time goes on, but to get the ball rolling, here are three Scala flatMap (and map and flatten) examples. Descriptions and source code examples for you to try Spark Transformations in your own environment. Scala - Map Methods - Scala Map Methods - Scala Online Training, Environment and Installation, Plugin with Eclipse, Scala Identifiers, Scala Keywords, Basic Literals, Variable Declaration, Variable Type Inference, Arithmetic Operators, Relational Operators, Logical Operators, Bitwise Operators, Assignment Operators, Operators Precedence in Scala, If-else Statement, If-else Expression, While. I am trying to do something that on the surface should be fairly simple. Maps in Scala.