Scala for the impatient github

Since scala runs on the jvm, it can access any java library and is interoperable with java frameworks. It interoperates seamlessly with both java and javascript. Aug 12, 2012 1 points to cascading for the impatient articles 2 cascading version links points to paco nathans github repo, scalding versions point to mine. Scala for the impatient concisely shows developers what scala can do and how to do it. For example, scala reverse hello world should print world hello.

Scala is the functional and objectoriented programming language created by lightbend cofounder, prof. Alexander mikhailovs repository proved a more useful source of inspirationideas when stuck. The code for the scalding version is fairly easy to read if you know scala somewhat harder, but still possible if you dont. For all the details, refer to the release notes on github. A full description of avro is outside the scope of this documentation, but here is an introduction from avro. For example, if you make an array of int, you get an int array in the virtual machine. We are excited to announce the release of a new version of the online course functional program design. If you are reading this quickstart guide you probably already know how to use scala in your project and probably have your favorite ide or build setup to program in scala. It is the job of the scala compiler to convert between primitive types and wrappers. Here is my attempt to solve the exercises and hopefully learn something new about the scala language. What are some interesting scala projects to examine for.

A method with return type unit is analogous to a java method which is declared void. One recommended approach would be first to make your github project compiledrun with sbt which ensures both ideindependence and thirdparty library dependency management. Scala for the impatient 2nd edition pdf free download, this a free book for impatient people who want to learn scala quickly. Here is what worked for me to learn the basics well. It will also help you recognize many counterintuitive traps and pitfalls and prevent them from inflicting further production bug hunt stress on scala developers. And of course, you can ask here at coderanch about a.

In scala, everything is an object, even an integer. Scala also makes it easier to leverage the full power of concurrency. The java api is nice and provides a good experience for the developer but, as a scala developer, i am really impatient to play with the scala api. In scala, it is possible to use pattern matching in an assignment. Aug 25, 20 full coverage of scala is not the goal of the book and so is convincing you to use functional paradigm over objectoriented one or vice versa. See the int class in the scala doc for a complete list. I decided to share these solutions here in order to help those who couldnt get the hang of one or more exercises. Write a function that, given a string, produces a map of the indexes of all characters. Scala puzzlers is a collection of such examples in scala. Notes while working through scala for the impatient github. Thus, these lectures assumed the audience knew the concepts and showed how to use them in scala.

There is only one value of type unit, and it is not represented by any object in the. You can play with it by typing oneline expressions and observing the results. Here, we just show how to get an accumulator of the scala map type. Contribute to scalascalalang development by creating an account on github. My own solutions to the exercises contained in scala for the impatient by cay horstmann project description. But you can also rely on it for large mission critical systems, as many companies, including twitter, linkedin, or intel do. Make a class car with readonly properties for manufacturer, model name, and model year, and a readwrite property for the license plate. Core java for the impatient where are the answers to the. My solutions to exercises of cay horstmanns book scala for impatient. Sign up my solutions for scala for the impatient exercises. Importing a scala project from github into eclipse stack. Scala school started as a series of lectures at twitter to prepare experienced engineers to be productive scala programmers.

Each chapter of the book ends with some exercises to test out the topics the reader just learned. Having said that, it has been noted that this feature of scala often has been misused. At least one person posted student answers on github. This trend is driven by the adoption of scala as the main programming language for many applications. My solutions to the exercises from the excellent scala for the impatient book. Full coverage of scala is not the goal of the book and so is convincing you to use functional paradigm over objectoriented one or vice versa. One way to create random file or directory names is to produce a random bigint and convert it to base 36, yielding a string such as qsnvbevtomcj38o06kul. For the impatient, heres how to get started using scalafx in your development. Functional programming is becoming increasingly widespread in industry. It is not only an entertaining and instructive way of understanding this highly expressive language better. Poke around scaladoc to find a way of doing this in scala. My solutions for scala for the impatient exercises. It will also help you recognize many counterintuitive traps and pitfalls and prevent them from inflicting further.

Using scala, you can write programs more concisely than in java, as well as leverage the full power of concurrency. Each expression in the above code is followed by and then name. That could lead to blinkered abstraction where abstraction puts a blinker on developers thinking and they try to fit the entire world into their abstraction. This repository sign in sign up code issues 1 pull requests 0 projects 0 actions security pulse. System class, reads the user name from the system property, reads a password from the console object, and prints a message to the standard. Github lucianofiandesioscalafortheimpatientsolutions. There is only one value of type unit, and it is not represented by any object in the underlying runtime system. It make me feel scala is dump of random unrelated features, its very easy to disappoint. But the problem is, com is a widely used toplevel package, so in this case the restriction is not very useful. There are plenty of github repositories that contain exercises for one or two chapters of scala for the impatient.

I discovered scala during a master course and was immediately seduced by it. Scala for the impatient 2nd edition pdf free download. Regarding the title scala for the impatient dont get fooled by the impatient part. Im reading the exceptionally good book scala for the impatient. Mar 11, 2016 also i disagree that scala for impatient is good book for start. My solutions for the exercises in scala for the impatient, second edition. Scala is a relatively new language, but draws on many familiar concepts. Check here for the errata, or contribute a new bug report. Write a scala application, using the app trait, that prints the commandline arguments in reverse order, separated by spaces. Designed to be concise, many of scalas design decisions aimed to address criticisms of java. Scala source code is intended to be compiled to java bytecode, so that the resulting executable code runs on a java virtual machine. However, despite all above i think scala is definitely worth to invest some time. Scala fuses functional and objectoriented programming in a practical package.