cheat sheet

A collection of 100+ Scala String examples

This page contains a collection of over 100 Scala String examples, including strings functions, format specifiers, and more. I don’t provide too many details about how things work in these examples; this is mostly just a collection of examples that can be used as a reference page or cheat sheet. (I do show the output of most examples.)

First, here are some basic uses of the Scala String class to help get us warmed up:

“Kotlin Quick Reference” book

Table of Contents1 - Kotlin Quick Reference2 - It’s free3 - It’s open source4 - A caveat5 - Contributing6 - The Kindle version7 - Downloads

Somewhere in mid-2017 I started working on a Kotlin programming book, but then I had to get away from it to work on other things. When I got back to it recently I looked around and felt like the world didn’t need another “Introduction to Kotlin” book — there are a couple of good ones out there, including Kotlin in Action, and the kotlinlang.org documentation is excellent — so I decided to ditch the project completely.

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Kotlin Quick Reference

But then when I started writing some Kotlin code again I realized that what I really needed was a quick reference. I didn’t want to have to dig through a tutorial book or website to find what I need, I just wanted something like a large cheat sheet where I could quickly find the Kotlin syntax and examples for whatever I was working on at that moment. So I decided to strip down what I had already written and create both a book and a Kotlin Quick Reference website.

Recently-added Scala cheat sheets, tutorials, syntax, and examples alvin June 17, 2018 - 6:10pm

As I try to organize things a bit around here, here’s a list of some tutorials I’ve written lately about the Scala collections classes:

Scala List class: methods, examples, and syntax

This page contains a large collection of examples of how to use the methods on the Scala List class.

The Scala List class as an immutable, linear, linked-list class. It’s very efficient when it makes sense for your algorithms to (a) prepend all new elements, (b) work with it in terms of its head and tail elements, and (c) use functional methods that traverse the list from beginning to end, such as filter, map, foldLeft, reduceLeft.

Scala Seq class: methods, examples, and syntax alvin May 21, 2018 - 5:47pm

This page contains a large collection of examples of how to use the methods on the Scala Seq class.

Important note about Seq, IndexedSeq, and LinearSeq

As an important note, I use Seq in the following examples to keep things simple, but in your code you should be more precise and use IndexedSeq or LinearSeq where appropriate. As the Seq class Scaladoc states: