Back To Module Home

Learn Scala from Scratch

0% completed

Getting to Know Scala

Scala: A History A 'Scalable' Language A Featurette: Scala Features Who's Using Scala?

Variables and Types

Variables in Scala Printing in Scala Immutable Variables Mutable Variables Data Types Challenge: Declaring a Variable Solution Review: Declaring a Variable Type Casting in Scala Challenge: Type Casting Solution Review: Type Casting Strings and Other Literals Type Inference Chapter Quiz

Operating with Operators

A Brief Introduction to Methods and Functions An Introduction to Operators Arithmetic Operators Relational Operators Logical Operators Bitwise Operators Assignment Operators Challenge: Using Multiple Operators Solution Review: Using Multiple Operators Operator Precedence Challenge: Temperature Conversion Solution Review: Temperature Conversion Chapter Quiz

Strings and How to Use Them

An Introduction String Interpolation with 's'Challenge: Embed a Variable in a String Solution Review: Embed a Variable in a String String Interpolation with 'f'Challenge: Formatting Strings Solution Review: Formatting Strings String Interpolation with 'raw'Testing String Equality Creating Multiline Strings Splitting Strings Finding Patterns in Strings Replacing Patterns in Strings Methods for Comparing Strings Challenge: Searching a String Solution Review: Searching a String Chapter Quiz

Scala's Collection Library

A Brief Introduction to Objects and Classes

An Introduction to the Collection Library

foreach: A Collection Method

The Array Collection

Challenge: Array of Integers

Solution Review: Array of Integers

Working with Lists

Challenge: Appending an Element to a List

Solution Review: Appending an Element to a List

Getting Started with Vectors

Creating a Range of Numbers

LazyList: A Lazy Version of List

Control Structures

Control Structures in Scala Decide with if Optimizing an if Program Challenge: Pass or Fail Solution Review: Pass or Fail Loop with while Challenge: Oven is Ready!Solution Review: Oven is Ready!Iterate with for Challenge: Array of Squares Solution Review: Array of Squares Exception Handling with try Pattern Matching with Match Challenge: Color Wheel Solution Review: Color Wheel Types of Patterns Chapter Quiz

Getting Started with Functions

Defining a Function Challenge: Absolute Value Solution Review: Absolute Value Evaluation Strategies Quiz: CBV or CBN?Code Termination Recursive Functions Challenge: Sum of Lists Solution Review: Sum of Lists Learning by Example: Newton's Method Blocks Challenge: Max with Nested Functions Solution Review: Max with Nested Functions Lexical Scope Tail Recursion Challenge: Tail Recursion Solution Review: Tail Recursion Chapter Quiz

Higher-Order Functions

What are Higher-Order Functions?Learning by Example: Summation Summation with Higher-Order Functions Challenge: Write your First Higher-Order Function Solution Review: Write Your First Higher-Order Function Anonymous Functions Summation with Anonymous Functions Challenge: Anonymous Functions Solution Review: Anonymous Functions Functions Returning Functions Currying Summation with Currying Expanding a Multiple Parameter List Challenge: Using a Curried Function Solution Review: Using a Curried Function Chapter Quiz

Classes and Objects

Creating a Class in Scala Objects of a Class Creating an Object Using Constructor Parameters Learning by Example: checksum Singleton Objects: Companion Singleton Objects: Standalone Chapter Quiz

Conclusion

...

/

LazyList: A Lazy Version of List

LazyList: A Lazy Version of List

In this lesson, you will be introduced to LazyLists; the lazy version of Lists.

Introduction

A LazyList is an immutable sequence type collection very similar to Lists. What makes a LazyList lazy is that it only computes required elements, allowing it to be infinitely long. Other than this difference, LazyLists have the same performance characteristics as Lists, hence, to avoid repetition, we won’t discuss them here.

Creating a LazyList

Similar to the :: method used for creating Lists, LazyLists are created with the ...