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Learn Scala from Scratch

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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 ArrayBuffers 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 Chapter Quiz

Control Structures

Control Structures in Scala

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

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

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Exception Handling with try

Exception Handling with try

This lesson introduces the try control structure and teaches you how it can be used for exception handling.

Exception Handling

When running a program, we sometimes encounter unexpected conditions which give us errors and warnings. These conditions are known as exceptions. While exceptions are unexpected, they need to be anticipated by the programmer and only then can they be dealt with in a timely manner. The process of skillfully handling exceptions is known as exception handling.

Let’s take a real-life example to better visualize exception handling.

Imagine ...

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