Part-08-Arrays.md

Part 8: Arrays

Table of Contents
8-1: Overview of Arrays
8-2: Create an Array
8-3: Ranges

Overview of Arrays

In Scala, one of the biggest differences between a list and an array is that a list is immutable (i.e. unable to be changed), while arrays are mutable. Lists are typically used more frequently.

Scala arrays are similar to Java arrays, but have some added functionality, as well. Scala arrays can be generic and they are compatabile with sequences.

Create an Array

Let's create an array of integers.

input

val array1 = Array(3,6,9)

output

array1: Array[Int] = Array(3, 6, 9)

We can also create an array of mixed types, such as the one below.

input

val array2 = Array(3.14, 62, "walrus")

output

array2: Array[Any] = Array(3.14, 62, walrus)

Ranges

To populate an array with a range, we input the starting index, ending index, and we can also implement step argument. It follows the basic format below:

Array.range(start, end, step)

Here's an example of an array which starts at 0 goes to 27 and has a step size of 3. Note that since 27 is the end point, this array does not include 27.

input

val array3 = Array.range(0,27,3)

output

array3: Array[Int] = Array(0, 3, 6, 9, 12, 15, 18, 21, 24)

Project Table of Contents

Part 1: Installation, Set-Up, and "Hello World"
Part 2: Data Types
Part 3: Arithmetic Operators
Part 4: Variables vs Values
Part 5: String Operations
Part 6: Tuples
Part 7: Lists
Part 8: Arrays
Part 9: Sets
Part 10: Maps
Part 11: Logical Operators
Part 12: If Statements
Part 13: For Loops
Part 14: While Loops
Part 15: Functions