Arrays

Arrays are ordered, dynamic-length lists that can hold any mix of types.

Creating Arrays

let nums = [1, 2, 3, 4, 5]
let mixed = ["hello", 42, true, null]
let empty = []

Accessing Elements

Zero-indexed with bracket notation:

let fruits = ["apple", "banana", "cherry"]
say fruits[0]   # apple
say fruits[2]   # cherry

Modifying Arrays

let arr = [1, 2, 3]

# Change an element
arr[0] = 10
say arr   # [10, 2, 3]

# Add to the end
push(arr, 4)
say arr   # [10, 2, 3, 4]

# Remove from the end
let last = pop(arr)
say last  # 4
say arr   # [10, 2, 3]

Array Length

let arr = [1, 2, 3]
say len(arr)   # 3

Iterating

let colors = ["red", "green", "blue"]
let i = 0
while i < len(colors) {
  say "{i + 1}. {colors[i]}"
  i = i + 1
}

Array Functions

Function	Description
len(arr)	Number of elements
push(arr, value)	Add to end
pop(arr)	Remove and return last element
reverse(arr)	Reverse in place (mutates)
sort(arr)	Sort in place (mutates)
slice(arr, start, end)	Return sub-array
contains(arr, value)	Check if value exists
join(arr, separator)	Join elements into a string
map(arr, fn)	Transform each element
filter(arr, fn)	Keep elements matching predicate
reduce(arr, fn, initial)	Fold array into single value

Examples

let nums = [5, 2, 8, 1, 9, 3]

# Sort
sort(nums)
say nums   # [1, 2, 3, 5, 8, 9]

# Map + Filter
fn square(x) { return x * x }
fn is_big(x) { return x > 10 }

let squared = map(nums, square)
let big = filter(squared, is_big)
say big   # [25, 64, 81]