List Methods | Joa Documentation

length is a property (no parentheses); all others are methods.

Method / Property	Returns	Description
`list.length`	`Integer`	Number of elements
`list.contains(val)`	`Bool`	Whether the list contains an equal value
`list.append(val)`	`List`	Appends `val` in-place; returns the same list
`list.pop()`	`any`	Removes and returns the last element
`list.pop(i)`	`any`	Removes and returns the element at index `i`
`list.slice(start, end)`	`List`	Returns a new sub-list from `start` (inclusive) to `end` (exclusive)
`list.reverse()`	`List`	Returns a new reversed copy (does not mutate)
`list.sort()`	`List`	Returns a new sorted copy (does not mutate)
`list.join(sep)`	`String`	Joins elements into a string using `sep` as separator
`list.index_of(val)`	`Integer`	Index of first occurrence, or `-1` if not found

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

print(nums.sort())           // [1, 2, 3, 5, 8, 9]
print(nums.reverse())        // [2, 9, 1, 8, 3, 5]
print(nums.slice(1, 4))      // [3, 8, 1]  (original list is unchanged)
print(nums.length)           // 6

let words = ["hello", "world", "foo"]
words.append("bar")
let last = words.pop()       // "bar" — removes last element
print(words.join(", "))      // hello, world, foo
print(words.index_of("world"))  // 1

Negative indices in pop() count from the end:

let items = [10, 20, 30, 40]
print(items.pop(-1))   // 40
print(items)           // [10, 20, 30]