Array

a = [1, 2, 3, 4, 5]
puts(a[2])
puts(a[-2])
puts(a[:2])
puts(a[:-2])
puts(a[2:])
puts(a[-2:])
puts(a[1:-2])

// should output
[1, 2]
[1, 2, 3]
[3, 4, 5]
[4, 5]
[2, 3]
[1, 2, 8, 9, 5]

Literal Specific Methods

first()

Returns STRING|ARRAY|HASH|BOOLEAN|INTEGER|NIL|FUNCTION|FILE

Returns the first element of the array. Shorthand for array[0]

["a", "b", 1, 2].first()

Output

"a"

include?(STRING|ARRAY|HASH|BOOLEAN|INTEGER|NIL|FILE)

Returns BOOLEAN

Returns true or false wether the array contains the given element

[1,2,3].include?(4)
[1,2,3].include?(3)

Output

false
true

index(STRING|ARRAY|HASH|BOOLEAN|INTEGER|NIL|FILE)

Returns INTEGER

Returns the index of the given element in the array if found. Otherwise return -1.

["a", "b", 1, 2].index(1)

Output

2

join(STRING)

Returns STRING

last()

Returns STRING|ARRAY|HASH|BOOLEAN|INTEGER|NIL|FUNCTION|FILE

Returns the last element of the array.

["a", "b", 1, 2].last()

Output

2

pop()

Returns STRING|ARRAY|HASH|BOOLEAN|INTEGER|NIL|FUNCTION|FILE

Removes the last element of the array and returns it.

a = [1,2,3]
a.pop()
a

Output

[1, 2, 3]
3
[1, 2]

push(STRING|ARRAY|HASH|BOOLEAN|INTEGER|NIL|FUNCTION|FILE)

Returns NIL

Adds the given object as last element to the array.

a = [1,2,3]
a.push("a")
a

Output

[1, 2, 3]
nil
[1, 2, 3, "a"]

reverse()

Returns ARRAY

Reverses the elements of the array

["a", "b", 1, 2].reverse()

Output

[2, 1, "b", "a"]

size()

Returns INTEGER

Returns the amount of elements in the array.

["a", "b", 1, 2].size()

Output

4

slices(INTEGER)

Returns ARRAY

Returns the elements of the array in slices with the size of the given integer

[1,2,3,4,5,6,7,8].slices(3)

Output

[[1, 2, 3], [4, 5, 6], [7, 8]]

sort()

Returns ARRAY

Sorts the array if it contains only one type of STRING, INTEGER or FLOAT

[3.4, 3.1, 2.0].sort()

Output

[2.0, 3.1, 3.4]

sum()

Returns INTEGER

uniq()

Returns ARRAY|ERROR

Returns a copy of the array with deduplicated elements. Raises an error if a element is not hashable.

["a", 1, 1, 2].uniq()

Output

[1, 2, "a"]

Generic Literal Methods

methods()

Returns ARRAY

Returns an array of all supported methods names.

"test".methods()

Output

["upcase", "find", "format", "reverse", "split", "replace", "strip!", "count", "reverse!", "lines", "downcase!", "upcase!", "size", "strip", "downcase"]

to_f()

Returns FLOAT

If possible converts an object to its float representation. If not 0.0 is returned.

1.to_f()
"1.4".to_f()
nil.to_f()

Output

1.0
1.4
0.0

to_i(INTEGER)

Returns INTEGER

If possible converts an object to its integer representation. If not 0 is returned.

true.to_i()
false.to_i()
1234.to_i()
"4".to_i()
"10011010010"to_i(2)
"2322".to_i(8)
"0x2322".to_i()

Output

1
0
1234
4
1234
1234
1234

to_json()

Returns STRING|ERROR

Returns the object as json notation.

a = {"test": 1234}
a.to_json()

Output

{"test": 1234}
"{\"test\":1234}"

to_s(INTEGER)

Returns STRING

If possible converts an object to its string representation. If not empty string is returned.

true.to_s()
1234.to_s()
1234.to_s(2)
1234.to_s(8)
1234.to_s(10)
"test".to_s()
1.4.to_s()

Output

"true"
"1234"
"10011010010"
"2322"
"1234"
"test"
"1.4"

type()

Returns STRING

Returns the type of the object.

"test".type()

Output

"STRING"

wat()

Returns STRING

Returns the supported methods with usage information.

true.wat()

Output

"BOOLEAN supports the following methods:
to_s()"