Skip to content

Arrays

Built-in Array methods

  • arr_len() or len(arr) - returns the length of the array
  • arr_push(array, item) - adds an item to the end of the array
  • arr_pop(array, index) - removes an item from the end of the array
  • arr_append(array, item) - adds an item to the end of the array
  • arr_extend(array1, array2) - adds all the items of an array to the end of the array
  • arr_find(array, index) - returns the item at the specified index
  • arr_slice(array, start, end) - returns the items from the specified start index to the specified end index
methods.rn
 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
arr = [1, 2, 3, 4, 5]
print(arr_len(arr)) # 5

arr_push(arr, 6)
print(arr) # [1, 2, 3, 4, 5, 6]

arr_pop(arr)
print(arr) # [1, 2, 3, 4, 5]

arr_append(arr, 6)
print(arr) # [1, 2, 3, 4, 5, 6]

arr_extend(arr, [7, 8, 9])
print(arr) # [1, 2, 3, 4, 5, 6, 7, 8, 9]

print(arr_find(arr, 0)) # 1
print(arr_find(arr, 1)) # 2

print(arr_slice(arr, 0, 5)) # [1, 2, 3, 4, 5]

Array operators

  • + (concatenation)
  • * (repetition)
operators.rn
1
2
3
4
5
arr1 = [1, 2, 3]
arr2 = [4, 5, 6]

print(arr1 + arr2) # [1, 2, 3, 4, 5, 6]
print(arr1 * 2) # [1, 2, 3, 1, 2, 3]

Array standard library

  • map(func) - returns a new array with the result of calling the specified function on each item of the array
  • append(item) - adds an item to the end of the array
  • pop(index) - removes an item from the end of the array
  • extend(list) - adds all the items of an array to the end of the array
  • find(index) - returns the item at the specified index
  • slice(start, end) - returns the items from the specified start index to the specified end index
  • len() - returns the length of the array
  • is_empty() - returns true if the array is empty, otherwise false
  • to_string() - returns the string representation of the array
  • is_array() - returns true if the value is an array, otherwise false
array-standard-library.rn
 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
import Array # Include the Array standard library

# Create an array instance using the Array class
arr = Array([1, 2, 3, 4, 5])

print(len(arr)) # 5
print(arr.is_empty()) # false
print(arr.to_string()) # "[1, 2, 3, 4, 5]"
print(arr.is_array()) # true

print(arr.map(fun (item) -> str(item))) # ["1", "2", "3", "4", "5"]

print(arr.append(6)) # [1, 2, 3, 4, 5, 6]
print(arr.pop(5)) # [1, 2, 3, 4, 5]

print(arr.extend([6, 7, 8])) # [1, 2, 3, 4, 5, 6, 7, 8]
print(arr.find(0)) # 1
print(arr.find(1)) # 2

print(arr.slice(0, 5)) # [1, 2, 3, 4, 5]