An array data structure that can contain a sequence of elements of any [Variant] type. Elements are accessed by a numerical index starting at [code]0[/code]. Negative indices are used to count from the back ([code]-1[/code] is the last element, [code]-2[/code] is the second to last, etc.).
[b]Note:[/b] Arrays are always passed by [b]reference[/b]. To get a copy of an array that can be modified independently of the original array, use [method duplicate].
[b]Differences between packed arrays, typed arrays, and untyped arrays:[/b] Packed arrays are generally faster to iterate on and modify compared to a typed array of the same type (e.g. [PackedInt64Array] versus [code]Array[int][/code]). Also, packed arrays consume less memory. As a downside, packed arrays are less flexible as they don't offer as many convenience methods such as [method Array.map]. Typed arrays are in turn faster to iterate on and modify than untyped arrays.
Creates a typed array from the [param base] array. A typed array can only contain elements of the given type, or that inherit from the given class, as described by this constructor's parameters:
- [param type] is the built-in [Variant] type, as one the [enum Variant.Type] constants.
- [param class_name] is the built-in class name (see [method Object.get_class]).
- [param script] is the associated script. It must be a [Script] instance or [code]null[/code].
If [param type] is not [constant TYPE_OBJECT], [param class_name] must be an empty [StringName] and [param script] must be [code]null[/code].
The [param base] array's elements are converted when necessary. If this is not possible or [param base] is already typed, this constructor fails and returns an empty [Array].
In GDScript, this constructor is usually not necessary, as it is possible to create a typed array through static typing:
Calls the given [Callable] on each element in the array and returns [code]true[/code] if the [Callable] returns [code]true[/code] for [i]all[/i] elements in the array. If the [Callable] returns [code]false[/code] for one array element or more, this method returns [code]false[/code].
The [param method] should take one [Variant] parameter (the current array element) and return a [bool].
See also [method any], [method filter], [method map] and [method reduce].
[b]Note:[/b] Unlike relying on the size of an array returned by [method filter], this method will return as early as possible to improve performance (especially with large arrays).
Calls the given [Callable] on each element in the array and returns [code]true[/code] if the [Callable] returns [code]true[/code] for [i]one or more[/i] elements in the array. If the [Callable] returns [code]false[/code] for all elements in the array, this method returns [code]false[/code].
The [param method] should take one [Variant] parameter (the current array element) and return a [bool].
See also [method all], [method filter], [method map] and [method reduce].
[b]Note:[/b] Unlike relying on the size of an array returned by [method filter], this method will return as early as possible to improve performance (especially with large arrays).
Returns the index of [param value] in the sorted array. If it cannot be found, returns where [param value] should be inserted to keep the array sorted. The algorithm used is [url=https://en.wikipedia.org/wiki/Binary_search_algorithm]binary search[/url].
If [param before] is [code]true[/code] (as by default), the returned index comes before all existing elements equal to [param value] in the array.
Returns the index of [param value] in the sorted array. If it cannot be found, returns where [param value] should be inserted to keep the array sorted (using [param func] for the comparisons). The algorithm used is [url=https://en.wikipedia.org/wiki/Binary_search_algorithm]binary search[/url].
Similar to [method sort_custom], [param func] is called as many times as necessary, receiving one array element and [param value] as arguments. The function should return [code]true[/code] if the array element should be [i]behind[/i] [param value], otherwise it should return [code]false[/code].
If [param before] is [code]true[/code] (as by default), the returned index comes before all existing elements equal to [param value] in the array.
[codeblock]
func sort_by_amount(a, b):
if a[1] < b[1]:
return true
return false
func _ready():
var my_items = [["Tomato", 2], ["Kiwi", 5], ["Rice", 9]]
[b]Note:[/b] Calling [method bsearch_custom] on an [i]unsorted[/i] array will result in unexpected behavior. Use [method sort_custom] with [param func] before calling this method.
By default, a [b]shallow[/b] copy is returned: all nested [Array] and [Dictionary] elements are shared with the original array. Modifying them in one array will also affect them in the other.[br]If [param deep] is [code]true[/code], a [b]deep[/b] copy is returned: all nested arrays and dictionaries are also duplicated (recursively).
Finds and removes the first occurrence of [param value] from the array. If [param value] does not exist in the array, nothing happens. To remove an element by index, use [method remove_at] instead.
[b]Note:[/b] This method shifts every element's index after the removed [param value] back, which may have a noticeable performance cost, especially on larger arrays.
[b]Note:[/b] Erasing elements while iterating over arrays is [b]not[/b] supported and will result in unpredictable behavior.
[b]Note:[/b] If [param value] is a [Variant] passed by reference ([Object]-derived, [Array], [Dictionary], etc.), the array will be filled with references to the same [param value], which are not duplicates.
Calls the given [Callable] on each element in the array and returns a new, filtered [Array].
The [param method] receives one of the array elements as an argument, and should return [code]true[/code] to add the element to the filtered array, or [code]false[/code] to exclude it.
Returns the index of the [b]first[/b] occurrence of [param what] in this array, or [code]-1[/code] if there are none. The search's start can be specified with [param from], continuing to the end of the array.
[b]Note:[/b] If you just want to know whether the array contains [param what], use [method has] ([code]Contains[/code] in C#). In GDScript, you may also use the [code]in[/code] operator.
[b]Note:[/b] For performance reasons, the search is affected by [param what]'s [enum Variant.Type]. For example, [code]7[/code] ([int]) and [code]7.0[/code] ([float]) are not considered equal for this method.
Returns the index of the [b]first[/b] element in the array that causes [param method] to return [code]true[/code], or [code]-1[/code] if there are none. The search's start can be specified with [param from], continuing to the end of the array.
[param method] is a callable that takes an element of the array, and returns a [bool].
[b]Note:[/b] If you just want to know whether the array contains [i]anything[/i] that satisfies [param method], use [method any].
[codeblocks]
[gdscript]
func is_even(number):
return number % 2 == 0
func _ready():
print([1, 3, 4, 7].find_custom(is_even.bind())) # prints 2
Returns the built-in [Variant] type of the typed array as a [enum Variant.Type] constant. If the array is not typed, returns [constant TYPE_NIL]. See also [method is_typed].
Returns the [b]built-in[/b] class name of the typed array, if the built-in [Variant] type [constant TYPE_OBJECT]. Otherwise, returns an empty [StringName]. See also [method is_typed] and [method Object.get_class].
In GDScript, this is equivalent to the [code]in[/code] operator:
[codeblock]
if 4 in [2, 4, 6, 8]:
print("4 is here!") # Will be printed.
[/codeblock]
[b]Note:[/b] For performance reasons, the search is affected by the [param value]'s [enum Variant.Type]. For example, [code]7[/code] ([int]) and [code]7.0[/code] ([float]) are not considered equal for this method.
[b]Note:[/b] Arrays with equal hash values are [i]not[/i] guaranteed to be the same, as a result of hash collisions. On the countrary, arrays with different hash values are guaranteed to be different.
Inserts a new element ([param value]) at a given index ([param position]) in the array. [param position] should be between [code]0[/code] and the array's [method size].
Returns [constant OK] on success, or one of the other [enum Error] constants if this method fails.
[b]Note:[/b] Every element's index after [param position] needs to be shifted forward, which may have a noticeable performance cost, especially on larger arrays.
Returns [code]true[/code] if the array is typed. Typed arrays can only contain elements of a specific type, as defined by the typed array constructor. The methods of a typed array are still expected to return a generic [Variant].
In GDScript, it is possible to define a typed array with static typing:
Makes the array read-only. The array's elements cannot be overridden with different values, and their order cannot change. Does not apply to nested elements, such as dictionaries.
In GDScript, arrays are automatically read-only if declared with the [code]const[/code] keyword.
[b]Note:[/b] Like many similar functions in the engine (such as [method @GlobalScope.randi] or [method shuffle]), this method uses a common, global random seed. To get a predictable outcome from this method, see [method @GlobalScope.seed].
Removes and returns the element of the array at index [param position]. If negative, [param position] is considered relative to the end of the array. Returns [code]null[/code] if the array is empty. If [param position] is out of bounds, an error message is also generated.
[b]Note:[/b] This method shifts every element's index after [param position] back, which may have a noticeable performance cost, especially on larger arrays.
Removes and returns the last element of the array. Returns [code]null[/code] if the array is empty, without generating an error. See also [method pop_front].
Removes and returns the first element of the array. Returns [code]null[/code] if the array is empty, without generating an error. See also [method pop_back].
[b]Note:[/b] This method shifts every other element's index back, which may have a noticeable performance cost, especially on larger arrays.
Calls the given [Callable] for each element in array, accumulates the result in [param accum], then returns it.
The [param method] takes two arguments: the current value of [param accum] and the current array element. If [param accum] is [code]null[/code] (as by default), the iteration will start from the second element, with the first one used as initial value of [param accum].
Removes the element from the array at the given index ([param position]). If the index is out of bounds, this method fails.
If you need to return the removed element, use [method pop_at]. To remove an element by value, use [method erase] instead.
[b]Note:[/b] This method shifts every element's index after [param position] back, which may have a noticeable performance cost, especially on larger arrays.
[b]Note:[/b] The [param position] cannot be negative. To remove an element relative to the end of the array, use [code]arr.remove_at(arr.size() - (i + 1))[/code]. To remove the last element from the array, use [code]arr.resize(arr.size() - 1)[/code].
Sets the array's number of elements to [param size]. If [param size] is smaller than the array's current size, the elements at the end are removed. If [param size] is greater, new default elements (usually [code]null[/code]) are added, depending on the array's type.
Returns [constant OK] on success, or one of the other [enum Error] constants if this method fails.
[b]Note:[/b] Calling this method once and assigning the new values is faster than calling [method append] for every new element.
Returns the index of the [b]last[/b] occurrence of [param what] in this array, or [code]-1[/code] if there are none. The search's start can be specified with [param from], continuing to the beginning of the array. This method is the reverse of [method find].
Returns the index of the [b]last[/b] element of the array that causes [param method] to return [code]true[/code], or [code]-1[/code] if there are none. The search's start can be specified with [param from], continuing to the beginning of the array. This method is the reverse of [method find_custom].
Sets the value of the element at the given [param index] to the given [param value]. This will not change the size of the array, it only changes the value at an index already in the array. This is the same as using the [code][][/code] operator ([code]array[index] = value[/code]).
Shuffles all elements of the array in a random order.
[b]Note:[/b] Like many similar functions in the engine (such as [method @GlobalScope.randi] or [method pick_random]), this method uses a common, global random seed. To get a predictable outcome from this method, see [method @GlobalScope.seed].
Returns a new [Array] containing this array's elements, from index [param begin] (inclusive) to [param end] (exclusive), every [param step] elements.
If either [param begin] or [param end] are negative, their value is relative to the end of the array.
If [param step] is negative, this method iterates through the array in reverse, returning a slice ordered backwards. For this to work, [param begin] must be greater than [param end].
If [param deep] is [code]true[/code], all nested [Array] and [Dictionary] elements in the slice are duplicated from the original, recursively. See also [method duplicate]).
[codeblock]
var letters = ["A", "B", "C", "D", "E", "F"]
print(letters.slice(0, 2)) # Prints ["A", "B"]
print(letters.slice(2, -2)) # Prints ["C", "D"]
print(letters.slice(-2, 6)) # Prints ["E", "F"]
print(letters.slice(0, 6, 2)) # Prints ["A", "C", "E"]
print(letters.slice(4, 1, -1)) # Prints ["E", "D", "C"]
[b]Note:[/b] The sorting algorithm used is not [url=https://en.wikipedia.org/wiki/Sorting_algorithm#Stability]stable[/url]. This means that equivalent elements (such as [code]2[/code] and [code]2.0[/code]) may have their order changed when calling [method sort].
[param func] is called as many times as necessary, receiving two array elements as arguments. The function should return [code]true[/code] if the first element should be moved [i]before[/i] the second one, otherwise it should return [code]false[/code].
print(files) # Prints ["newfile1", "newfile2", "newfile10", "newfile11"]
[/codeblock]
[b]Note:[/b] In C#, this method is not supported.
[b]Note:[/b] The sorting algorithm used is not [url=https://en.wikipedia.org/wiki/Sorting_algorithm#Stability]stable[/url]. This means that values considered equal may have their order changed when calling this method.
[b]Note:[/b] You should not randomize the return value of [param func], as the heapsort algorithm expects a consistent result. Randomizing the return value will result in unexpected behavior.
Compares the elements of both arrays in order, starting from index [code]0[/code] and ending on the last index in common between both arrays. For each pair of elements, returns [code]true[/code] if this array's element is less than [param right]'s, [code]false[/code] if this element is greater. Otherwise, continues to the next pair.
If all searched elements are equal, returns [code]true[/code] if this array's size is less than [param right]'s, otherwise returns [code]false[/code].
Compares the elements of both arrays in order, starting from index [code]0[/code] and ending on the last index in common between both arrays. For each pair of elements, returns [code]true[/code] if this array's element is less than [param right]'s, [code]false[/code] if this element is greater. Otherwise, continues to the next pair.
If all searched elements are equal, returns [code]true[/code] if this array's size is less or equal to [param right]'s, otherwise returns [code]false[/code].
Compares the left operand [Array] against the [param right] [Array]. Returns [code]true[/code] if the sizes and contents of the arrays are equal, [code]false[/code] otherwise.
Compares the elements of both arrays in order, starting from index [code]0[/code] and ending on the last index in common between both arrays. For each pair of elements, returns [code]true[/code] if this array's element is greater than [param right]'s, [code]false[/code] if this element is less. Otherwise, continues to the next pair.
If all searched elements are equal, returns [code]true[/code] if this array's size is greater than [param right]'s, otherwise returns [code]false[/code].
Compares the elements of both arrays in order, starting from index [code]0[/code] and ending on the last index in common between both arrays. For each pair of elements, returns [code]true[/code] if this array's element is greater than [param right]'s, [code]false[/code] if this element is less. Otherwise, continues to the next pair.
If all searched elements are equal, returns [code]true[/code] if this array's size is greater or equal to [param right]'s, otherwise returns [code]false[/code].
Returns the [Variant] element at the specified [param index]. Arrays start at index 0. If [param index] is greater or equal to [code]0[/code], the element is fetched starting from the beginning of the array. If [param index] is a negative value, the element is fetched starting from the end. Accessing an array out-of-bounds will cause a run-time error, pausing the project execution if run from the editor.
