Class PackedFloat64Array

A packed array of 64-bit floating-point values.

PackedFloat64Array

Remarks

An array specifically designed to hold 64-bit floating-point values (double). Packs data tightly, so it saves memory for large array sizes.

If you only need to pack 32-bit floats tightly, see PackedFloat32Array for a more memory-friendly alternative.

Differences between packed arrays, typed arrays, and untyped arrays: Packed arrays are generally faster to iterate on and modify compared to a typed array of the same type (e.g. PackedFloat64Array versus Array[float]). 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 Array.map. Typed arrays are in turn faster to iterate on and modify than untyped arrays.

Note: Packed arrays are always passed by reference. To get a copy of an array that can be modified independently of the original array, use duplicate. This is not the case for built-in properties and methods. The returned packed array of these are a copies, and changing it will not affect the original value. To update a built-in property you need to modify the returned array, and then assign it to the property again.

Constructors

PackedFloat64Array

Constructs an empty PackedFloat64Array.

PackedFloat64Array PackedFloat64Array

PackedFloat64Array(PackedFloat64Array)

Constructs a PackedFloat64Array as a copy of the given PackedFloat64Array.

PackedFloat64Array PackedFloat64Array(PackedFloat64Array from)

Parameters

from PackedFloat64Array

PackedFloat64Array(Array)

Constructs a new PackedFloat64Array. Optionally, you can pass in a generic Array that will be converted.

PackedFloat64Array PackedFloat64Array(Array from)

Parameters

from Array

Methods

append(float)

Appends an element at the end of the array (alias of PackedFloat64Array.push_back).

bool append(float value)

Parameters

value float

append_array(PackedFloat64Array)

Appends a PackedFloat64Array at the end of this array.

void append_array(PackedFloat64Array array)

Parameters

array PackedFloat64Array

bsearch(float, bool)

Finds the index of an existing value (or the insertion index that maintains sorting order, if the value is not yet present in the array) using binary search. Optionally, a before specifier can be passed. If false, the returned index comes after all existing entries of the value in the array.

Note: Calling PackedFloat64Array.bsearch on an unsorted array results in unexpected behavior.

Note: NAN doesn't behave the same as other numbers. Therefore, the results from this method may not be accurate if NaNs are included.

int bsearch(float value, bool before)

Parameters

value float

before bool

clear

Clears the array. This is equivalent to using PackedFloat64Array.resize with a size of 0.

void clear

count(float)

Qualifiers: const

Returns the number of times an element is in the array.

Note: NAN doesn't behave the same as other numbers. Therefore, the results from this method may not be accurate if NaNs are included.

int count(float value)

Parameters

value float

duplicate

Creates a copy of the array, and returns it.

PackedFloat64Array duplicate

fill(float)

Assigns the given value to all elements in the array. This can typically be used together with PackedFloat64Array.resize to create an array with a given size and initialized elements.

void fill(float value)

Parameters

value float

find(float, int)

Qualifiers: const

Searches the array for a value and returns its index or -1 if not found. Optionally, the initial search index can be passed.

Note: NAN doesn't behave the same as other numbers. Therefore, the results from this method may not be accurate if NaNs are included.

int find(float value, int from)

Parameters

value float

from int

get(int)

Qualifiers: const

Returns the 64-bit float at the given index in the array. This is the same as using the [] operator (array[index]).

float get(int index)

Parameters

index int

has(float)

Qualifiers: const

Returns true if the array contains value.

Note: NAN doesn't behave the same as other numbers. Therefore, the results from this method may not be accurate if NaNs are included.

bool has(float value)

Parameters

value float

insert(int, float)

Inserts a new element at a given position in the array. The position must be valid, or at the end of the array (idx == size()).

int insert(int at_index, float value)

Parameters

at_index int

value float

is_empty

Qualifiers: const

Returns true if the array is empty.

bool is_empty

push_back(float)

Appends an element at the end of the array.

bool push_back(float value)

Parameters

value float

remove_at(int)

Removes an element from the array by index.

void remove_at(int index)

Parameters

index int

resize(int)

Sets the size of the array. If the array is grown, reserves elements at the end of the array. If the array is shrunk, truncates the array to the new size. Calling PackedFloat64Array.resize once and assigning the new values is faster than adding new elements one by one.

int resize(int new_size)

Parameters

new_size int

reverse

Reverses the order of the elements in the array.

void reverse

rfind(float, int)

Qualifiers: const

Searches the array in reverse order. Optionally, a start search index can be passed. If negative, the start index is considered relative to the end of the array.

Note: NAN doesn't behave the same as other numbers. Therefore, the results from this method may not be accurate if NaNs are included.

int rfind(float value, int from)

Parameters

value float

from int

set(int, float)

Changes the float at the given index.

void set(int index, float value)

Parameters

index int

value float

size

Qualifiers: const

Returns the number of elements in the array.

int size

slice(int, int)

Qualifiers: const

Returns the slice of the PackedFloat64Array, from begin (inclusive) to end (exclusive), as a new PackedFloat64Array.

The absolute value of begin and end will be clamped to the array size, so the default value for end makes it slice to the size of the array by default (i.e. arr.slice(1) is a shorthand for arr.slice(1, arr.size())).

If either begin or end are negative, they will be relative to the end of the array (i.e. arr.slice(0, -2) is a shorthand for arr.slice(0, arr.size() - 2)).

PackedFloat64Array slice(int begin, int end)

Parameters

begin int

end int

sort

Sorts the elements of the array in ascending order.

Note: NAN doesn't behave the same as other numbers. Therefore, the results from this method may not be accurate if NaNs are included.

void sort

to_byte_array

Qualifiers: const

Returns a copy of the data converted to a PackedByteArray, where each element has been encoded as 8 bytes.

The size of the new array will be float64_array.size() * 8.

PackedByteArray to_byte_array

Operators

!= (PackedFloat64Array)

Returns true if contents of the arrays differ.

bool != (PackedFloat64Array right)

Parameters

right PackedFloat64Array

+ (PackedFloat64Array)

Returns a new PackedFloat64Array with contents of right added at the end of this array. For better performance, consider using PackedFloat64Array.append_array instead.

PackedFloat64Array + (PackedFloat64Array right)

Parameters

right PackedFloat64Array

== (PackedFloat64Array)

Returns true if contents of both arrays are the same, i.e. they have all equal doubles at the corresponding indices.

bool == (PackedFloat64Array right)

Parameters

right PackedFloat64Array

[] (int)

Returns the float at index index. Negative indices can be used to access the elements starting from the end. Using index out of array's bounds will result in an error.

float [] (int index)

Parameters

index int