Int8Array
=========

Объект **`Int8Array`** представляет типизированный массив 8-разрядных целых значений. Содержимое инициализируется значением 0. Создав экземпляр **`Int8Array`**, возможно получить доступ к элементам массива, используя методы объекта или стандартный синтаксис доступа к элементу массива по его индексу (с помощью скобочной нотации).

Syntax
------
```

new Int8Array(); // new in ES2017
new Int8Array(length);
new Int8Array(typedArray);
new Int8Array(object);
new Int8Array(buffer [, byteOffset [, length]]);
```


Для более детальной информации о синтаксисе конструктора смотрите *TypedArray*.

Properties
----------

`Int8Array.BYTES_PER_ELEMENT`

Возвращает числовое значение размера элемента массива. `1` в случае с `Int8Array`.

Int8Array.length

Статическая длина конструктора `Int8Array`, всегда равна `3` (т.к. конструктор принимает до 3 аргументов). Чтобы узнать длину созданного массива, see `Int8Array.prototype.length` (en-US).

`Int8Array.name` (en-US)

Возвращает строчное значение имени конструктора. В случае с `Int8Array`: "Int8Array".

`Int8Array.prototype` (en-US)

Прототип для *TypedArray* objects.

Methods
-------

`Int8Array.from()` (en-US)

Creates a new `Int8Array` from an array-like or iterable object. See also `Array.from()`.

`Int8Array.of()` (en-US)

Creates a new `Int8Array` with a variable number of arguments. See also `Array.of()`.

`Int8Array` prototype
---------------------

All `Int8Array` objects inherit from `%TypedArray%.prototype` (en-US).

### Properties

`Int8Array.prototype.constructor`

Returns the function that created an instance's prototype. This is the `Int8Array` constructor by default.

`Int8Array.prototype.buffer` (en-US) Только для чтения 

Returns the `ArrayBuffer` referenced by the `Int8Array` Fixed at construction time and thus **read only**.

`Int8Array.prototype.byteLength` (en-US) Только для чтения 

Returns the length (in bytes) of the `Int8Array` from the start of its `ArrayBuffer`. Fixed at construction time and thus **read only.**

`Int8Array.prototype.byteOffset` (en-US) Только для чтения 

Returns the offset (in bytes) of the `Int8Array` from the start of its `ArrayBuffer`. Fixed at construction time and thus **read only.**

`Int8Array.prototype.length` (en-US) Только для чтения 

Returns the number of elements hold in the `Int8Array`. Fixed at construction time and thus **read only.**

### Methods

`Int8Array.prototype.copyWithin()` (en-US)

Copies a sequence of array elements within the array. See also `Array.prototype.copyWithin()`.

`Int8Array.prototype.entries()` (en-US)

Returns a new `Array Iterator` object that contains the key/value pairs for each index in the array. See also `Array.prototype.entries()`.

`Int8Array.prototype.every()` (en-US)

Tests whether all elements in the array pass the test provided by a function. See also `Array.prototype.every()`.

`Int8Array.prototype.fill()` (en-US)

Fills all the elements of an array from a start index to an end index with a static value. See also `Array.prototype.fill()`.

`Int8Array.prototype.filter()` (en-US)

Creates a new array with all of the elements of this array for which the provided filtering function returns true. See also `Array.prototype.filter()`.

`Int8Array.prototype.find()` (en-US)

Returns the found value in the array, if an element in the array satisfies the provided testing function or `undefined` if not found. See also `Array.prototype.find()`.

`Int8Array.prototype.findIndex()` (en-US)

Returns the found index in the array, if an element in the array satisfies the provided testing function or -1 if not found. See also `Array.prototype.findIndex()`.

`Int8Array.prototype.forEach()` (en-US)

Calls a function for each element in the array. See also `Array.prototype.forEach()`.

`Int8Array.prototype.includes()` (en-US) 
Экспериментальная возможность

Determines whether a typed array includes a certain element, returning `true` or `false` as appropriate. See also `Array.prototype.includes()`.

`Int8Array.prototype.indexOf()` (en-US)

Returns the first (least) index of an element within the array equal to the specified value, or -1 if none is found. See also `Array.prototype.indexOf()`.

`Int8Array.prototype.join()`

Joins all elements of an array into a string. See also `Array.prototype.join()`.

`Int8Array.prototype.keys()` (en-US)

Returns a new `Array Iterator` that contains the keys for each index in the array. See also `Array.prototype.keys()`.

`Int8Array.prototype.lastIndexOf()` (en-US)

Returns the last (greatest) index of an element within the array equal to the specified value, or -1 if none is found. See also `Array.prototype.lastIndexOf()`.

`Int8Array.prototype.map()` (en-US)

Creates a new array with the results of calling a provided function on every element in this array. See also `Array.prototype.map()`.

`Int8Array.prototype.move()` 
Non-standard
 Не реализовано

Former non-standard version of `Int8Array.prototype.copyWithin()` (en-US).

`Int8Array.prototype.reduce()` (en-US)

Apply a function against an accumulator and each value of the array (from left-to-right) as to reduce it to a single value. See also `Array.prototype.reduce()`.

`Int8Array.prototype.reduceRight()` (en-US)

Apply a function against an accumulator and each value of the array (from right-to-left) as to reduce it to a single value. See also `Array.prototype.reduceRight()`.

`Int8Array.prototype.reverse()` (en-US)

Reverses the order of the elements of an array — the first becomes the last, and the last becomes the first. See also `Array.prototype.reverse()`.

`Int8Array.prototype.set()`

Stores multiple values in the typed array, reading input values from a specified array.

`Int8Array.prototype.slice()` (en-US)

Extracts a section of an array and returns a new array. See also `Array.prototype.slice()`.

`Int8Array.prototype.some()` (en-US)

Returns true if at least one element in this array satisfies the provided testing function. See also `Array.prototype.some()`.

`Int8Array.prototype.sort()` (en-US)

Sorts the elements of an array in place and returns the array. See also `Array.prototype.sort()`.

`Int8Array.prototype.subarray()` (en-US)

Returns a new `Int8Array` from the given start and end element index.

`Int8Array.prototype.values()` (en-US)

Returns a new `Array Iterator` object that contains the values for each index in the array. See also `Array.prototype.values()`.

`Int8Array.prototype.toLocaleString()` (en-US)

Returns a localized string representing the array and its elements. See also `Array.prototype.toLocaleString()`.

`Int8Array.prototype.toString()` (en-US)

Returns a string representing the array and its elements. See also `Array.prototype.toString()`.

`Int8Array.prototype[@@iterator]()` (en-US)

Returns a new `Array Iterator` object that contains the values for each index in the array.

Examples
--------

Different ways to create an `Int8Array`:


```js
// From a length
var int8 = new Int8Array(2);
int8[0] = 42;
console.log(int8[0]); // 42
console.log(int8.length); // 2
console.log(int8.BYTES\_PER\_ELEMENT); // 1

// From an array
var arr = new Int8Array([21, 31]);
console.log(arr[1]); // 31

// From another TypedArray
var x = new Int8Array([21, 31]);
var y = new Int8Array(x);
console.log(y[0]); // 21

// From an ArrayBuffer
var buffer = new ArrayBuffer(8);
var z = new Int8Array(buffer, 1, 4);

// From an iterable
var iterable = (function\* () {
  yield\* [1, 2, 3];
})();
var int8 = new Int8Array(iterable);
// Int8Array[1, 2, 3]
```

Specifications
--------------

| Specification |
| --- |
| ECMAScript Language Specification # table-49 |

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--------------------------

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Compatibility notes
-------------------

Starting with ECMAScript 2015, `Int8Array` constructors require to be constructed with a `new` operator. Calling a `Int8Array` constructor as a function without `new`, will throw a `TypeError` from now on.


```js
var dv = Int8Array([1, 2, 3]);
// TypeError: calling a builtin Int8Array constructor
// without new is forbidden
```



```js
var dv = new Int8Array([1, 2, 3]);
```

See also
--------

* JavaScript typed arrays
* `ArrayBuffer`
* `DataView`