Int32Array
The Int32Array
typed array represents an array of twos-complement 32-bit signed integers in the platform byte order. If control over byte order is needed, use DataView
instead. The contents are initialized to 0
. Once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
Int32Array
is a subclass of the hidden TypedArray
class.
Constructor
Int32Array()
-
Creates a new
Int32Array
object.
Static properties
Also inherits static properties from its parent TypedArray
.
Int32Array.BYTES_PER_ELEMENT
-
Returns a number value of the element size.
4
in the case ofInt32Array
.
Static methods
Inherits static methods from its parent TypedArray
.
Instance properties
Also inherits instance properties from its parent TypedArray
.
These properties are defined on Int32Array.prototype
and shared by all Int32Array
instances.
Int32Array.prototype.BYTES_PER_ELEMENT
-
Returns a number value of the element size.
4
in the case of aInt32Array
. Int32Array.prototype.constructor
-
The constructor function that created the instance object. For
Int32Array
instances, the initial value is theInt32Array
constructor.
Instance methods
Inherits instance methods from its parent TypedArray
.
Examples
Different ways to create an Int32Array
js
// From a length
const int32 = new Int32Array(2);
int32[0] = 42;
console.log(int32[0]); // 42
console.log(int32.length); // 2
console.log(int32.BYTES_PER_ELEMENT); // 4
// From an array
const x = new Int32Array([21, 31]);
console.log(x[1]); // 31
// From another TypedArray
const y = new Int32Array(x);
console.log(y[0]); // 21
// From an ArrayBuffer
const buffer = new ArrayBuffer(32);
const z = new Int32Array(buffer, 4, 4);
console.log(z.byteOffset); // 4
// From an iterable
const iterable = (function* () {
yield* [1, 2, 3];
})();
const int32FromIterable = new Int32Array(iterable);
console.log(int32FromIterable);
// Int32Array [1, 2, 3]
Specifications
Specification |
---|
ECMAScript Language Specification # table-49 |
Browser compatibility
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