Uint32Array

Uint32Array 表示一个由基于平台字节序的32位无符号字节组成的数组.如果需要对字节顺序进行控制(译者注:即 littleEndian 或 bigEndian),请使用 DataView 代替.数组中每个元素的初始值都是0.一旦创建，你可以用对象的方法引用数组里的元素，或者使用标准的数组索引语法（即，使用中括号）。

语法

new Uint32Array(); // new in ES2017
new Uint32Array(length);
new Uint32Array(typedArray);
new Uint32Array(object);
new Uint32Array(buffer [, byteOffset [, length]]);

更多的构造器语法和属性请参照 TypedArray。

属性

Uint32Array.BYTES_PER_ELEMENT

返回一个number类型的值，表示元素的size。 Uint32Array 返回4。

Uint32Array.length

长度属性，它的值是3。

Uint32Array.name

返回字符串类型的值，表示构造器的名字。 Uint32Array 的返回值是:"Uint32Array"。

Uint32Array.prototype

返回 TypedArray 对象的原型链。

方法

Uint32Array.from()

参考 Array.from() 。未完成，请参考 bug 896608。

Uint32Array.of()

参考 Array.of() 。未完成，请参考 bug 896608.

Uint32Array prototype

所有Uint32Array 对象继承自 %TypedArray%.prototype .

Properties

Uint32Array.prototype.constructor

返回创建实例原型的函数。默认返回 Uint32Array 的构造器。

Uint32Array.prototype.buffer 只读

Returns the ArrayBuffer referenced by the Uint32Array Fixed at construction time and thus read only .

Uint32Array.prototype.byteLength 只读

Returns the length(in bytes)of the Uint32Array from the start of its ArrayBuffer . Fixed at construction time and thus read only.

Uint32Array.prototype.byteOffset 只读

Returns the offset(in bytes)of the Uint32Array from the start of its ArrayBuffer . Fixed at construction time and thus read only.

Uint32Array.prototype.length 只读

Returns the number of elements hold in the Uint32Array . Fixed at construction time and thus read only.

Methods

Uint32Array.prototype.copyWithin()

See Array.prototype.copyWithin() .

Uint32Array.prototype.move() 未实现

Former non-standard version of Uint32Array.prototype.copyWithin() .

Uint32Array.prototype.set()

Stores multiple values in the Uint32Array , reading input values from a specified array.

Uint32Array.prototype.subarray()

Returns a new Uint32Array from the given start and end element index.

Examples

// From a length
var uint32 = new Uint32Array(2);
uint32[0] = 42;
console.log(uint32[0]); // 42
console.log(uint32.length); // 2
console.log(uint32.BYTES_PER_ELEMENT); // 4

// From an array
var arr = new Uint32Array([21,31]);
console.log(arr[1]); // 31

// From another TypedArray
var x = new Uint32Array([21, 31]);
var y = new Uint32Array(x);
console.log(y[0]); // 21

// From an ArrayBuffer
var buffer = new ArrayBuffer(16);
var z = Uint32Array(buffer, 0, 4);