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 theUint32Array
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 itsArrayBuffer
. 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 itsArrayBuffer
. 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);