Uint8Array表示8bit unsigned integers向量,初始化为0
构造
new Uint8Array(); // new in ES2017
new Uint8Array(length);
new Uint8Array(typedArray);
new Uint8Array(object);
new Uint8Array(buffer [, byteOffset [, length]]);
属性
Uint8Array.prototype.constructor|
Uint8Array.prototype.buffer|
Uint8Array.prototype.byteLength |字节的长度
Uint8Array.prototype.length|元素的长度
方法
| 方法 | 描述 |
|---|---|
| Uint8Array.prototype.copyWithin() | |
| Uint8Array.prototype.entries() | |
| Uint8Array.prototype.every() | |
| Uint8Array.prototype.fill() | |
| Uint8Array.prototype.filter() | |
| Uint8Array.prototype.find() | |
| Uint8Array.prototype.findIndex() | |
| Uint8Array.prototype.forEach() | |
| Uint8Array.prototype.includes() | |
| Uint8Array.prototype.indexOf() | |
| Uint8Array.prototype.join() | |
| Uint8Array.prototype.keys() | |
| Uint8Array.prototype.lastIndexOf() | |
| Uint8Array.prototype.map() | |
| Uint8Array.prototype.reduce() | |
| Uint8Array.prototype.reduceRight() | |
| Uint8Array.prototype.reverse() | |
| Uint8Array.prototype.set() | |
| Uint8Array.prototype.slice() | |
| Uint8Array.prototype.some() | |
| Uint8Array.prototype.sort() | |
| Uint8Array.prototype.subarray() | |
| Uint8Array.prototype.values() | |
| Uint8Array.prototype.toLocaleString() | |
| Uint8Array.prototype.toString() | |
| Uint8Array.prototype@@iterator |
例子
// From a length
var uint8 = new Uint8Array(2);
uint8[0] = 42;
console.log(uint8[0]); // 42
console.log(uint8.length); // 2
console.log(uint8.BYTES_PER_ELEMENT); // 1
// From an array
var arr = new Uint8Array([21,31]);
console.log(arr[1]); // 31
// From another TypedArray
var x = new Uint8Array([21, 31]);
var y = new Uint8Array(x);
console.log(y[0]); // 21
// From an ArrayBuffer
var buffer = new ArrayBuffer(8);
var z = new Uint8Array(buffer, 1, 4);
// From an iterable
var iterable = function*(){ yield* [1,2,3]; }();
var uint8 = new Uint8Array(iterable);
// Uint8Array[1, 2, 3]
参考:
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array
https://www.jb51.net/article/147112.htm
https://developer.51cto.com/art/201704/536718.htm
