在UInt8Array中声明TypeScript变量

Question

如何在UInt8Array中声明TypeScript的函数参数？

import * as fs from "fs";
fs.readFile(fileName, (err: string, data: UInt8Array) => {
                if (err) {
                    return console.error(err);
                }
                console.log("file text: " + data.toString());
            });

我有个错误：

错误TS2304:找不到名称“UInt8Array”

谢谢

Answer 1

您的错误消息指示一个错误，即

error TS2304: Cannot find name 'UInt8Array'

抱怨UInt8Array。但是您要查找的名称可能是Uint8Array，带有小写的i。

Answer 2

以下实例化工作在TypeScript 1.6中(编写本报告时的最新稳定版本)：

let t01 = new Uint8Array([1, 2, 3, 4]);
let t02 = new Int8Array([1, 2, 3, 4]);  
let t03 = new Uint8Array([1, 2, 3, 4]);
let t04 = new Uint8ClampedArray([1, 2, 3, 4]);
let t05 = new Int16Array([1, 2, 3, 4]);
let t06 = new Uint16Array([1, 2, 3, 4]);
let t07 = new Int32Array([1, 2, 3, 4]);
let t08 = new Uint32Array([1, 2, 3, 4]);
let t09 = new Float32Array([1.5, 2.5, 3.5, 4.5]);
let t10 = new Float64Array([1.5, 2.5, 3.5, 4.5]);

let arrayBuffer = new ArrayBuffer(16);

用TypedArray声明ArrayLike？