Zhentiw - 博客园

2024年8月11日

摘要： class ApplicationError extends Error { get name() { return this.constructor.name; } } class DatabaseError extends ApplicationError {} class UserFacing 阅读全文

posted @ 2024-08-11 22:06 Zhentiw 阅读(10) 评论(0) 推荐(0)

[Node.js] Hasbang Grammar

摘要： You can create a javascript file as a bash file: #!/usr/bin/env node console.log("Hello World!") Run the script: ./script.js 阅读全文

posted @ 2024-08-11 22:04 Zhentiw 阅读(13) 评论(0) 推荐(0)

[Javascript] Error Cause

摘要： class Product { name; price; constructor(name, price) { this.name = name; try { this.price = price * 1.30; } catch(e) { throw new Error("Product canno 阅读全文

posted @ 2024-08-11 22:03 Zhentiw 阅读(9) 评论(0) 推荐(0)

2024年8月8日

[Typescript] Importing and Typing non-code files in Typescript

摘要： Here we're attempting to import several PNG files into our TypeScript program: import pngUrl1 from "./example1.png"; // red squiggly line under "./exa 阅读全文

posted @ 2024-08-08 19:20 Zhentiw 阅读(22) 评论(0) 推荐(0)

[Typescript] The declare module Syntax in TypeScript

摘要： Here we're importing a function myModuleFunc from my-module: import { myModuleFunc } from "my-module"; // red squiggly line under "my-module" Let's st 阅读全文

posted @ 2024-08-08 19:17 Zhentiw 阅读(24) 评论(0) 推荐(0)

[Typescript] tsconfig libs and target

摘要： In tsconfig file, you have targetand libsconfiguration. You always need to define a target, recommended as es2022 Specifying the lib option also lets 阅读全文

posted @ 2024-08-08 19:01 Zhentiw 阅读(21) 评论(0) 推荐(0)

2024年8月7日

[Javascript] Proper Tail Calls

摘要： Docs: https://webkit.org/blog/6240/ecmascript-6-proper-tail-calls-in-webkit/ /* This is a recursive function without PTC */ function fatorial(n) { if 阅读全文

posted @ 2024-08-07 19:29 Zhentiw 阅读(11) 评论(0) 推荐(0)

[Typescript] Using Variables Declared Elsewhere

摘要： The declare keyword in TypeScript allows you to specify types for global variables. Whenever you use it, an ambient context is created, which means th 阅读全文

posted @ 2024-08-07 19:13 Zhentiw 阅读(12) 评论(0) 推荐(0)

[Typescript] "script" vs "module"

摘要： Typescript check a file whether it contains any export/import, if it is, then it's a module; if not then it's a script. What's the difference between 阅读全文

posted @ 2024-08-07 19:04 Zhentiw 阅读(14) 评论(0) 推荐(0)

[Typescript] Annotating the Errors Thrown by a Function

摘要： /** * How do we annotate the errors this function throws? */ type PossibleErrors = SyntaxError | DOMException; const getUserFromLocalStorage = (id: st 阅读全文

posted @ 2024-08-07 18:58 Zhentiw 阅读(11) 评论(0) 推荐(0)

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