Zhentiw - 博客园

2024年8月7日

[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(20) 评论(0) 推荐(0)

[Typescript] Type incompatible function argument as never

摘要： For the following code: const objOfFunctions = { string: (input: string) => input.toUpperCase(), number: (input: number) => input.toFixed(2), boolean: 阅读全文

posted @ 2024-08-07 17:53 Zhentiw 阅读(31) 评论(0) 推荐(0)

2024年8月6日

[Typescript] Typing Functions with Object Params

摘要： import { expect, it, vitest } from 'vitest'; const logId = (obj: { id: string }) => { console.log(obj.id); }; const logName = (obj: { name: string }) 阅读全文

posted @ 2024-08-06 19:56 Zhentiw 阅读(27) 评论(0) 推荐(0)

[Typescript] Understanding TypeScript's Function Parameter Comparisons

摘要： Make those pass: import { Equal, Expect } from "@total-typescript/helpers"; type Event = "click" | "hover" | "scroll"; type CallbackType = unknown; co 阅读全文

posted @ 2024-08-06 15:13 Zhentiw 阅读(40) 评论(0) 推荐(0)

2024年8月2日

[CSS] max-content, min-content, fit-content

摘要： max-content https://developer.mozilla.org/en-US/docs/Web/CSS/max-content The max-content sizing keyword represents the maximum intrinsic size of the c 阅读全文

posted @ 2024-08-02 15:23 Zhentiw 阅读(48) 评论(0) 推荐(0)

[Typescript] Pipe function

摘要： function pipe<A, B>(fn: (a: A) => B) { function run(a: A) { return fn(a) } run.pipe = <C, >(fn2: (b: B) => C) => pipe((a: A) => fn2(fn(a))) return run 阅读全文

posted @ 2024-08-02 14:51 Zhentiw 阅读(33) 评论(0) 推荐(0)

[Typescript] Advance query builder example

摘要： type BaseTable = { [colName: string]: string | number | boolean; } type Columns<Tables extends { [tableName: string]: BaseTable }> = { [K in keyof Tab 阅读全文

posted @ 2024-08-02 14:50 Zhentiw 阅读(27) 评论(0) 推荐(0)

[Typescript] Query builder example

摘要： class QueryBuilder { private fields: string[] = [] private wheres: Record<string, string> = {} private table: string = "" select(...columns: string[]) 阅读全文

posted @ 2024-08-02 14:19 Zhentiw 阅读(29) 评论(0) 推荐(0)

2024年8月1日

[Typescript] Iterating Over Object Keys in Typescript

摘要： import { expect, it, vitest } from 'vitest'; interface User { id: number; name: string; } function printUser(user: User) { Object.keys(user).forEach(( 阅读全文

posted @ 2024-08-01 15:12 Zhentiw 阅读(31) 评论(0) 推荐(0)

[Typescript] Excess Properties in Functions

摘要： interface User { id: number; name: string; } const users = [ { name: 'Waqas', }, { name: 'Zain', }, ]; const usersWithIds: User[] = users.map((user, i 阅读全文

posted @ 2024-08-01 14:46 Zhentiw 阅读(26) 评论(0) 推荐(0)

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