Zhentiw - 博客园

2022年12月12日

摘要： Example 1 import { S } from "ts-toolbelt"; import { Equal, Expect } from "../helpers/type-utils"; type Names = [ "Matt Pocock", "Jimi Hendrix", "Eric 阅读全文

posted @ 2022-12-12 15:20 Zhentiw 阅读(117) 评论(0) 推荐(0)

[Typescript] Infer from an Interface

摘要： In this exercise we have an interface MyComplexInterface which is acting as a type helper. The interface takes arguments for Event, Context, Name, and 阅读全文

posted @ 2022-12-12 15:08 Zhentiw 阅读(36) 评论(0) 推荐(0)

2022年12月11日

[Typescript] Get object prop value

摘要： import { Equal, Expect } from "../helpers/type-utils"; type GetPropValue< T extends Record<PropertyKey, any>, P extends keyof T = "data" > = T extends 阅读全文

posted @ 2022-12-11 22:33 Zhentiw 阅读(46) 评论(0) 推荐(0)

[Typescript] 136. Medium - NonEmptyArray

摘要： type NonEmptyArray<T> = [T, ...Array<T>]; export const makeEnum = (values: NonEmptyArray<string>) => {}; makeEnum(["a"]); makeEnum(["a", "b", "c"]); / 阅读全文

posted @ 2022-12-11 22:16 Zhentiw 阅读(20) 评论(0) 推荐(0)

[Typescript] Constraining Types for Anything but null or undefined (T extends {})

摘要： export type Maybe<T extends {}> = T | null | undefined; type tests = [ // @ts-expect-error Maybe<null>, // @ts-expect-error Maybe<undefined>, Maybe<st 阅读全文

posted @ 2022-12-11 22:11 Zhentiw 阅读(24) 评论(0) 推荐(0)

[Typescript] 135. Easy - Maybe helper

摘要： import { Equal, Expect } from "../helpers/type-utils"; type Maybe<T> = T | null | undefined; type tests = [ Expect<Equal<Maybe<string>, string | null 阅读全文

posted @ 2022-12-11 22:03 Zhentiw 阅读(19) 评论(0) 推荐(0)

[Typescript] 134. Easy - Identity Helper

摘要： import { Equal, Expect } from "../helpers/type-utils"; type Identity<T> = T; type tests = [ Expect<Equal<Identity<1>, 1>>, Expect<Equal<Identity<"1">, 阅读全文

posted @ 2022-12-11 22:01 Zhentiw 阅读(34) 评论(0) 推荐(0)

[Typescript] Create an Object Whose Keys Are Derived From a Union

摘要： Let's say we have type TemplateLiteralKey = `${"user" | "post" | "comment"}${"Id" | "Name"}`; We want to make a type type ObjectOfKeys = unknown; In o 阅读全文

posted @ 2022-12-11 21:57 Zhentiw 阅读(36) 评论(0) 推荐(0)

[Typescript] Create a Union of Strings with All Possible Permutations of Two Unions

摘要： Here we have a Sandwich type that's currently assigned to unknown We also have a couple of union types, BreadType and Filling, that have several optio 阅读全文

posted @ 2022-12-11 21:46 Zhentiw 阅读(39) 评论(0) 推荐(0)

[Typescript] Get All of an Object’s Values

摘要： Let's say we have an object as const: const frontendToBackendEnumMap = { singleModule: "SINGLE_MODULE", multiModule: "MULTI_MODULE", sharedModule: "SH 阅读全文

posted @ 2022-12-11 20:37 Zhentiw 阅读(32) 评论(0) 推荐(0)

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