Zhentiw - 博客园

2022年10月3日

[Typescript] Tips: Use 'extends' keyword to narrow the value of a generic

摘要： export const getDeepValue = <Obj, FirstKey extends keyof Obj, SecondKey extends keyof Obj[FirstKey]>( obj: Obj, firstKey: FirstKey, secondKey: SecondK 阅读全文

posted @ 2022-10-03 18:10 Zhentiw 阅读(4) 评论(0) 推荐(0) 编辑

[RxJS] Create a scroll progress bar

摘要： // begin lesson code import { fromEvent } from 'rxjs'; import { map } from 'rxjs/operators'; /* * Calculate progress based on scroll position */ funct 阅读全文

posted @ 2022-10-03 14:12 Zhentiw 阅读(18) 评论(0) 推荐(0) 编辑

[RxJS] Execute tasks asynchronously with Async Scheduler

摘要： The asyncScheduler lets you schedule tasks asynchronously, similar to a setTimeout. All schedulers have a signature of work, delay, state, but provdin 阅读全文

posted @ 2022-10-03 14:01 Zhentiw 阅读(35) 评论(0) 推荐(0) 编辑

2022年10月2日

[Angular] Standalone component - routes top level provide share for all child routes

摘要： Provide application level module in bootstrapApplication bootstrapApplication(AppComp, { providers: [ importProvidersFrom(HttpClinetModule) ] }) //BAD 阅读全文

posted @ 2022-10-02 21:35 Zhentiw 阅读(26) 评论(0) 推荐(0) 编辑

2022年10月1日

[Algorithm] Kadane's Algorithm

摘要： Write a function that takes in a non-empty array of integers and returns the maximum sum that can be obtained by summing up all of the integers in a n 阅读全文

posted @ 2022-10-01 16:36 Zhentiw 阅读(34) 评论(0) 推荐(0) 编辑

2022年9月30日

[Typescript] 41. Medium - IsUnion

摘要： Implement a type IsUnion, which takes an input type T and returns whether T resolves to a union type. For example: type case1 = IsUnion<string> // fal 阅读全文

posted @ 2022-09-30 02:49 Zhentiw 阅读(8) 评论(0) 推荐(0) 编辑

2022年9月28日

[Typescript] 40. Medium - IsNever

摘要： Implement a type IsNever, which takes input type T. If the type of resolves to never, return true, otherwise false. For example: type A = IsNever<neve 阅读全文

posted @ 2022-09-28 21:47 Zhentiw 阅读(20) 评论(0) 推荐(0) 编辑

[Typescript] Tips: Decode URL search params at the type level with ts-toolbelt

摘要： TypeScript's string interpolation powers are incredible, especially since 4.1. Add some utilities from ts-toolbelt, and you've got a stew going. Here, 阅读全文

posted @ 2022-09-28 21:37 Zhentiw 阅读(56) 评论(0) 推荐(0) 编辑

[RxJS] Subscription add()

摘要： You can use subsciprtion.add(anotherSubscription)to combine subscriptions and cancel them at the same time. import { Observable } from 'rxjs'; const o 阅读全文

posted @ 2022-09-28 14:12 Zhentiw 阅读(108) 评论(0) 推荐(0) 编辑

[Typescript] Tips: Use 'in' operator to transform a union to another union(watched)

摘要： We want to convert export type Entity = | {type: "user"} | {type: "post"} | {type: "comment"} to type EntityWithId = | {type: "user", userId: string} 阅读全文

posted @ 2022-09-28 14:03 Zhentiw 阅读(4) 评论(0) 推荐(0) 编辑

Answer1215

公告