Zhentiw - 博客园

2022年10月22日

[RxJS] Use filter and partition for conditional logic

摘要： // begin lesson code import { fromEvent, partition } from 'rxjs'; import { filter, pluck } from 'rxjs/operators'; const MOVE_SPEED = 20; let leftPosit 阅读全文

posted @ 2022-10-22 16:31 Zhentiw 阅读(60) 评论(0) 推荐(0)

[RxJS] Automate unsubscribe process with takeUntil

摘要： const onDestroy$ = new Subject(); fromEvent(document, 'click').pipe( map((event: any) => ({ x: event.clientX, y: event.clientY })), takeUntil(onDestro 阅读全文

posted @ 2022-10-22 16:20 Zhentiw 阅读(32) 评论(0) 推荐(0)

[RxJS] Extract common operator logic into standalone function

摘要： /* * From */ click$.pipe( mergeMapTo(throwError({ status: 400, message: 'Server error' }).pipe( retryWhen(attempts => { return attempts.pipe( mergeMap 阅读全文

posted @ 2022-10-22 16:13 Zhentiw 阅读(30) 评论(0) 推荐(0)

[Typescript] Tips: Use assertion functions inside classes

摘要： You can do some really, really neat stuff with assertion functions inside classes. Here, we assert that the user is logged in and get proper inference 阅读全文

posted @ 2022-10-22 02:23 Zhentiw 阅读(31) 评论(0) 推荐(0)

2022年10月21日

[Typescript] 62. Medium - Fibonacci Sequence

摘要： Implement a generic Fibonacci<T> that takes a number T and returns its corresponding Fibonacci number. The sequence starts: 1, 1, 2, 3, 5, 8, 13, 21, 阅读全文

posted @ 2022-10-21 18:40 Zhentiw 阅读(23) 评论(0) 推荐(0)

[Typescript] 61. Medium. - Flip

摘要： Implement the type of just-flip-object. Examples: Flip<{ a: "x", b: "y", c: "z" }>; // {x: 'a', y: 'b', z: 'c'} Flip<{ a: 1, b: 2, c: 3 }>; // {1: 'a' 阅读全文

posted @ 2022-10-21 18:34 Zhentiw 阅读(28) 评论(0) 推荐(0)

2022年10月20日

[Typescript] 60. Medium - OmitByType

摘要： From T, pick a set of properties whose type are not assignable to U. For Example type OmitBoolean = OmitByType<{ name: string count: number isReadonly 阅读全文

posted @ 2022-10-20 18:44 Zhentiw 阅读(32) 评论(0) 推荐(0)

[Typescript] 59. Medium - InorderTraversal

摘要： Implement the type version of binary tree inorder traversal. For example: const tree1 = { val: 1, left: null, right: { val: 2, left: { val: 3, left: n 阅读全文

posted @ 2022-10-20 18:41 Zhentiw 阅读(33) 评论(0) 推荐(0)

[Typescript] 58. Medium - BEM style string

摘要： The Block, Element, Modifier methodology (BEM) is a popular naming convention for classes in CSS. For example, the block component would be represente 阅读全文

posted @ 2022-10-20 18:29 Zhentiw 阅读(28) 评论(0) 推荐(0)

[RxJS] catchError

摘要： catchError will complete the observable, so be careful where you put the catchError: import { fromEvent, empty } from 'rxjs'; import { ajax } from 'rx 阅读全文

posted @ 2022-10-20 14:43 Zhentiw 阅读(139) 评论(0) 推荐(0)

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