Zhentiw - 博客园

2022年10月23日

摘要： Implement type AllCombinations<S> that return all combinations of strings which use characters from S at most once. For example: type AllCombinations_ 阅读全文

posted @ 2022-10-23 02:34 Zhentiw 阅读(39) 评论(0) 推荐(0)

[Typescript] 63. Medium - Greater Than

摘要： In This Challenge, You should implement a type GreaterThan<T, U> like T > U Negative numbers do not need to be considered. For example GreaterThan<2, 阅读全文

posted @ 2022-10-23 02:04 Zhentiw 阅读(31) 评论(0) 推荐(0)

2022年10月22日

[RxJS] Append values to a stream using startWith and endWith (countdown$)

摘要： // begin lesson code import { interval, fromEvent, of } from 'rxjs'; import { scan, mapTo, takeWhile, takeUntil, tap, startWith, endWith } from 'rxjs/ 阅读全文

posted @ 2022-10-22 16:43 Zhentiw 阅读(36) 评论(0) 推荐(0)

[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(64) 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(36) 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(37) 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(27) 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(33) 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(37) 评论(0) 推荐(0)

Answer1215

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