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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
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// 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
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// 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
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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
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/* * 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
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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
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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
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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
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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
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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
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