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Globals in TypeScript?! 🤯 declare global is a super useful tool for when you want to allow types to cross module boundaries. Here, we create a Global 阅读全文
posted @ 2022-10-18 01:18
Zhentiw
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Given a tuple type T that only contains string type, and a type U, build an object recursively. type a = TupleToNestedObject<['a'], string> // {a: str 阅读全文
posted @ 2022-10-17 14:53
Zhentiw
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Implement the type version of Array.shift For example type Result = Shift<[3, 2, 1]> // [2, 1] /* _____________ Your Code Here _____________ */ type S 阅读全文
posted @ 2022-10-17 14:41
Zhentiw
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const { of } = require("rxjs"); const { mergeMap, map, delay, catchError } = require("rxjs/operators"); describe("subscribe & assert testing in RxJS", 阅读全文
posted @ 2022-10-17 14:12
Zhentiw
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Implement the type version of Object.entries For example interface Model { name: string; age: number; locations: string[] | null; } type modelEntries 阅读全文
posted @ 2022-10-16 17:08
Zhentiw
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Implement the generic Mutable<T> which makes all properties in T mutable (not readonly). For example interface Todo { readonly title: string readonly 阅读全文
posted @ 2022-10-15 20:36
Zhentiw
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Want to turn a module into a type? You can use typeof import('./') to grab the type of any module, even third-party ones. Here, we create a type from 阅读全文
posted @ 2022-10-15 20:27
Zhentiw
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For example we have a search input: const input$ = fromEvent(document.getElementById("#input"), "input"); input$ .pipe( debounceTime(200), pluck("targ 阅读全文
posted @ 2022-10-14 20:56
Zhentiw
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const { TestScheduler } = require("rxjs/testing"); const { map, take, delay, mapTo, catchError } = require("rxjs/operators"); const { concat, from, of 阅读全文
posted @ 2022-10-14 20:24
Zhentiw
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describe("Marble testing in Rxjs", () => { let testScheduler; beforeEach(() => { testScheduler = new TestScheduler((actual, expected) => { expect(actu 阅读全文
posted @ 2022-10-14 20:20
Zhentiw
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