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Provide application level module in bootstrapApplication bootstrapApplication(AppComp, { providers: [ importProvidersFrom(HttpClinetModule) ] }) //BAD 阅读全文
posted @ 2022-10-02 21:35
Zhentiw
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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
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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
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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
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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
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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
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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
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Implement Python liked any function in the type system. A type takes the Array and returns true if any element of the Array is true. If the Array is e 阅读全文
posted @ 2022-09-28 01:39
Zhentiw
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microtask -> requestAnimationFrame -> macrotask Each scheduler can just take callback as arguement asyncScheduler.schedule(() => console.log('async')) 阅读全文
posted @ 2022-09-27 21:41
Zhentiw
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Get an Object that is the difference between O & O1 /* _____________ Your Code Here _____________ */ type Diff<T, S> = { [K in Exclude<(keyof T | keyo 阅读全文
posted @ 2022-09-27 01:47
Zhentiw
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