type-challenges | Collection of TypeScript type challenges with online judge | Frontend Framework library

 by   type-challenges TypeScript Version: Current License: MIT

kandi X-RAY | type-challenges Summary

kandi X-RAY | type-challenges Summary

type-challenges is a TypeScript library typically used in User Interface, Frontend Framework, React, Nodejs applications. type-challenges has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.

Collection of TypeScript type challenges. English | 简体中文 | 日本語 | 한국어.

            kandi-support Support

              type-challenges has a medium active ecosystem.
              It has 34514 star(s) with 3614 fork(s). There are 136 watchers for this library.
              It had no major release in the last 6 months.
              There are 24852 open issues and 2673 have been closed. On average issues are closed in 0 days. There are 23 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of type-challenges is current.

            kandi-Quality Quality

              type-challenges has 0 bugs and 0 code smells.

            kandi-Security Security

              type-challenges has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              type-challenges code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              type-challenges is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              type-challenges releases are not available. You will need to build from source code and install.

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            type-challenges Key Features

            No Key Features are available at this moment for type-challenges.

            type-challenges Examples and Code Snippets

            No Code Snippets are available at this moment for type-challenges.

            Community Discussions


            TypeScript spread operator transform boolean to true | false when type compute
            Asked 2022-Mar-25 at 22:16

            I'm taking type-challenge exercise with the easy part, implement the type version of Unshift.(https://github.com/type-challenges/type-challenges/tree/master/questions/3060-easy-unshift) Here is my code:



            Answered 2022-Mar-25 at 22:16

            The reason you get a union result type is that boolean is a union (true | false) and conditional types distribute over union types (docs). Because of this, Unshift<['1', 2, '3'], boolean> evaluates to Unshift<['1', 2, '3'], true> | Unshift<['1', 2, '3'], false>.

            You can prevent it from happening by surrounding both sides of the extends condition with square brackets:

            Source https://stackoverflow.com/questions/71623337


            Recursively typed function definition in typescript
            Asked 2022-Mar-08 at 00:09

            I have the following type in typescript:



            Answered 2022-Mar-07 at 22:11

            This can be achieved with classes and generics. You could also go with using functions and returning objects, but I find it easier with classes. Here's a possible solution:

            Source https://stackoverflow.com/questions/71387427


            what's the difference between the two Pick util type implementations
            Asked 2022-Jan-11 at 09:08

            I'm trying this: https://github.com/type-challenges/type-challenges/blob/master/questions/4-easy-pick/README.md

            I can't understand the difference between them:



            Answered 2022-Jan-11 at 09:08


            How to declare a class type with type aliases?
            Asked 2021-Nov-15 at 12:01


            Answered 2021-Aug-15 at 09:16

            TPoint is defined as having the new OR the prototype attributes. It's a union type.

            While typeof Point has necessarily both, it's a sum type.

            A + B is a subset of A | B but the reverse is not true.

            If you want the sum type, you can write TPoint like this instead:

            Source https://stackoverflow.com/questions/68788959


            what is "extends never" used for?
            Asked 2021-Aug-07 at 14:58

            Here is an implementation of DeepReadonly (taken from here, which is a solution to this challenge).



            Answered 2021-Aug-07 at 14:47

            I have all the same questions you do, I think. The short answer is that I don't think it's a great implementation of DeepReadonly, with no offense meant to whoever wrote it.

            So keyof T extends never means that there are no known keys of the T type, since the keyof operator produces a union of known keys, and the never type is TypeScript's bottom type, a type which has no values at all. That means keyof T extends never behaves like this:

            Source https://stackoverflow.com/questions/68693054


            What's the difference between string[] and non-fixed-length string tuple?
            Asked 2021-Aug-01 at 13:24
            import {Equal} from '@type-challenges/utils';
            type StringTuple = [string, ...string[]]; // Tuples also support rest elements
            let d: StringTuple = ['a', 'b', 'c'];
            let e: StringTuple = ['a', 'b', 'c', 'd', 'e'];
            type R = Equal; // false


            Answered 2021-Aug-01 at 13:15

            Your StringTuple is defined as starting with a string. You can't e.g. assign an empty array (or even string[]!) to a StringTuple variable:

            Source https://stackoverflow.com/questions/68610761


            Typescript Symbol.species typing inference
            Asked 2021-Jun-03 at 19:57

            Let's say I have a custom MyArray class that extends upon the builtin Array class, how should I type so that myMap(myArr: MyArray, ) can correctly infer the return type as MyArray, instead of the builtin Array?

            PS: I want this type declaration to be as general as possible, which is why I didn't simply overload the map method. That way, I can easily change the signature for type variable Arr in myArr to Iterable, and this can also be used on other builtin/custom classes like Set that implements the Iterable Protocol. Right now the best I could do is to have the user specify their desired return type as a generic function variable.



            Answered 2021-Jun-03 at 19:57

            I believe you dont have to specify any static properties, because then you have to implement them all.

            Since you want to override some of Array.prototype methods, I think it is better to type only those methods which you are interested in.

            Source https://stackoverflow.com/questions/67815551

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


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