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feat: tuple-to-union

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antfu 2020-07-26 09:25:03 +08:00
parent 378a6f56c4
commit ccf901b505
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questions/10-medium-tuple-to-union/README.md Normal file
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<!--info-header-start--><h1>Deep Readonly <img src="https://img.shields.io/badge/-medium-eaa648" alt="medium"/> <img src="https://img.shields.io/badge/-%23readonly-999" alt="#readonly"/> <img src="https://img.shields.io/badge/-%23object--keys-999" alt="#object-keys"/> <img src="https://img.shields.io/badge/-%23deep-999" alt="#deep"/></h1><blockquote><p>by Anthony Fu <a href="https://github.com/antfu" target="_blank">@antfu</a></p></blockquote><a href="https://type-challenges.netlify.app/case/9/play" target="_blank"><img src="https://img.shields.io/badge/-Take%20the%20Challenge-3178c6?logo=typescript" alt="Take the Challenge"/></a> <br><br><!--info-header-end-->
Implement a generic `TupleToUnion<T>` which covers the values of a tuple to its values union.
For example
```ts
type Arr = ['1', '2', '3']
const a: TupleToUnion<X> // expected to be '1' | '2' | '3'
```
<!--info-footer-start--><a href="../../README.md" target="_blank"><img src="https://img.shields.io/badge/-Back-grey" alt="Back"/></a> <a href="https://type-challenges.netlify.app/case/9/solutions" target="_blank"><img src="https://img.shields.io/badge/-Check%20out%20Solutions-de5a77?logo=awesome-lists&logoColor=white" alt="Check out Solutions"/></a> <a href="https://type-challenges.netlify.app/case/9/answer" target="_blank"><img src="https://img.shields.io/badge/-Share%20your%20Solutions-green" alt="Share your Solutions"/></a> <!--info-footer-end-->

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questions/10-medium-tuple-to-union/info.yml Normal file
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title: Tuple to Union
author:
name: Anthony Fu
email: hi@antfu.me
github: antfu
tags: infer, tuple, union

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questions/10-medium-tuple-to-union/info.zh-CN.yml Normal file
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title: 元组转合集

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questions/10-medium-tuple-to-union/template.ts Normal file
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type TupleToUnion<T> = any

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questions/10-medium-tuple-to-union/test-cases.ts Normal file
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import { Equal, Expect } from '@type-challenges/utils'
type cases = [
Expect<Equal<TupleToUnion<[123, '456', true]>, 123 | '456' | true>>,
Expect<Equal<TupleToUnion<[123]>, 123>>,
]