Implement StartsWith<T, U> which takes two exact string types and returns whether T starts with U
For example
type a = StartsWith<'abc', 'ac'> // expected to be false
type b = StartsWith<'abc', 'ab'> // expected to be true
type c = StartsWith<'abc', 'abcd'> // expected to be false
/* _____________ Your Code Here _____________ */
type StartsWith<T extends string, U extends string> = T extends `${U}${string}` ? true: false
/* _____________ Test Cases _____________ */
import type { Equal, Expect } from '@type-challenges/utils'
type cases = [
Expect<Equal<StartsWith<'abc', 'ac'>, false>>,
Expect<Equal<StartsWith<'abc', 'ab'>, true>>,
Expect<Equal<StartsWith<'abc', 'abc'>, true>>,
Expect<Equal<StartsWith<'abc', 'abcd'>, false>>,
Expect<Equal<StartsWith<'abc', ''>, true>>,
Expect<Equal<StartsWith<'abc', ' '>, false>>,
Expect<Equal<StartsWith<'', ''>, true>>,
]标签：StartsWith,Typescript,false,_____________,true,47,Medium,Expect,type From： https://www.cnblogs.com/Answer1215/p/16790249.html