Capitalize
提出詳細
type MyUpper<S extends string> = S extends 'a' ? 'A' : S extends 'b' ? 'B' : S extends 'c' ? 'C' : S extends 'd' ? 'D' : S extends 'e' ? 'E' : S extends 'f' ? 'F' : S extends 'g' ? 'G' : S extends 'h' ? 'H' : S extends 'i' ? 'I' : S extends 'j' ? 'J' : S extends 'k' ? 'K' : S extends 'l' ? 'L' : S extends 'm' ? 'M' : S extends 'n' ? 'N' : S extends 'o' ? 'O' : S extends 'p' ? 'P' : S extends 'q' ? 'Q' : S extends 'r' ? 'R' : S extends 's' ? 'S' : S extends 't' ? 'T' : S extends 'u' ? 'U' : S extends 'v' ? 'V' : S extends 'w' ? 'W' : S extends 'x' ? 'X' : S extends 'y' ? 'Y' : S extends 'z' ? 'Z' : S type MyCapitalize<S extends string> = S extends `${infer First}${infer Rest}` ? `${MyUpper<First>}${Rest}` : ''
| 提出日時 | 2023-09-05 14:58:03 |
|---|---|
| 問題 | Capitalize |
| ユーザー | snaka |
| ステータス | Accepted |
import type { Equal, Expect } from '@type-challenges/utils' type cases = [ Expect<Equal<MyCapitalize<'foobar'>, 'Foobar'>>, Expect<Equal<MyCapitalize<'FOOBAR'>, 'FOOBAR'>>, Expect<Equal<MyCapitalize<'foo bar'>, 'Foo bar'>>, Expect<Equal<MyCapitalize<''>, ''>>, Expect<Equal<MyCapitalize<'a'>, 'A'>>, Expect<Equal<MyCapitalize<'b'>, 'B'>>, Expect<Equal<MyCapitalize<'c'>, 'C'>>, Expect<Equal<MyCapitalize<'d'>, 'D'>>, Expect<Equal<MyCapitalize<'e'>, 'E'>>, Expect<Equal<MyCapitalize<'f'>, 'F'>>, Expect<Equal<MyCapitalize<'g'>, 'G'>>, Expect<Equal<MyCapitalize<'h'>, 'H'>>, Expect<Equal<MyCapitalize<'i'>, 'I'>>, Expect<Equal<MyCapitalize<'j'>, 'J'>>, Expect<Equal<MyCapitalize<'k'>, 'K'>>, Expect<Equal<MyCapitalize<'l'>, 'L'>>, Expect<Equal<MyCapitalize<'m'>, 'M'>>, Expect<Equal<MyCapitalize<'n'>, 'N'>>, Expect<Equal<MyCapitalize<'o'>, 'O'>>, Expect<Equal<MyCapitalize<'p'>, 'P'>>, Expect<Equal<MyCapitalize<'q'>, 'Q'>>, Expect<Equal<MyCapitalize<'r'>, 'R'>>, Expect<Equal<MyCapitalize<'s'>, 'S'>>, Expect<Equal<MyCapitalize<'t'>, 'T'>>, Expect<Equal<MyCapitalize<'u'>, 'U'>>, Expect<Equal<MyCapitalize<'v'>, 'V'>>, Expect<Equal<MyCapitalize<'w'>, 'W'>>, Expect<Equal<MyCapitalize<'x'>, 'X'>>, Expect<Equal<MyCapitalize<'y'>, 'Y'>>, Expect<Equal<MyCapitalize<'z'>, 'Z'>>, ]