Capitalize
提出詳細
type Helper = { "a": "A", "b": "B", "c": "C", "d": "D", "e": "E", "f": "F", "g": "G", "h": "H", "i": "I", "j": "J", "k": "K", "l": "L", "m": "M", "n": "N", "o": "O", "p": "P", "q": "Q", "r": "R", "s": "S", "t": "T", "u": "U", "v": "V", "w": "W", "x": "X", "y": "Y", "z": "Z" } type MyCapitalize<S extends string> = S extends `${infer First extends keyof Helper}${infer Rest}` ? `${Helper[First]}${Rest}` : S
| 提出日時 | 2023-09-13 14:25:36 |
|---|---|
| 問題 | Capitalize |
| ユーザー | sankantsu |
| 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'>>, ]