Capitalize
提出詳細
type Mapping = { "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 `${infer F}${infer R}` ? F extends keyof Mapping ? `${Mapping[F]}${R}` : S : S
| 提出日時 | 2023-08-08 16:21:10 |
|---|---|
| 問題 | Capitalize |
| ユーザー | ookkoouu |
| 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'>>, ]