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114 - CamelCase<T> #360

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okatechnology opened this issue Nov 20, 2020 · 1 comment

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okatechnology commented Nov 20, 2020

type CamelCase<S extends string> = S extends Lowercase<S>
  ? S extends `${infer F}_${infer RF}${infer R}`
    ? `${F}${Uppercase<RF>}${CamelCase<R>}`
    : S
  : CamelCase<Lowercase<S>>;

okatechnology added answer en labels

github-actions bot added the 114 label

WisestCoder commented Apr 20, 2023

type IsGap<T extends string> = Uppercase<T> extends Lowercase<T> ? true : false
type CamelCase<S extends string> = S extends Lowercase<S>
  ? S extends `${infer F}_${infer RF}${infer R}`
    ? RF extends '_'
      ? `${F}_${CamelCase<`_${R}`>}`
      : `${F}${IsGap<RF> extends true ? `_${RF}` : Uppercase<RF>}${CamelCase<R>}`
    : S
  : CamelCase<Lowercase<S>>

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