Create a SnakeCase<T> generic that turns a string formatted in camelCase into a string formatted in snake_case.
A few examples:
type res1 = SnakeCase<"hello">; // => "hello"
type res2 = SnakeCase<"userName">; // => "user_name"
type res3 = SnakeCase<"getElementById">; // => "get_element_by_id"
/* _____________ Your Code Here _____________ */
type SnakeCase<T, ACC extends string = ''> = T extends `${infer F}${infer REST}`
? Uppercase<F> extends F
? SnakeCase<REST, `${ACC}_${Lowercase<F>}`>
: SnakeCase<REST,`${ACC}${F}`>
: ACC
/* _____________ Test Cases _____________ */
import type { Equal, Expect } from '@type-challenges/utils'
import { ExpectFalse, NotEqual } from '@type-challenges/utils'
type cases = [
Expect<Equal<SnakeCase<'hello'>, 'hello'>>,
Expect<Equal<SnakeCase<'userName'>, 'user_name'>>,
Expect<Equal<SnakeCase<'getElementById'>, 'get_element_by_id'>>,
Expect<Equal<SnakeCase<'getElementById' | 'getElementByClassNames'>, 'get_element_by_id' | 'get_element_by_class_names'>>,
]标签：Typescript,_____________,get,element,Expect,138,type,SnakeCase From： https://www.cnblogs.com/Answer1215/p/16985284.html