Qian Yu

```ts type MyAwaited = T extends PromiseLike ? P extends PromiseLike ? MyAwaited : P : never ```

```ts type TupleToObject = { [K in T[number]]: K } ```

```ts type MyOmit = { [K in keyof T as K extends U ? never : K]: T[K] } ```

```ts type MyReturnType any> = T extends (...args: any) => infer R ? R : never ```

```ts type MyReadonly = { readonly [K in keyof T]:T[K] } ```

```ts type MyPick = { [P in K]: T[P] } ```

```ts type DeepReadonly = { readonly [P in keyof T]: T[P] extends Function ? T[P] : DeepReadonly } ```

```ts type MyReadonly2 = { readonly [P in keyof T as P extends K ? P : never]: T[P] } & { [P in keyof T as P extends K...