DeathlyHallows

```ts // 你的答案 type LookUp = U extends { type:T } ? U : never ```

```ts // 你的答案 declare function PromiseAll(values: readonly [...T]): Promise ```

```ts // 你的答案 type Pop = T extends [...infer R,any] ? R : never ```

```ts // 你的答案 type Last = T extends [...any[],infer R] ? R : never ```

```ts // 你的答案 type ReplaceAll = From extends '' ? S : S extends `${infer L}${From}${infer R}` ? `${L}${To}${ReplaceAll}` : S ```

```ts // 你的答案 type TupleToUnion = T[number] ```

```ts // 你的答案 type DeepReadonly = { readonly [P in keyof T]: keyof T[P] extends never ? T[P] : DeepReadonly } ```

```ts // 你的答案 type MyReadonly2 = { [P in keyof T as P extends Exclude ? P : never]:T[P] } & { readonly [ P in keyof T as P...

```ts // 你的答案 type MyOmit = { [P in Exclude]:T[P] } ```

```ts // 你的答案 type MyReturnType any> = T extends (...args:any) => infer R ? R : any ```