utility-types.ts

interface User {
  email: string;
  password: string;
  avatar_url?: string;
}

// Partial<Type>
type PartialUser = Partial<User>;
/**
  type PartialUser = {
    email?: string | undefined;
    password?: string | undefined;
    avatar_url?: string | undefined;
  }
 */

// Required<Type>
type RequiredUser = Required<User>;
/**
  type RequiredUser = {
    email: string;
    password: string;
    avatar_url: string;
  }
 */

// Pick<Type, Keys>
type PickUser = Pick<User, "email" | "password">;
/**
 * type PickUser = {
 *  email: string;
 * password: string;
 * }
 * */

// Omit<Type, Keys>
type OmitUser = Omit<User, "email" | "password">;
/**
 * type OmitUser = {
 * avatar_url: string;
 * }
 * */

// Record

type LabelType = {
  label: string;
  color: string;
}

type UserRecord = Record<number, LabelType>;
/**
 * type UserRecord = {
 *  1: {
 *    label: string;
 *    color: string;
 *  }
 * }
 * */