############################
# USE TYPE AS KEY OF OBJECT#
############################
type DayOfTheWeek = "sunday" | "monday" | "tuesday" | "wednesday" | "thursday" | "friday" | "saturday";

type ChoresMap = { [day in DayOfTheWeek]: string };

const chores: ChoresMap = { // ERROR! Property 'saturday' is missing in type '...'
    "sunday": "do the dishes",
    "monday": "walk the dog",
    "tuesday": "water the plants",
    "wednesday": "take out the trash",
    "thursday": "clean your room",
    "friday": "mow the lawn",
};

##########################################
# USE TYPE AS KEY OF OBJECT with GENERICS#
##########################################
type DayOfTheWeek = "sunday" | "monday" | "tuesday" | "wednesday" | "thursday" | "friday" | "saturday";

type DayOfTheWeekMap<T> = { [day in DayOfTheWeek]: T };

const chores: DayOfTheWeekMap<string> = {
    "sunday": "do the dishes",
    "monday": "walk the dog",
    "tuesday": "water the plants",
    "wednesday": "take out the trash",
    "thursday": "clean your room",
    "friday": "mow the lawn",
    "saturday": "relax",
};

const workDays: DayOfTheWeekMap<boolean> = {
    "sunday": false,
    "monday": true,
    "tuesday": true,
    "wednesday": true,
    "thursday": true,
    "friday": true,
    "saturday": false,
}

#########################
#EXCLUDE ITEMS FROM TYPE#
#########################

interface CreditCardOwnerInformationUIDTO {
  floor: string;
  department: string;
  postalCode: string;
}

type TGetValues = Pick<
  CreditCardOwnerInformationUIDTO,
  Exclude<keyof CreditCardOwnerInformationUIDTO, 'floor' | 'department'>
>;

// TGetValues should be = postalCode: string;


##################################
# UNION TYPE BASED ON OBJECT KEYS#
##################################

const paymentTypes = {
  prepaid: 'foo',
  at_destination: 'bar',
  advance_payment: 'foo bar',
};

type p = keyof typeof paymentTypes;

// P must be = "prepaid" | "at_destination" | "advance_payment";