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Map

Initialize

var mapName = make(map[keyType]dataType)

Add values

userData["firstName"] = firstName

A list of maps

var bookings = make([]map[string]string, 0)

declared as 0 because it will increase automatically anways

Structs

Structs can mix up data types

Initialize

type UserData struct {
	firstName string
	lastName string
	email string
	numberOfTickets uint
}

Use it

var bookings = make([]UserData, 0)

bookings[0].firstName