Dictionary initialization

Arrays and collections / Dictionaries

//using objects
let d1 = {};

let numbers1 = {
    1: "one", 2: "two"
};

//using maps (ES6 feature)
let d2 = new Map()

let numbers2 = new Map([
        [ 1, "one" ],
        [ 2, "two" ]
])

let numbers3 = new Map(
    Object.entries(numbers1))

console.log("d1 is", d1)
console.log("d2 is", d2)
console.log("numbers1 is", numbers1)
console.log("numbers2 is", numbers2)
console.log("numbers2 is", numbers3)