// let setup = function() {

// }

​

function setup() {

    let arr = [1, 3, 4, 6];

​

    // console.log(arr);

    // coding intensive way to double all items in an array

    // for (let i = 0; i < arr.length; i++) {

    //  arr[i] *= 2;

    // }

​

    // using higher order JS array function "map"

    // expects a function to be passed in as argument

    // arr = arr.map(doubleIt); 

    // x becomes every element of an array:

    //  function doubleIt(x){

    //      return x*2;

    //  }

​

    // same as above, but with anonymous function

    //  arr = arr.map(function(x){

    //      return x*2;

    //  }); 

​

    // same as above, but with anonymous ARROW function

    // arr = arr.map((x) => {

    //  return x*2;

    // });

​

    // same as above, but with anonymous ARROW stripped down

    // 'lambda function'

    //  arr = arr.map(x => x*2);

​

​

    //  console.log(arr);

​

​

    // demonstration of 'higher order' functions...

    // this function returns a function as a result

    //  function multiplier(factor) {

    //      return function(x) {

    //          return x * factor;

    //      }

    //  }

    //  let doubler = multiplier(2);

    //  let tripler = multiplier(3);

​

    //  console.log(doubler(2));

    //  console.log(tripler(2));

​

    let cat = {

        name: "jojo",

        age: 9,

        type: "calico"

    };

    let catArr = [];

    for (let i = 0; i<10; i++){

        let c = Object.assign({}, cat);

        catArr.push(c);

    }

    console.log(catArr);

    for (let kitty of catArr){

        for (let prop in kitty){

            console.log(kitty[prop]);

        }

    }

​

​

​

}