Array Map Exercises

Use the built-in .map() method on arrays to solve all of these problems

Feel free to copy and paste the function and tests in this assignment.

1) Make an array of numbers that are doubles of the first array

function doubleNumbers(arr){
  // your code here
}

console.log(doubleNumbers([2, 5, 100])); // [4, 10, 200]

2) Take an array of numbers and make them strings

function stringItUp(arr){
  // your code here
}

console.log(stringItUp([2, 5, 100])); // ["2", "5", "100"]

3) Capitalize each of an array of names

function capitalizeNames(arr){
  // your code here
}

console.log(capitalizeNames(["john", "JACOB", "jinGleHeimer", "schmidt"])); // ["John", "Jacob", "Jingleheimer", "Schmidt"]

4) Make an array of strings of the names

function namesOnly(arr){
  // your code here
}

console.log(namesOnly([
    {
        name: "Angelina Jolie",
        age: 80
    },
    {
        name: "Eric Jones",
        age: 2
    },
    {
        name: "Paris Hilton",
        age: 5
    },
    {
        name: "Kayne West",
        age: 16
    },
    {
        name: "Bob Ziroll",
        age: 100
    }
])); 
// ["Angelina Jolie", "Eric Jones", "Paris Hilton", "Kayne West", "Bob Ziroll"]

5) Make an array of strings of the names saying whether or not they can go to The Matrix

function makeStrings(arr){
  // your code here
}

console.log(makeStrings([
    {
        name: "Angelina Jolie",
        age: 80
    },
    {
        name: "Eric Jones",
        age: 2
    },
    {
        name: "Paris Hilton",
        age: 5
    },
    {
        name: "Kayne West",
        age: 16
    },
    {
        name: "Bob Ziroll",
        age: 100
    }
])); 
// ["Angelina Jolie can go to The Matrix", 
// "Eric Jones is under age!!", 
// "Paris Hilton is under age!!", 
// "Kayne West is under age!!", 
// "Bob Ziroll can go to The Matrix"]

6) Make an array of the names in h1s, and the ages in h2s

function readyToPutInTheDOM(arr){
  // your code here
}
console.log(readyToPutInTheDOM([
    {
        name: "Angelina Jolie",
        age: 80
    },
    {
        name: "Eric Jones",
        age: 2
    },
    {
        name: "Paris Hilton",
        age: 5
    },
    {
        name: "Kayne West",
        age: 16
    },
    {
        name: "Bob Ziroll",
        age: 100
    }
])); 
// ["<h1>Angelina Jolie</h1><h2>80</h2>", 
// "<h1>Eric Jones</h1><h2>2</h2>", 
// "<h1>Paris Hilton</h1><h2>5</h2>", 
// "<h1>Kayne West</h1><h2>16</h2>", 
// "<h1>Bob Ziroll</h1><h2>100</h2>"]