Map()

Given data:

const items = [
    { name: 'Bike',     price: 100  },
    { name: 'TV',       price: 200  },
    { name: 'Album',    price: 10   },
    { name: 'Book',     price: 5    },
    { name: 'Phone',    price: 500  },
    { name: 'Computer', price: 1000 },
    { name: 'Keyboard', price: 25   }
]

Map

Map will let you take an array and turn it into an entirely new array while also allowing you to perform operations upon it

---

const itemPrice = items.map((item) => {
    return item.price + 100
})

in other languages map always reminded me of applying a function to each item in an array/vector so in this case it is

• take each item in items
• pass to arrow functions (the surgical table)
• operate upon it (add 100 to the item)
• build the return array
• assign the return array to the itemPrices constant which consists of the original array with each element having had its prices increased by 100