freeCodeCamp/guide/english/certifications/javascript-algorithms-and-data-structures/functional-programming/use-the-map-method-to-extract-data-from-an-array/index.md

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Use the map Method to Extract Data from an Array

Use the map Method to Extract Data from an Array

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Hints

Hint 1

array.prototype.map takes a function as in input and returns an array. The returned array includes elements that is processed by the function. This function takes individual elements as input.

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Solutions

Solution 1 (Click to Show/Hide)

const rating = watchList.map(item => ({
  title: item["Title"],
  rating: item["imdbRating"]
}));

Code Explanation

Using ES6 notation, each item in array is processed to extract title and rating. Parantheses are needed to return an object.

Relevant Links

• Arrow Functions