Introducing the Map Method in Javascript ES6

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The map method is a part of ES6 that is especially useful for React developers. You can call array.map() on any array in your code to create a new array which is populated by'mapping' each element in array1 to array2. What actually ends up in array2 is determined by the callback function you passed into the map method as an argument. The 'map' method is really useful in React, particularly for looping over an array inside JSX. It keeps your code neat and saves you from having to call functions that exist outside of your JSX to do this.