How Can I Map Over Object Values in JavaScript Like Array.map()?

Map Function for Objects (Alternative to Array.map)

JavaScript's Array.prototype.map function provides a convenient way to modify an array's values. But what about a similar operation for objects?

Object.prototype.map Alternative

While JavaScript doesn't offer a native map function for objects, we can create a custom solution that achieves the same functionality:

var myObject = { 'a': 1, 'b': 2, 'c': 3 };

Object.keys(myObject).forEach(function(key, index) {
  myObject[key] *= 2;
});

console.log(myObject);
// Output: { 'a': 2, 'b': 4, 'c': 6 }

This code uses the Object.keys method to retrieve the object's keys, iterates over them using forEach, and modifies the value associated with each key. The resulting newObject is now:

{ 'a': 2, 'b': 4, 'c': 6 }

This approach provides a simple and effective alternative to a native map function for objects. It's particularly useful when working with objects in Node.JS, where cross-browser compatibility is not a concern.

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