javascript map array of objects get key 1

javascript map array of objects get key

var foo = {
  'alpha': 'puffin',
  'beta': 'beagle'
};

var keys = Object.keys(foo);
console.log(keys) // ['alpha', 'beta'] 
// (or maybe some other order, keys are unordered).

Here is what the above code is Doing:
1. We create an object called foo.
2. We call Object.keys(foo) to get an array of the keys in foo.
3. We log the array to the console.

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