javascript map array of objects get key

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Charlene
06 Jan 2018
1var foo = {
2  'alpha': 'puffin',
3  'beta': 'beagle'
4};
5
6var keys = Object.keys(foo);
7console.log(keys) // ['alpha', 'beta'] 
8// (or maybe some other order, keys are unordered).
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