Promisify A Callback Function Without 3rd Party Libraries

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I was recently working on some code in which I wanted to use Promises, but all that I had was callback-centric code. In the past, I have imported libraries such as bluebird for this particular problem, but now that seems like a bit of overkill to get just one function. I m already using ES6, so I don t need a polyfill in order to use Promises; all that I want is a simple promisify() function.…

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