I'd also like to know this. For any sort of web technology, CodePen or those you've mentioned is surely better as you get a live example of the code running. For anything else, a gist seems just as good!
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I'd also like to know this. For any sort of web technology, CodePen or those you've mentioned is surely better as you get a live example of the code running. For anything else, a gist seems just as good!