This forEach loop is going over all objects in an array and extracting some values from each item into a new array. There is already a `map` function in JavaScript to do this:

	var repo = nodeURL.parse(request.url, true).query.repo
	data_out[repo] = contribs.map(function(nextContrib){
		return {
			"login": nextContrib.login, 
			"contributions": nextContrib.contributions
		};
	});

More details [here](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map).