Function getQueryStringValueFromPath

docs/lib/ReactRouter.js:2376–2379

(path, key)

	}

	function getQueryStringValueFromPath(path, key) {
	  var match = path.match(new RegExp('\\?.*?\\b' + key + '=(.+?)\\b'));
	  return match && match[1];
	}

	var DefaultQueryKey = '_k';