If you have 50 different plug types, appliances wouldn't be available and would be very
expensive. But once an electric outlet becomes standardized, many companies can design
appliances, and competition ensues, creating variety and better prices for consumers.
-- Bill Gates
Non-unique Elements
You are given a non-empty sequence of integers. For this task, you should return Array consisting of only the non-unique elements from the initial sequence. To do so you will need to remove all unique elements (elements which are contained in a given sequence only once). When solving this task, do not change the order of the elements. Example: in [1, 2, 3,...
You should be an authorized user in order to see the full description and start solving this mission.
Settings
CheckiO Extensions
CheckiO Extensions allow you to use local files to solve missions. More info in a blog post.
In order to install CheckiO client you'll need installed Python (version at least 3.8)
Install CheckiO Client first:
pip3 install checkio_client
Configure your tool
checkio --domain=js config --key=
Sync solutions into your local folder
checkio sync
(in beta testing) Launch local server so your browser can use it and sync solution between local file end extension on the fly. (doesn't work for safari)
checkio serv -d
Alternatevly, you can install Chrome extension or FF addon
checkio install-plugin
checkio install-plugin --ff
checkio install-plugin --chromium
Read more here about other functionality that the checkio client provides. Feel free to submit an issue in case of any difficulties.
Pair Programming (Beta-version)
Welcome to Pair Programming! Engage in real-time collaboration on coding projects by starting a session and sharing the provided unique URL with friends or colleagues. This feature is perfect for joint project development, debugging, or learning new skills together. Simply click 'Start Session' to begin your collaborative coding journey!
Waiting for Pair Programming to start...
You are trying to join a pair programming session that has not started yet.
Please wait for the session creator to join.
Waiting for Pair Programming to reconnect...
It looks like the creator of the pair programming session closed the editor window.
It might happen accidentally, so that you can wait for reconnection.
