Sort by Extension Sort by Extension
Simple
English

You are given a list of files. You need to sort this list by the file extension. The files with the same extension should be sorted by name.

Some possible cases:

  • Filename cannot be an empty string;
  • Files without the extension should go before the files with one;
  • Filename ".config" has an empty extension and a name ".config";
  • Filename "config." has an empty extension and a name "config.";
  • Filename "table.imp.xls" has an extension "xls" and a name "table.imp";
  • Filename ".imp.xls" has an extension "xls" and a name ".imp".

Input: A list of filenames.

Output: A list of filenames.

Example:

sort_by_ext(['1.cad', '1.bat', '1.aa']) == ['1.aa', '1.bat', '1.cad']
sort_by_ext(['1.cad', '1.bat', '1.aa', '2.bat']) == ['1.aa', '1.bat', '2.bat', '1.cad']
sort_by_ext(['1.cad', '1.bat', '1.aa', '.bat']) == ['.bat', '1.aa', '1.bat', '1.cad']
sort_by_ext(['1.cad', '1.bat', '.aa', '.bat']) == ['.aa', '.bat', '1.bat', '1.cad']
sort_by_ext(['1.cad', '1.', '1.aa']) == ['1.', '1.aa', '1.cad']
sort_by_ext(['1.cad', '1.bat', '1.aa', '1.aa.doc']) == ['1.aa', '1.bat', '1.cad', '1.aa.doc']

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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=py 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.

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