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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
This is brilliant!
obviously like my solution
Premature optimisation. What if new day will be added?
very clever, i like this
well using list comprehension is more efficient as it only iterate through the characters one time but in this solution it iterate through the character 10 times, because .replace() iterate through the string in the background.