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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.
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This comment is hidden because it contains spoiler information about the solution
This comment is hidden because it contains spoiler information about the solution
It simply searches for "3.50". Check the instructions, it's one of the things you are searching for
regexp
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Once again: USE A SPOILER FLAG!
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It makes the string raw. You can see there for details (3rd - 4th paragraph): https://docs.python.org/3/library/re.html
Actually here it is useless since there are no backslashes, but it's a habit I have using regular expressions.
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(manual notification, see above)
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It removes every zero by replacing each "0" with an "" - which is just an empty string
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