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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.
thanks!
Time for using lower: 1.2828872501850128
Time for using in: 1.0886021964251995
I ran the tests a few times, and it seems using in is more time effective, but the difference is negligible.
is using name[0].lower()=="r" more efficient than using name[0] in "Rr" ?