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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.
Actually is multiplied by 0.5 liters of water.
Now you can easily change the hard-coded 0.5 to the new amount of water in the variable and the code will be the same.
Using divide by 2 just change the amount of water to 750ml and all code needs to be refactored.