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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.
The argument isn't being assigned to a function. The function name required by the kata (stringToNumber) is being assigned to an existing function. This is similar:
var rand = Math.random
now you have a function, rand, that can do the same thing Math.random can.
Woah that's cool. I didn't know argument could be asigned to a function and the function would be performed on it.
one dot is for decimal and other is access
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