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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.
Yes the result = 4, in this case.
Great! Thanks a lot!
See this: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions
just wanted to ask, don't we need to use 'return' to return the result? Maybe I'm missing something
what if we have all elements same? For example, there are six 1's in the array. Should the result give us 4?