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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.
@Voile I completely agree with the usefulness of a diagram and I did consider it, however overall I thought it would make things too obvious and easy.
@Voile, I'll try and think of another way of writing this, thank you for the feedback
@Voile, I've updated the description, let me know if I missed anything,thank you
Thank you @Voile for the feedback, I will fix this
Very cool
Remember you only need to return a boolean, so you don't really need mathematics at all, simply an understanding of probability
Just removed the hack, this version should be deleted
I thought 120 should be included as an incrementing number... Now I realise the trailing "0" should only come after "9"... Hence my hack
arr.join('') !== '120'