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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.
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I nearly choked laughing. Thank you for this.
This was confusing for me as well. The description should be more descriptive for the non-mathmeticians.
The description should clarify that the method needs to return the value instead of printing it out.
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Breaks on testing '1.2.3.4'. I tried returning true, false, 0, '1.2.3.4', undefined and all failed.
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The description says to return the lyrics as an array but the comment in the code says to return them as a string.
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You might want to revise the description to specify that the radius must be positive. Currently it says it must be non-negative but then fails if a radius of 0 is calculated and returned.