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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.
welcome to javascript
I wouldn't say it was a language issue. An incorrect verification method was used. 0 and -0 should be deemed the same, regardless of language pecularities.
This sounds like you are using Javascript, in which case your anger should be towards the language, not the kata. Feel free to pick a better language to use ;)
Also, complaints are not issues.
I didn't know that 0 has an inverse, which is -0. What a stupid kata.
Tests have a problem. They do not detect an error when there is a resistor value like "4.7M ohms". My code answered a wrong value and still passed the tests.