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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.
This seems to be a question, not an issue.
Please before posting an issue look at the top of the page to see how many people passed the kata in your language (1975 for JS - I suppose Js is your language...). When the number is big enough chances are there is a problem in your code then post a question, not an issue, to see if somebody has time to look at your code.
The first test you failed is
gap(11,30000,100000)in fixed tests; this test is common to all languages (passed by 8217 people -see top of the page) so I am afraid there are some flaws in your code.Cheers.
Doing it like that, you only add those properties to that particular array, you have to work with the class instead.
And how did you extend it? We can't guess it. Post your code and mark your post as having spoiler content.