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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.
Ah, very good
Why invalidated?
I think we do. modifying the input is bad practice and the input might not even support that remove operation. Like all List of implementations.
Times out for me
Yes, that isn't defined, unfortunately
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It is. Description says: Assume the second parameter will be a string holding one of two values: 'value' and 'index'.
So we don't have to consider other cases. That behaviour is undefined, we can return whatever.
It doesn't, because the input string is thread safe and we don't use member variables.
Why do you always use Interfaces instead of classes?
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Nice idea. I modified it a bit.
The last step could be simplified by leftShoes.equals(rightShoes)
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This comment is hidden because it contains spoiler information about the solution
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