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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.
Please use spoiler flag next time.
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Input string without integers or an empty string would return a format exception.
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It works like "where" clause. For example: list.FirstOrDefault(x => x>5)
Any chance you can explain how that lambda function passed in as an arg to FirstOrDefault works? I didn't think firstordefault took any args.
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What would be if input paramether s is null or empty?
Replace Boolean with bool