Might be inefficient to create an array for large ranges, and only supports range of integers (no dates). Have you seen Ruby's Range class? ruby-doc.org/core-2.2.0/Range.html
You could still implement toArray() and offer a covers() function.
Yes! You are right! I will add a generator implementation as well which should solve this problem! ;D
I'd like to see the generator implementation!
What do you think about it? I have implemented.
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