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thanks, after playing around with it I realized that a hashset can only add members and check if a member is inside the hashset. So it's limited but fast. I'm guessing you would convert it to an...

I've always been confused about hashtables/hashmaps. What are they?

I thought they may be like a 2 dimensional version of an arraylist which is like a 1 dimensional array. If not, what is it, or...