he/him 
when order is important, when duplicate entries are legit. Basically an array is a structure, a set isn't.
Been using a lot of ES2015 Sets and struggling to decide when to use an array or a collection.
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order matters in sets, i find myself relying on the unique ordering
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New conversation -
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when you need duplicate entries in you list, or ability to insert at a node... Or subsets... Lotsa fun reasons.
Thanks. Twitter will use this to make your timeline better. UndoUndo
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