To clarify Baishampayan's code, hash-sets in Clojure are functions:
=> (#{1} 1)
1
=> (#{1} 2)
nil
Nil and false in Clojure are the same thing,
So Baishampayan's example:
(remove #{:a :z :x} [:a :b :a :c :d :e :z :b :d :e :x :z])
#{:a :z : x} will return nil if the value is not in the vector, nil is
considered false, and so the not found value is removed from the seq.
Timothy
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