Concat & Conj

concat-and-con.clj

(concat [1 2 3] 4)
  => gives an error.  Remember, concat wants to squish together 2 differnt collections of data.

(conj [1 2 3] 4)
  => gives [1 2 3 4].  Sucessfully adds an item to a collection.  Added it to the end because the coll is a vector.
    



(concat [1 2 3] [4])
  => gives [1 2 3 4].  concat wants to squish togeter 2 different coll of data to form 1 coll of data.  

(conj [1 2 3] [4])
  => gives [1 2 3 [4]].  conj wants to add an item to a coll.  And the item you gave it was a vector.