user=> (conj [1 2 3] 4)
[1 2 3 4]
user=> (conj '(1 2 3) 4)
(4 1 2 3)
user=> (conj ["a" "b" "c"] "d")
["a" "b" "c" "d"]
user=> (conj [1 2] 3 4)
[1 2 3 4]
user=> (conj [[1 2] [3 4]] [5 6])
[[1 2] [3 4] [5 6]]
;; Maps only take vectors of length exactly 2
user=> (conj {1 2, 3 4} [5 6])
{5 6, 1 2, 3 4}
user=> (conj {:firstname "John" :lastname "Doe"} {:age 25 :nationality "Chinese"})
{:nationality "Chinese", :age 25, :firstname "John", :lastname "Doe"}
;; conj on a set
user=> (conj #{1 3 4} 2)
#{1 2 3 4}
user=> (conj [1 2 3] 4)
[1 2 3 4]
user=> (conj '(1 2 3) 4)
(4 1 2 3)
user=> (conj ["a" "b" "c"] "d")
["a" "b" "c" "d"]
user=> (conj [1 2] 3 4)
[1 2 3 4]
user=> (conj [[1 2] [3 4]] [5 6])
[[1 2] [3 4] [5 6]]
;; Maps only take vectors of length exactly 2
user=> (conj {1 2, 3 4} [5 6])
{5 6, 1 2, 3 4}
user=> (conj {:firstname "John" :lastname "Doe"} {:age 25 :nationality "Chinese"})
{:nationality "Chinese", :age 25, :firstname "John", :lastname "Doe"}
;; conj on a set
user=> (conj #{1 3 4} 2)
#{1 2 3 4}
