#clojure #language #programming #datastructure
- You can be more concise and readable code. For example:
(def my-line [[5 10] [10 20]])
(let [[p1 p2] my-line
[x1 y1] p1
[x2 y2] p2]
(println "Line from (" x1 "," y1 ") to (" x2 ", " y2 ")"))
;= "Line from ( 5 , 10 ) to ( 10 , 20 )"- Large list is a list with 10 elements however, we only get the first three:
(def large-list '(1 2 3 4 5 6 7 8 9 10))
(let [[a b c] large-list]
(println a b c))
;= 1 2 3- What happens with the remaining ones? If we want to capture them:
(def large-list '(1 2 3 4 5 6 7 8 9 10))
(let [[a b c & remaining] large-list]
(println a b c))
(apply println remaining)
;= 1 2 3
;= (4 5 6 7 8 9 10)- There is Associative Destructuring for maps.
- Usually destructuring is passed used for arguments in a function:
(defn print-coordinates-1 [point]
(let [x (first point)
y (second point)
z (last point)]
(println "x:" x ", y:" y ", z:" z)))
; or
(defn print-coordinates-2 [point]
(let [[x y z] point]
(println "x:" x ", y:" y ", z:" z)))