#156

Map Defaults

 

When retrieving values from a map, you can specify default values in case the key is not found: (= 2 (:foo {:bar 0, :baz 1} 2)) However, what if you want the map itself to contain the default values? Write a function which takes a default value and a sequence of keys and constructs a map.

	(= (__ 0 [:a :b :c]) {:a 0 :b 0 :c 0})
	(= (__ "x" [1 2 3]) {1 "x" 2 "x" 3 "x"})
	(= (__ [:a :b] [:foo :bar]) {:foo [:a :b] :bar [:a :b]})