lazy-map.core
Create lazy-maps, whose values are only calculated when they are looked up for the first time, see lazy-map
->LazyMap
(->LazyMap contents)
Positional factory function for class lazy_map.core.LazyMap.
lazy-map
macro
(lazy-map m)
Return a LazyMap created from a map m
. The values in m
are only evaluated when accessed.
user> (def my-map
(lazy-map
{:cause (do (println "Getting Cause")
:major-failure)
:name (do (println "Getting Name")
"Some Name")}))
#'user/my-map
user> (:name my-map)
Getting Name
"Some Name"
user> (:name my-map)
"Some Name"