robertluo.fun-map
fun-map Api
fun-map Api
closeableclj
(closeable r close-fn)Returns a wrapped plain value, which implements IDref and Closeable, the close-fn is an effectual function with no argument.
When used inside a life cycle map, its close-fn when get called when closing the map.
Returns a wrapped plain value, which implements IDref and Closeable, the close-fn is an effectual function with no argument. When used inside a life cycle map, its close-fn when get called when closing the map.
fnkcljmacro
(fnk args & body)A shortcut for fw macro. Returns a simple FunctionWrapper which depends on
args key of the fun-map, it will focus on the keys also.
A shortcut for `fw` macro. Returns a simple FunctionWrapper which depends on `args` key of the fun-map, it will *focus* on the keys also.
fun-mapclj
(fun-map m & {:keys [trace-fn]})Returns a new fun-map.
A fun-map is a special map which will automatically unwrap a value if it's a wrapper when accessed by key. A wrapper is anything which wrapped a ordinary value inside. Many clojure data structures are wrapper, such as atom, ref, future, delay, agent etc. In fact, anything implements clojure.lang.IDRef interface is a wrapper.
FuntionWrapper is another wrapper can be used in a fun-map, which wraps a function, it will be called with the fun-map itself as the argument.
Map m is the underlying storage of a fun-map, fun-map does not change its property except accessing values.
Options:
- :trace-fn An Effectful function for globally FunctionWrapper calling trace which accept key and value as its argument.
Example:
(fun-map {:a 35 :b (delay (println "hello from b!"))}
Returns a new fun-map.
A fun-map is a special map which will automatically *unwrap* a value if it's a
wrapper when accessed by key. A wrapper is anything which wrapped a ordinary value
inside. Many clojure data structures are wrapper, such as atom, ref, future, delay,
agent etc. In fact, anything implements clojure.lang.IDRef interface is a wrapper.
FuntionWrapper is another wrapper can be used in a fun-map, which wraps a function,
it will be called with the fun-map itself as the argument.
Map m is the underlying storage of a fun-map, fun-map does not change its property
except accessing values.
Options:
- :trace-fn An Effectful function for globally FunctionWrapper calling trace which
accept key and value as its argument.
Example:
(fun-map {:a 35 :b (delay (println "hello from b!"))}fwcljmacro
(fw arg-map & body)Returns a FunctionWrapper of an anonymous function defined by body.
Since a FunctionWrapper's function will be called with the map itself as the
argument, this macro using a map arg-map as its argument. It follows the
same syntax of clojure's associative destructure. You may use :keys, :as,
:or inside.
Two special keys available though:
- :focus A form that will be called to check if the function itself need to be called. It must be pure functional and very effecient.
- :trace A trace function, if the value updated, it will be called with key and the function's return value.
Example:
(fw {:keys [a b] :as m :trace (fn [k v] (println k v)) :focus (select-keys m [:a :b])} (+ a b))
Returns a FunctionWrapper of an anonymous function defined by body.
Since a FunctionWrapper's function will be called with the map itself as the
argument, this macro using a map `arg-map` as its argument. It follows the
same syntax of clojure's associative destructure. You may use `:keys`, `:as`,
`:or` inside.
Two special keys available though:
- :focus A form that will be called to check if the function itself need
to be called. It must be pure functional and very effecient.
- :trace A trace function, if the value updated, it will be called with key
and the function's return value.
Example:
(fw {:keys [a b]
:as m
:trace (fn [k v] (println k v))
:focus (select-keys m [:a :b])}
(+ a b))Haltablecljprotocol
Life cycle protocol, signature just like java.io.Closeable, being a protocol gives user ability to extend
Life cycle protocol, signature just like java.io.Closeable, being a protocol gives user ability to extend
halt!clj
(halt! this)life-cycle-mapclj
(life-cycle-map m)returns a fun-map can be shutdown orderly.
Any FunctionWrapper supports Closeable in this map will be considered
as a component, its close method will be called in reversed order of its
creation when the map itself closing.
Notice only accessed components will be shutdown.
returns a fun-map can be shutdown orderly. Any FunctionWrapper supports `Closeable` in this map will be considered as a component, its `close` method will be called in reversed order of its creation when the map itself closing. Notice only accessed components will be shutdown.
touchclj
(touch m)Forcefully evaluate all entries of a map and returns itself.
Forcefully evaluate all entries of a map and returns itself.
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