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Add dictionary get with validation.
[hope.git]
/
src
/
hope_kv_list.erl
diff --git
a/src/hope_kv_list.erl
b/src/hope_kv_list.erl
index
7b25797
..
cb1c4a4
100644
(file)
--- a/
src/hope_kv_list.erl
+++ b/
src/hope_kv_list.erl
@@
-13,8
+13,9
@@
-export(
[ empty/0
-export(
[ empty/0
- , get/2
- , get/3
+ , get/2 % get option
+ , get/3 % get existing or default
+ , get/4 % get existing if valid, or default
, set/3
, update/3
, pop/2
, set/3
, update/3
, pop/2
@@
-75,6
+76,13
@@
get(T, K, Default) ->
Vopt = get(T, K),
hope_option:get(Vopt, Default).
Vopt = get(T, K),
hope_option:get(Vopt, Default).
+-spec get(t(K, V), K, V, fun((V) -> boolean())) ->
+ V.
+get(T, K, Default, IsValid) ->
+ VOpt1 = get(T, K),
+ VOpt2 = hope_option:validate(VOpt1, IsValid),
+ hope_option:get(VOpt2, Default).
+
-spec set(t(K, V), K, V) ->
t(K, V).
set(T, K, V) ->
-spec set(t(K, V), K, V) ->
t(K, V).
set(T, K, V) ->
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