diff options
Diffstat (limited to 'stdlib/source/lux/data/coll/dict.lux')
| -rw-r--r-- | stdlib/source/lux/data/coll/dict.lux | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/stdlib/source/lux/data/coll/dict.lux b/stdlib/source/lux/data/coll/dict.lux index e00cbb17f..1091100b6 100644 --- a/stdlib/source/lux/data/coll/dict.lux +++ b/stdlib/source/lux/data/coll/dict.lux @@ -2,7 +2,7 @@ lux (lux (control hash [eq #+ Eq]) - (data maybe + (data [maybe] (coll [list "list/" Fold<List> Functor<List> Monoid<List>] [array "array/" Functor<Array> Fold<Array>]) [bit] @@ -212,7 +212,7 @@ ## Produces the index of a KV-pair within a #Collisions node. (def: (collision-index Hash<k> key colls) (All [k v] (-> (Hash k) k (Collisions k v) (Maybe Index))) - (:: Monad<Maybe> map product.left + (:: maybe.Monad<Maybe> map product.left (array.find+ (function [idx [key' val']] (:: Hash<k> = key key')) colls))) @@ -493,7 +493,7 @@ ## For #Collisions nodes, do a linear scan of all the known KV-pairs. (#Collisions _hash _colls) - (:: Monad<Maybe> map product.right + (:: maybe.Monad<Maybe> map product.right (array.find (|>> product.left (:: Hash<k> = key)) _colls)) )) @@ -588,6 +588,14 @@ (#.Some val) (put key (f val) dict))) +(def: #export (update~ key default f dict) + {#.doc "Transforms the value located at key (if available), using the given function."} + (All [k v] (-> k v (-> v v) (Dict k v) (Dict k v))) + (put key + (f (maybe.default default + (get key dict))) + dict)) + (def: #export size (All [k v] (-> (Dict k v) Nat)) (|>> product.right size')) |