diff options
Diffstat (limited to 'gen/src/map_dict.erl')
| -rw-r--r-- | gen/src/map_dict.erl | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/gen/src/map_dict.erl b/gen/src/map_dict.erl index 10150b3..e72b92d 100644 --- a/gen/src/map_dict.erl +++ b/gen/src/map_dict.erl @@ -1,7 +1,7 @@ -module(map_dict). -compile(no_auto_import). --export([size/1, to_list/1, from_list/1, has_key/2, new/0, fetch/2, put/3, map_values/2, keys/1, values/1, filter/2, take/2, merge/2, delete/2, drop/2, update/3]). +-export([size/1, to_list/1, from_list/1, has_key/2, new/0, fetch/2, put/3, map_values/2, keys/1, values/1, filter/2, take/2, merge/2, delete/2, drop/2, update/3, fold/3]). size(A) -> maps:size(A). @@ -74,3 +74,13 @@ update(Dict, Key, F) -> {error, _} -> put(Dict, Key, F({error, not_found})) end. + +fold(Dict, Acc, F) -> + Kvs = to_list(Dict), + case Kvs of + [] -> + Acc; + + [{K, V} | _] -> + fold(delete(Dict, K), F(K, V, Acc), F) + end. |