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Diffstat (limited to 'lib/stdlib/src/dict.erl')
| -rw-r--r-- | lib/stdlib/src/dict.erl | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/lib/stdlib/src/dict.erl b/lib/stdlib/src/dict.erl index 32a7878da4..7e198a2469 100644 --- a/lib/stdlib/src/dict.erl +++ b/lib/stdlib/src/dict.erl @@ -36,7 +36,7 @@ -module(dict). %% Standard interface. --export([new/0,is_key/2,to_list/1,from_list/1,size/1]). +-export([new/0,is_key/2,to_list/1,from_list/1,size/1,is_empty/1]). -export([fetch/2,find/2,fetch_keys/1,erase/2]). -export([store/3,append/3,append_list/3,update/3,update/4,update_counter/3]). -export([fold/3,map/2,filter/2,merge/3]). @@ -112,6 +112,11 @@ from_list(L) -> size(#dict{size=N}) when is_integer(N), N >= 0 -> N. +-spec is_empty(Dict) -> boolean() when + Dict :: dict(). + +is_empty(#dict{size=N}) -> N =:= 0. + -spec fetch(Key, Dict) -> Value when Key :: term(), Dict :: dict(), |