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| author | Björn-Egil Dahlberg <[email protected]> | 2014-01-27 16:00:34 +0100 |
|---|---|---|
| committer | Björn-Egil Dahlberg <[email protected]> | 2014-01-29 11:08:50 +0100 |
| commit | 335e6bf3e4987e5f549136c1f692c628b1dfc360 (patch) | |
| tree | 03391041ce3e27daec19806a72e08652079b2d82 /lib/stdlib | |
| parent | 543074e7aab966a597e405bc52c94e57358663a5 (diff) | |
| download | otp-335e6bf3e4987e5f549136c1f692c628b1dfc360.tar.gz otp-335e6bf3e4987e5f549136c1f692c628b1dfc360.tar.bz2 otp-335e6bf3e4987e5f549136c1f692c628b1dfc360.zip | |
stdlib: Make maps:fold/3 order-independent
This means replacing maps:foldl/3 and maps:foldr/3 with maps:fold/3.
Diffstat (limited to 'lib/stdlib')
| -rw-r--r-- | lib/stdlib/src/maps.erl | 21 |
1 files changed, 3 insertions, 18 deletions
diff --git a/lib/stdlib/src/maps.erl b/lib/stdlib/src/maps.erl index 0e6a1ddb1a..41de174e7d 100644 --- a/lib/stdlib/src/maps.erl +++ b/lib/stdlib/src/maps.erl @@ -20,8 +20,7 @@ -module(maps). -export([ - foldl/3, - foldr/3, + fold/3, map/2, size/1, without/2 @@ -154,7 +153,7 @@ values(_) -> erlang:nif_error(undef). %%% End of BIFs --spec foldl(Fun,Init,Map) -> Acc when +-spec fold(Fun,Init,Map) -> Acc when Fun :: fun((K, V, AccIn) -> AccOut), Init :: term(), Acc :: term(), @@ -164,23 +163,9 @@ values(_) -> erlang:nif_error(undef). K :: term(), V :: term(). -foldl(Fun, Init, Map) when is_function(Fun,3), is_map(Map) -> +fold(Fun, Init, Map) when is_function(Fun,3), is_map(Map) -> lists:foldl(fun({K,V},A) -> Fun(K,V,A) end,Init,maps:to_list(Map)). --spec foldr(Fun,Init,Map) -> Acc when - Fun :: fun((K,V,AccIn) -> AccOut), - Init :: term(), - Acc :: term(), - AccIn :: term(), - AccOut :: term(), - Map :: map(), - K :: term(), - V :: term(). - -foldr(Fun, Init, Map) when is_function(Fun,3), is_map(Map) -> - lists:foldr(fun({K,V},A) -> Fun(K,V,A) end,Init,maps:to_list(Map)). - - -spec map(Fun,Map1) -> Map2 when Fun :: fun((K, V1) -> V2), Map1 :: map(), |