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author | Joris | 2017-03-26 21:10:42 +0200 |
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committer | Joris | 2017-03-26 21:10:42 +0200 |
commit | 1e47a7754ca38bd1a6c74765d8378caf68ce4619 (patch) | |
tree | d0d9238479dc2529a1b558bbbcde346e7e8c2935 /src/client/Utils/List.elm | |
parent | c0ac16a713c4e53cf6af8e72a6d5f6b8ac5d6456 (diff) | |
download | budget-1e47a7754ca38bd1a6c74765d8378caf68ce4619.tar.gz budget-1e47a7754ca38bd1a6c74765d8378caf68ce4619.tar.bz2 budget-1e47a7754ca38bd1a6c74765d8378caf68ce4619.zip |
Separate client and server watch
Diffstat (limited to 'src/client/Utils/List.elm')
-rw-r--r-- | src/client/Utils/List.elm | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/client/Utils/List.elm b/src/client/Utils/List.elm new file mode 100644 index 0000000..cc57d9f --- /dev/null +++ b/src/client/Utils/List.elm @@ -0,0 +1,17 @@ +module Utils.List exposing + ( groupBy + , mean + ) + +import Dict + +groupBy : (a -> comparable) -> List a -> List (comparable, List a) +groupBy f xs = + let addItem item dict = + let groupItems = Dict.get (f item) dict |> Maybe.withDefault [] + in Dict.insert (f item) (item :: groupItems) dict + in List.foldr addItem Dict.empty xs + |> Dict.toList + +mean : List Int -> Int +mean xs = (List.sum xs) // (List.length xs) |