From 1e47a7754ca38bd1a6c74765d8378caf68ce4619 Mon Sep 17 00:00:00 2001
From: Joris
Date: Sun, 26 Mar 2017 21:10:42 +0200
Subject: Separate client and server watch

---
 src/client/Utils/Maybe.elm | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 src/client/Utils/Maybe.elm

(limited to 'src/client/Utils/Maybe.elm')

diff --git a/src/client/Utils/Maybe.elm b/src/client/Utils/Maybe.elm
new file mode 100644
index 0000000..46456e1
--- /dev/null
+++ b/src/client/Utils/Maybe.elm
@@ -0,0 +1,34 @@
+module Utils.Maybe exposing
+  ( isJust
+  , cat
+  , toList
+  , orElse
+  )
+
+isJust : Maybe a -> Bool
+isJust maybe =
+  case maybe of
+    Just _  -> True
+    Nothing -> False
+
+cat : List (Maybe a) -> List a
+cat =
+  List.foldr
+    (\mb xs ->
+      case mb of
+        Just x  -> x :: xs
+        Nothing -> xs
+    )
+    []
+
+toList : Maybe a -> List a
+toList mb =
+  case mb of
+    Just a  -> [a]
+    Nothing -> []
+
+orElse : Maybe a -> Maybe a -> Maybe a
+orElse mb1 mb2 =
+  case mb1 of
+    Just x -> Just x
+    Nothing -> mb2
-- 
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