"ghc --make Odhug.hs" encounter errors #39
Description
hi.
root@AR:/usr/local/odhug.github.com/source# ghc --make Odhug.hs
[1 of 1] Compiling Main ( Odhug.hs, Odhug.o )
Odhug.hs:136:46: error:
• Couldn't match type ‘unordered-containers-0.2.7.1:Data.HashMap.Base.HashMap
Data.Text.Internal.Text
aeson-0.11.2.1:Data.Aeson.Types.Internal.Value’
with ‘Map.Map [Char] [Char]’
Expected type: Map.Map [Char] [Char]
Actual type: Metadata
• In the second argument of ‘Map.lookup’, namely ‘metadata’
In the expression: Map.lookup "title" metadata
In the expression:
case Map.lookup "title" metadata of {
Just value -> "OdHUG - " ++ value
Nothing -> [] }
Odhug.hs:158:12: error:
Variable not in scope: replace :: [Char] -> [Char] -> [Char] -> b
Odhug.hs:159:13: error:
Variable not in scope:
replace :: [Char] -> [Char] -> String -> [Char]
Odhug.hs:165:52: error:
• Couldn't match type ‘unordered-containers-0.2.7.1:Data.HashMap.Base.HashMap
Data.Text.Internal.Text
aeson-0.11.2.1:Data.Aeson.Types.Internal.Value’
with ‘Map.Map [Char] String’
Expected type: Map.Map [Char] String
Actual type: Metadata
• In the second argument of ‘Map.lookup’, namely ‘mdata’
In the second argument of ‘($)’, namely
‘Map.lookup "eventDate" mdata’
In a stmt of a 'do' block:
dateStr <- hoistMaybe $ Map.lookup "eventDate" mdata
Odhug.hs:183:3: error:
• Variable not in scope: encode :: [b0] -> String
• Perhaps you meant ‘decode’ (imported from Data.String.UTF8)
Odhug.hs:184:5: error:
Variable not in scope: toJSObject :: [([Char], String)] -> b0
root@AR:/usr/local/odhug.github.com/source#
how to fix them?