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jinjor/json-experiment.elm

Created May 20, 2018 09:00
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json-experiment.elm
json = """{ "name": "tom", "age": 42 }"""
decodeString (maybe (field "age" int )) json -- Ok (Just 42)
decodeString (maybe (field "name" int )) json -- Ok Nothing
decodeString (maybe (field "height" float)) json -- Ok Nothing
decodeString (maybe (field "height" float)) "null" -- Ok Nothing
decodeString (maybe (field "height" float)) "\"hello\"" -- Ok Nothing
decodeString (maybe (field "height" float)) "" -- Err ...
decodeString (field "age" (maybe int )) json -- Ok (Just 42)
decodeString (field "name" (maybe int )) json -- Ok Nothing
decodeString (field "height" (maybe float)) json -- Err ...
decodeString (field "height" (maybe float)) "null" -- Err ...
decodeString (field "height" (maybe float)) "\"hello\"" -- Err ...
decodeString (field "height" (maybe float)) "" -- Err ...
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