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.!= ) :: Parser (Maybe a) -> a -> Parser ayaml Data.Yaml.TH Helper for use in combination with .:? to provide default values for optional JSON object fields. This combinator is most useful if the key and value can be absent from an object without affecting its validity and we know a default value to assign in that case. If the key and value are mandatory, use .: instead. Example usage:
v1 <- o .:? "opt_field_with_dfl" .!= "default_val" v2 <- o .: "mandatory_field" v3 <- o .:? "opt_field2"
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.: ) :: FromJSON a => Object -> Key -> Parser ayaml Data.Yaml.TH Retrieve the value associated with the given key of an Object. The result is empty if the key is not present or the value cannot be converted to the desired type. This accessor is appropriate if the key and value must be present in an object for it to be valid. If the key and value are optional, use .:? instead.
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.:? ) :: FromJSON a => Object -> Key -> Parser (Maybe a)yaml Data.Yaml.TH Retrieve the value associated with the given key of an Object. The result is Nothing if the key is not present or if its value is Null, or empty if the value cannot be converted to the desired type. This accessor is most useful if the key and value can be absent from an object without affecting its validity. If the key and value are mandatory, use .: instead.
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.= ) :: (KeyValue e kv, ToJSON v) => Key -> v -> kvyaml Data.Yaml.TH No documentation available.
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.= ) :: String -> Json -> (String, Json)Cabal Distribution.Utils.Json A shorthand for building up JsonObjects >>> JsonObject [ "a" .= JsonNumber 42, "b" .= JsonBool True ] JsonObject [("a",JsonNumber 42),("b",JsonBool True)]
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.! ) :: JStgExpr -> JStgExpr -> JStgExprghc GHC.JS.Make return the expression at idx of obj
obj .! idx ==> obj[idx]
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.!=. ) :: JStgExpr -> JStgExpr -> JStgExprghc GHC.JS.Make JS infix Equality operators
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.!==. ) :: JStgExpr -> JStgExpr -> JStgExprghc GHC.JS.Make JS infix Equality operators
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.&&. ) :: JStgExpr -> JStgExpr -> JStgExprghc GHC.JS.Make JS infix bit operators
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.<. ) :: JStgExpr -> JStgExpr -> JStgExprghc GHC.JS.Make JS infix Ord operators