Added getFieldOptional' to Decode.Combinators #1
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The regular getFieldOptional doesn't return Nothing when the value of the field is null. getFieldOptional' does give Nothing when the field is null. The operator aliasses are changed to mimic the Haskell Data.Aeson libraries implementation. (If, for legacy reasons, the alias for the old getFieldOptional shouldn't change, then switch (.??) for (.?!) and vice-versa.)
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The regular getFieldOptional doesn't return Nothing when the value of the field is null.
getFieldOptional' does give Nothing when the field is null.
The operator aliasses are changed to mimic the Haskell Data.Aeson libraries implementation.
(If, for legacy reasons, the alias for the old getFieldOptional shouldn't change, then switch (.??) for (.?!) and vice-versa.)