Hello,
My guess:
If you dont pass in a pointer, then you pass a value.
What would be the point of updating the value that you will never see and
that will get discarded?
Hence it returns a map that provides the unmarshaled values so at least you
have something to work with.
Le mardi 2 mai 2017 20:59:52 UTC+2, Brian Stengaard a écrit :
>
> Hey Gophers,
>
> When unmarshalling JSON into a struct with a blank interface (interface{})
> I get a surprising result:
>
> If I set the field to a pointer to a T value before unmarshalling, the
> data is filled out on the T value as expected. (See I2 in the playground
> example.)
>
> If I set the field to a T value before unmarshalling, field will be set to
> a map[string]interface{} when returning, I was expecting a T value.
>
> Since the field is not nil I would expect json.Unmarshal to just fill in
> the fields on the data structure provided, not override the field value.
>
> What am I missing?
>
> Example: https://play.golang.org/p/O-55nj0h44 why is I1 a
> map[string]interface{} when I already gave it a T value?
>
>
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