[GitHub] [arrow-nanoarrow] lidavidm commented on issue #8: Implement `struct ArrowArrayBuilder`

[GitBox <gi...@apache.org>]

lidavidm commented on issue #8:
URL: https://github.com/apache/arrow-nanoarrow/issues/8#issuecomment-1195959994

   Looks reasonable to me. We may eventually want more conveniences, e.g. being able to append a range of values from a `int64_t*`, but this would work to start with. Also a `reserve` function may be useful (C++ has both `reserve` and `reserve_data` to deal with string/binary columns).
   
   What would the API look like for lists, structs, and unions? I suppose you could emulate a list builder by pretending you're building an int32 array, a struct builder really is only a bitmap builder, and a union builder is a int8 builder where you never append nulls.


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