sfc-gh-pfus commented on issue #41284:
URL: https://github.com/apache/arrow/issues/41284#issuecomment-2067130331
That worked:
```
structArr, err :=
array.NewStructArray([]arrow.Array{keyCol, valueCol}, []string{"k", "v"})
if err != nil {
return nil, err
}
defer structArr.Release()
newData := array.NewData(arrow.MapOf(keyCol.DataType(),
valueCol.DataType()), mapCol.Len(), mapCol.Data().Buffers(),
[]arrow.ArrayData{structArr.Data()}, mapCol.NullN(), 0)
defer newData.Release()
return array.NewMapData(newData), nil
```
Thanks a lot! It would be nice to have some helper functions though :)
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