# Is there a simple way if a DataFrame (say empty as in just allocated) supports DataArray or NullableArray?
**URL:** https://discourse.julialang.org/t/is-there-a-simple-way-if-a-dataframe-say-empty-as-in-just-allocated-supports-dataarray-or-nullablearray/1605
**Category:** General Usage
**Created:** [January 20, 2017, 4:06am UTC](https://discourse.julialang.org/t/is-there-a-simple-way-if-a-dataframe-say-empty-as-in-just-allocated-supports-dataarray-or-nullablearray/1605 "2017-01-20T04:06:33Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@mwsohn](https://discourse.julialang.org/u/mwsohn)
#### Post date: [January 20, 2017, 4:06am UTC](https://discourse.julialang.org/t/is-there-a-simple-way-if-a-dataframe-say-empty-as-in-just-allocated-supports-dataarray-or-nullablearray/1605/1 "2017-01-20T04:06:33Z")
The title says it all.
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### Author:  [@johnmyleswhite](https://discourse.julialang.org/u/johnmyleswhite)
#### Post date: [January 20, 2017, 5:42am UTC](https://discourse.julialang.org/t/is-there-a-simple-way-if-a-dataframe-say-empty-as-in-just-allocated-supports-dataarray-or-nullablearray/1605/2 "2017-01-20T05:42:33Z")
What does the title mean?
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### Author:  [@mwsohn](https://discourse.julialang.org/u/mwsohn)
#### Post date: [January 20, 2017, 2:40pm UTC](https://discourse.julialang.org/t/is-there-a-simple-way-if-a-dataframe-say-empty-as-in-just-allocated-supports-dataarray-or-nullablearray/1605/3 "2017-01-20T14:40:57Z")
using DataFrames
df = DataFrame()
At this point, is there a way of finding out whether the DataFrame supports DataArray or NullableArray?