Concatenate two dataframes with same columns

[Nicinic]

Hi, I'm using Joinery on a project to compute statistics inside a simulator. I'm looking for the best way to concatenate two dataframes that have the same columns (since they were extracted from the same main dataframe). However, I haven't found a way to do this with joinery, and I kindadoubt that adding each row of the second dataframe to the first is a good solution to this problem. Is there a method to concatenate two dataframes, similar to the method "concat" in pandas ?

If i use join with the Outer JoinType, each column gets dupliacted into right and left ones which isn't the result I want.

Thank you

[cardillo]

Does append give the desired result?

[Nicinic]

Yes it is possible to iterate over the second dataframe and append each row to the first dataframe to obtain the desired result DataFrame<Object> df = ... ; DataFrame<Object> df2 = ...; for(List<Object> row : df2) { df.append(row); }

But is it really the optimal way to do it ?

[cardillo]

Agree, not ideal, but should get you going today. I'll look at adding a more efficient concat implementation to next release.

[Nicinic]

Thanks. I will use this solution until the new version comes out. And thanks a lot for this library

[jihoonkang0829]

Hi, I would like to contribute. Can you assign it to me? If not, I will start working on it!

[cardillo]

Thanks @jihoonkang0829, please submit a PR when you're ready.

[pkatre2]

can you assign it to me , would like to contribute

[donggua223344]

Can you assign it to me? I would like to contribute