In Scala you can first define your columns, and then use the
list-to-vararg-expander :_* in a select call, something like this:
val cols = colnames.map(col).map(column => {
*lit(0)*
})
dF.select(cols: _*)
I assume something similar should be possible in Java as well, from
your snippet it's unclear which programming language you're actually
using.
On Thu, May 4, 2017 at 9:55 AM, issues solution
wrote:
> Hi ,
>
> How we can create multiple columns iteratively i mean how you can create
> empty columns inside loop because :
> with
> for i in listl :
> df = df.withcolumn(i,F.lit(0))
>
> we get stackoverflow
> how we can do that inside list of columns like that
>
> df.select([F.col(i).lit(0) for i in df.columns ])
>
> i know the last line it not correct but i try to show you what kind of
> result i expect .
>
> Thx for advance
> .
>
