Github user felixcheung commented on the pull request:
https://github.com/apache/spark/pull/8961#issuecomment-145166133
Updated:
```
> head(select(df,c("name", "age"), "abc"))
Error in head(select(df, c("name", "age"), "abc")) :
error in evaluating the argument 'x' in selecting a method for function
'head': Error in select(df, c("name", "age"), "abc") :
To select multiple columns, use a character vector or list for col
> head(select(df,c("name", "age"), "abc", "bc"))
Error in head(select(df, c("name", "age"), "abc", "bc")) :
error in evaluating the argument 'x' in selecting a method for function
'head': Error in select(df, c("name", "age"), "abc", "bc") :
To select multiple columns, use a character vector or list for col
> head(select(df,c("name", "age"), c("abc", "bc")))
Error in head(select(df, c("name", "age"), c("abc", "bc"))) :
error in evaluating the argument 'x' in selecting a method for function
'head': Error in select(df, c("name", "age"), c("abc", "bc")) :
To select multiple columns, use a character vector or list for col
```
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