Rename columns in view

General Usage
,
3

Thanks. this seems to work for multiple columns as well.

I though that a view had to be a SubDataFrame.

Since select() returns a DataFrame I thought it was creating a new object.
Though I notice that changing the original does change the select() object

df = DataFrame(A=1:2,B=3:4)
x = select( df, :A => :a, :B => :b,  copycols=false)
df[1,:A] = 99
x

julia> x
2×2 DataFrame       
 Row │ a      b     
     │ Int64  Int64 
─────┼──────────────
   1 │    99      3 
   2 │     2      4