Take attributes with names specified by atrs
from object lst and adds their value into columns with the same
name in df.
util_attributes_to_cols(lst, df, atrs = c("url", "copyright"))list, with attributes to be added as columns to df.
data.frame, onto which new columns containing attributes
of lst should be added.
character(), vector of names of attributes
of lst.
data.frame, df with added columns.