header_convert(name = nil, &converter)
public
Identical to CSV#convert(), but for header rows.
Note that this method must be called before header rows are read to have any effect.
# File lib/csv.rb, line 1744
def header_convert(name = nil, &converter)
add_converter( :@header_converters,
self.class::HeaderConverters,
name,
&converter )
end