Removing whitespaces in a CSV file

Question

I have a string with extra whitespace:

First,Last,Email  ,Mobile Phone ,Company,Title  ,Street,City,State,Zip,Country, Birthday,Gender ,Contact Type

Answer 1

@prices = CSV.parse(IO.read('prices.csv'), :headers=>true, 
   :header_converters=> lambda {|f| f.strip},
   :converters=> lambda {|f| f ? f.strip : nil})

The nil test is added to the row but not header converters assuming that the headers are never nil, while the data might be, and nil doesn't have a strip method. I'm really surprised that, AFAIK, :strip is not a pre-defined converter!