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Ingy döt Net 2023-07-01 11:58:00 -04:00
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Task/CSV-data-manipulation/Ruby/csv-data-manipulation.rb Normal file
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require 'csv'
# read:
ar = CSV.table("test.csv").to_a #table method assumes headers and converts numbers if possible.
# manipulate:
ar.first << "SUM"
ar[1..-1].each{|row| row << row.sum}
# write:
CSV.open("out.csv", 'w') do |csv|
ar.each{|line| csv << line}
end