ruby csvファイル加工サンプル

csvEdit.rb

CSV.open("/Users/a_nishiyama/Kokodayo.com/ruby_examples/data/sample_new.csv", 'w') do |write|
  CSV.foreach("/Users/a_nishiyama/Kokodayo.com/ruby_examples/data/sample.csv") do |columns|
    # columns.each {|header, field| field += "test";p field }
    # columns.each { |head, field| columns[head] = "test" }
    columns.unshift("hoge") # 行の先頭に追加
    columns[1] = "置換" # 行の置き換え
    columns.push $. == 1 ? 'head' : 'hoge' # 行の先頭に追加
    write << columns

  end
end