21/04/26 13:52:06.70 0DE0v1OZ0.net
require 'csv'
result_ary = [ ]
CSV.foreach( "input.csv" ) do |row| # 1行ずつ処理する
split_ary = split_string( row[ 1 ] )
split_ary.each do |url|
result_ary.push [ row[ 0 ], url ]
end
end
# 2次元配列を、CSV 文字列に変換する
csv_str = result_ary.map( &:to_csv ).join
print csv_str