Rubyã§ã€Œãƒ©ãƒ³ãƒ€ãƒ ã«æ—¥ä»˜å–å¾—ã€1万件ã®ãƒ†ã‚¹ãƒˆãƒ‡ãƒ¼ã‚¿ã‚’作æˆã™ã‚‹ã¨ã〠登録日をランダム作æˆã™ã‚‹å¿…è¦ãŒã‚り〠ã“ã‚“ãªæ„Ÿã˜ã§ä½œã£ã¦ã¿ã¾ã—ãŸã€‚ ◇期間を指定ã—ã¦ã€ãƒ©ãƒ³ãƒ€ãƒ ã«æ—¥ä»˜ã‚’生æˆã™ã‚‹ã€‚ ソース require 'date' def rand_date(d_from,d_to) from = Date.parse(d_from) to = Date.parse(d_to) days = to - from + 1 return from + rand(days) end 5.times{ puts rand_date("1978-09-30","1980-10-10") } 実行çµæžœ 1979-08-02 1979-08-13 1980-05-03 1979-02-06 1979-01-30 [å‚考] http://d.hatena.ne.jp/rubyco/20070704/date
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