假设将跳过文件读入变量skip，将信息文件读入变量info_file。然后，

skip_arr = skip.split("\n").map(&:strip)
  #=> ["stackoverflow.com", "github.com", "www.sa-k.net", "yoursearch.me",
  #    "search1.speedbit.com", "duckfm.net", "search.clearch.org",
  #    "webcache.googleusercontent.com"]

.map(&:strip)（您可以将其视为.map { |s| s.strip }）使用String#strip删除skip.split("\n")生成的数组元素周围的任何空格。这可能不是必要的，但这是一种预防措施，不会造成伤害。

info_arr = info.split("\n")
  #=> ["http://search.clearch.org/?a=web&q=Viewcat_h...,
  #    "https://moodle.org/mod/forum/discuss.php?d=246409",
  #    "http://webcache.googleusercontent.com/search?q=cache:oqPwN7FtDWgJ",
  #    "http://www.aquariumist.com.ua/spr.php?id=7",
  #    "http://search.clearch.org/?a%3Dweb%26q%3DViewcat_h.php...,
  #    "http://www.astbury.leeds.ac.uk/research/spr.php",
  #    "http://www.media4play.li/s/spr+php+id.html",
  #    "http://v.virscan.org/SPR/PHP.ID.html",
  #    "http://search.clearch.org/?a=images&q=Viewcat_h.php%3Fidcategory%3D+",
  #    "http://search.clearch.org/?a=web&q=Inurl%20Viewcat_h.php...,
  #    "http://webcache.googleusercontent.com/search?q=cache:5qNE1JBqUeIJ",
  #    "http://search.clearch.org/?a%3Dweb%26q%3DInurl%2520Viewcat_h.php...]

接下来我们定义一个正则表达式。

r = / 
    (?<=\/\/)  # match two forward slashes in a positive lookbehind
    #{ Regexp.union(skip_arr) } # match any element of skip_arr
    (?=\/)     # match a forward slash in a positive lookahead
    /x         # free-spacing regex definition mode
#=> / 
    (?<=\/\/)  # match two forward slashes in a positive lookbehind
    (?-mix:stackoverflow\.com|github\.com|www\.sa\-k\.net|yoursearch\.me|
      search1\.speedbit\.com|duckfm\.net|search\.clearch\.org|
      webcache\.googleusercontent\.com) # match any element of skip_arr
    (?=\/)     # match a forward slash in a positive lookahead
    /x

最后，使用Array#reject方法删除info.arr中与这个“regex”匹配的元素：

info_arr.reject { |s| s =~ r }
  #=> ["https://moodle.org/mod/forum/discuss.php?d=246409",
  #    "http://www.aquariumist.com.ua/spr.php?id=7", 
  #    "http://www.astbury.leeds.ac.uk/research/spr.php",
  #    "http://www.media4play.li/s/spr+php+id.html",
  #    "http://v.virscan.org/SPR/PHP.ID.html"]