ruby - 在 Ruby 中扫描字符串数组以查找匹配项

Question

我有一个字符串数组，我想在数组中的每个字符串中搜索特定的单词(猫或狗)，并能够按照它们出现的顺序查看结果。

例句

Strings[0] = "Subject family leans toward cats" 
Strings[1] = "Test subject prefers dogs"

我试过 String.each {|x| x.scan(/cat|dog)/} 但我只会得到结果中的最后一场比赛。我怎样才能正确地执行此操作以获得 puts $1 => cat puts $2 => dog？谢谢你的帮助

Answer 1

strings = [ "Subject family leans toward cats",
            "Test subject prefers dogs" ]
cat_and_dogs = strings.join.scan /cat|dog/
#=> ["cat", "dog"]

所以现在你可以放置它:

puts cats_and_dogs[0]
#=> "cat"
puts cats_and_dogs[1]
#=> "dog"
puts cats_and_dogs.join(" & ")
#=> "cat & dog"