我是
Ruby的新手,我想对字符串进行排序,但保留非字母数字字符.
例如:“你好,莎莉!见过10 / dec / 2016”=> “ehllo,allsy!eens 01 / cde / 0126”
例如:“你好,莎莉!见过10 / dec / 2016”=> “ehllo,allsy!eens 01 / cde / 0126”
我试过做:
word.scan(/\w+/).collect { |e| ((e.scan /\w/).sort.join)} #=> ["ehllo","allsy","eens","01","cde","0126"]
但我无法弄清楚如何将非字母数字字符放回去.
解决方法
But I can’t figure out how to put the non alphanumeric characters back.
首先不要删除它们会更容易:
str = "hello,sally! seen 10/dec/2016" str.gsub(/\w+/) { |m| m.chars.sort.join } #=> "ehllo,allsy! eens 01/cde/0126"
gsub
扫描字符串中的给定模式并将每个匹配字符串传递给块,因此使用“hello”,“sally”,“seen”,“10”,“dec”和“2016”调用该块.它通过以下方式排序字符串:
m = "hello" m.chars #=> ["h","e","l","o"] .sort #=> ["e","h","o"] .join #=> "ehllo"
然后gsub将块的结果替换为匹配.