如何找出红宝石

说每场比赛的起点，我有以下字符串如何找出红宝石

string = "#Sachin is Indian cricketer. #Tendulkar is right hand batsman. #Sachin has been honoured with the Padma Vibhushan award "

我想O/P为

"#Sachin|0|7;#Tendulkar|29|10;#Sachinn|63|7;"

我尝试以下

new_string = "" 
string.scan(/#\S+/).each{|match| new_string+="#{match}|#{string.index(match)}|#{match.length};" }

哪给了我

"#Sachin|0|7;#Tendulkar|29|10;#Sachin|0|7;"

那么我将如何得到每个子串的起始索引？

来源

2013-06-19 Salil

这实际上是相当不平凡的任务，并且在其他关于SO的问题上已经讨论了很多。这是最常见的解决方案：

string = "#Sachin is Indian cricketer. #Tendulkar is right hand batsman. #Sachin has been honoured with the Padma Vibhushan award " 
new_string = string.to_enum(:scan,/#\S+/i).inject(''){|s,m| s + "#{m}|#{$`.size}|#{m.length};"}

来源

2013-06-19 08:45:17

+1并删除了我的答案:)你可以通过注入string.to_enum（：scan，/＃\ S +/i）.inject（''）{| s，m | s +“＃{m} |＃{$'.size} |＃{m.length};” } – trushkevich

不知道它有助于阅读，但无论如何它是相当难以辨认，所以我已经更新:)。谢谢。 –

在此基础上螺纹How do I get the match data for all occurrences of a Ruby regular expression in a string?只是简单的例子：

string = "#Sachin is Indian cricketer. #Tendulkar is right hand batsman. #Sachin has been honoured with the Padma Vibhushan award " 
new_string = "" 
string 
    .to_enum(:scan, /#\S+/) 
    .each do |wrd| 
    m = Regexp.last_match 
    new_string += "#{wrd}|#{m.offset(0)[0]}|#{wrd.length};" 
    end 
p new_string

来源

2013-06-19 08:46:23

下面是一个使用扫描：

offset = 0 
string.scan(/(#\S*)([^#]*)/).map{|m| v = "#{m[0]}|#{offset}|#{m[0].length};"; offset += m.join.length; v}.join 
#=> "#Sachin|0|7;#Tendulkar|29|10;#Sachin|63|7;"

来源

2013-06-19 08:51:49 pguardiario

如何找出红宝石

回答

相关问题