如何找出紅寶石

說每場比賽的起點，我有以下字符串如何找出紅寶石

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

我想O/P爲

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

我嘗試以下

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

哪給了我

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

那麼我將如何得到每個子串的起始索引？

來源

2013-06-19 Salil

這實際上是相當不平凡的任務，並且在其他關於SO的問題上已經討論了很多。這是最常見的解決方案：

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};"}

來源

2013-06-19 08:45:17

+1並刪除了我的答案:)你可以通過注入string.to_enum（：scan，/＃\ S +/i）.inject（''）{| s，m | s +「＃{m} |＃{$'.size} |＃{m.length};」 } – trushkevich

不知道它有助於閱讀，但無論如何它是相當難以辨認，所以我已經更新:)。謝謝。 –

在此基礎上螺紋How do I get the match data for all occurrences of a Ruby regular expression in a string?只是簡單的例子：

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

來源

2013-06-19 08:46:23

下面是一個使用掃描：

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;"

來源

2013-06-19 08:51:49 pguardiario

如何找出紅寶石

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