刪除標點符號格式的文本 - 星火

Question

這是我的數據的一個樣本：

case time (especially it's purse), read manual care, follow care instructions make stays waterproof -- example, inspect rubber seals doors (especially battery/memory card door open time) 
xm "life support" picture . flip part bit flimsy guessing won't long . sound great altec speaker dock it! chance back base (xm3020) . traveling bag connect laptop extra speaker . amount paid ($25). 

我想刪除所有標點符號除了點，並與length < = 2刪除的話，比如我的預期輸出（）。是：

case time especially its purse read manual care follow care instructions . make stays waterproof example inspect rubber seals doors especially batterymemory card door open time 
life support picture . flip part bit flimsy guessing wont long . sound great altec speaker dock chance back base xm3020 . traveling bag connect laptop extra speaker . amount paid $25 . 

，這應該在Scala中實現， 我已經試過：

replaceAll("""\\W\s""", "") 
replaceAll(""""[^a-zA-Z\.]""", "") 

但無法正常工作，任何人都可以幫助我嗎？

Answer 1

望着正則表達式的javadoc（http://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html ），我們看到標點符號的字符類是\p{Punct}，我們可以刪除來自角色類的字符使用[a-z&&[^def]]。從那以後，很容易定義一個正則表達式，將刪除所有標點符號除了點：

s.replaceAll("""[\p{Punct}&&[^.]]""", "") 

刪除單詞，大小< = 2可以像這樣做：

s.replaceAll("""\b\p{IsLetter}{1,2}\b""") 

結合了兩下，這給出：

s.replaceAll("""([\p{Punct}&&[^.]]|\b\p{IsLetter}{1,2}\b)\s*""", "") 

請注意我如何添加\s*刪除冗餘空間。

此外，你可以看到上述正則表達式完全刪除'$'，因爲它是一個標點符號（由unicode定義）。 如果這是不可取的（似乎表明您的預期輸出），請更精確地考慮標點符號。 例如，你可能希望只考慮下列字符爲標點符號：?.!:()：

s.replaceAll("""([?.!:]|\b\p{IsLetter}{1,2}\b)\s*""", "") 

或者，你可以只添加「$」您「不標點」人物名單，以點一起：

s.replaceAll("""([\p{Punct}&&[^.$]]|\b\p{IsLetter}{1,2}\b)\s*""", "") 

Answer 2

如何：

replaceAll("(\\(|\\)|'|/", "") 

然後你只需要添加更多的標點符號使用刪除|，並確保逃避像字符（和）雙反斜線？

Answer 3

你可以嘗試過濾這樣的字符串：

val example = "Hey there! It's me, myself and I." 
example.filterNot(x => x == ',' || x == '!' || x == 'm') 
res3: String = Hey there It's e yself and I. 

Answer 4

試試這個，應當編制：

val str = """ 
    |case time (especially it's purse), read manual care, follow care instructions make stays waterproof -- example, inspect rubber seals doors (especially battery/memory card door open time) 
    |xm "life support" picture . flip part bit flimsy guessing won't long . sound great altec speaker dock it! chance back base (xm3020) . traveling bag connect laptop extra speaker . amount paid ($25). 
    """.stripMargin('|') 

println(str) 
val pat = """[^\w\s\.\$]""" 
val pat2 = """\s\w{2}\s""" 
println(str.replaceAll(pat, "").replaceAll(pat2, "")) 

OUTPUT：

case time especially its purse read manual care follow care instructions make stays waterproof example inspect rubber seals doors especially batterymemory card door open time 
life support picture . flip part bit flimsy guessing wont long . sound great altec speaker dockchance back base xm3020 . traveling bag connect laptop extra speaker . amount paid $25.