删除标点符号格式的文本 - 星火

Question

这是我的数据的一个样本：

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). 

我想删除所有标点符号除了点，并与length < = 2删除的话，比如我的预期输出（）。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 . 

，这应该在Scala中实现， 我已经试过：

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

但无法正常工作，任何人都可以帮助我吗？

Answer 1

望着正则表达式的javadoc（http://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html ），我们看到标点符号的字符类是\p{Punct}，我们可以删除来自角色类的字符使用[a-z&&[^def]]。从那以后，很容易定义一个正则表达式，将删除所有标点符号除了点：

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

删除单词，大小< = 2可以像这样做：

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

结合了两下，这给出：

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

请注意我如何添加\s*删除冗余空间。

此外，你可以看到上述正则表达式完全删除'$'，因为它是一个标点符号（由unicode定义）。 如果这是不可取的（似乎表明您的预期输出），请更精确地考虑标点符号。 例如，你可能希望只考虑下列字符为标点符号：?.!:()：

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

或者，你可以只添加“$”您“不标点”人物名单，以点一起：

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

Answer 2

如何：

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

然后你只需要添加更多的标点符号使用删除|，并确保逃避像字符（和）双反斜线？

Answer 3

你可以尝试过滤这样的字符串：

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

试试这个，应当编制：

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.