正则表达式替换

Question

我需要一个Reg Ex脚本

• 删除所有符号
• 允许最大1连字符相互连接
• 允许最大1期共计

示例：

• Mike&Ike 输出是: MikeIke
• 迈克-艾克的输出是:迈克-艾克
• 迈克-艾克-吉尔的输出是:迈克-艾克-吉尔
• Ike-Jill输出是: Mike-Ike-Jill
• 迈克-艾克-吉尔输出是:迈克-艾克-吉尔
• Mike.Ike.Bill 输出为: Mike.IkeBill
• Joe输出是: MikeJoe
• Mike123 输出为: Mike123

Answer 1

你可以通过几次传球就能做点什么。

这是一种通用的解决方法，可以通过使用lookbehind来缩短。

(并非所有regex口味都支持此功能)

1. 用regex -删除多个-{2,}
2. 删除符号，但-.和regex [^-\.A-Za-z0-9]除外
3. 将第一个.替换为临时字符，例如!，并替换剩余的.
4. 将最后一步的!替换为.

使用更新C# .net

(我不是C#程序员，我使用这个regex测试仪和这个参考文献来实现C# .net regex风格。)

String str = "Mike&Ike ......";
str = Regex.Replace( str, @"-+", @"-" );
str = Regex.Replace( str, @"(?<=\.)(.*?)\.", @"$1" );
str = Regex.Replace( str, @"[^\w\r\n]", @"" );

1. 用单-代替multipe -
2. 如果不是第一次使用正向后查找.的.，则删除(?<=...)
3. 删除符号(实际上所有东西--不是单词、字符或换行符)-- \w是[A-Za-z0-9]的缩写

Answer 2

#!/usr/bin/env perl

use 5.10.0;
use strict;
use warnings;

my @samples = (
    "Mike&Ike"          => "MikeIke",
    "Mike-Ike"          => "Mike-Ike",
    "Mike-Ike-Jill"     => "Mike-Ike-Jill",
    "Mike--Ike-Jill"    => "Mike-Ike-Jill",
    "Mike--Ike---Jill"  => "Mike-Ike-Jill",
    "Mike.Ike.Bill"     => "Mike.IkeBill",
    "Mike***Joe"        => "MikeJoe",
    "Mike123"           => "Mike123",
);

while (my($got, $want) = splice(@samples, 0, 2)) {
    my $had = $got;
    for ($got) {
  # 1) Allow max 1 dashy bit connected to each other.
        s/ ( \p{Dash} ) \p{Dash}+                           /$1/xg;
  # 2) Allow max 1 period, total.
        1 while s/ ^ [^.]* \. [^.]* \K \.                   //x   ;
  # 3) Remove all symbols...
        s/ (?! [\p{Dash}.] ) [\p{Symbol}\p{Punctuation}]    //xg  ;
  #                   ...and punctuation
  #       except for dashy bits and dots.
    }

    if ($got eq $want) { print "RIGHT" }
    else               { print "WRONG" }
    print ":\thad\t<$had>\n\twanted\t<$want>\n\tgot\t<$got>\n";
}

生成：

RIGHT:  had <Mike&Ike>
    wanted  <MikeIke>
    got <MikeIke>
RIGHT:  had <Mike-Ike>
    wanted  <Mike-Ike>
    got <Mike-Ike>
RIGHT:  had <Mike-Ike-Jill>
    wanted  <Mike-Ike-Jill>
    got <Mike-Ike-Jill>
RIGHT:  had <Mike--Ike-Jill>
    wanted  <Mike-Ike-Jill>
    got <Mike-Ike-Jill>
RIGHT:  had <Mike--Ike---Jill>
    wanted  <Mike-Ike-Jill>
    got <Mike-Ike-Jill>
RIGHT:  had <Mike.Ike.Bill>
    wanted  <Mike.IkeBill>
    got <Mike.IkeBill>
RIGHT:  had <Mike***Joe>
    wanted  <MikeJoe>
    got <MikeJoe>
RIGHT:  had <Mike123>
    wanted  <Mike123>
    got <Mike123>