我找到了很多关于如何在大写字母上拆分字符串的例子,例如:
"MyNameIsRob"
返回"My Name Is Rob"
我的情景有点不同......
我想完成以下任务:
"MyFavouriteChocIsDARKChocalate"
应该返回"My Favourite Choc Is DARK Chocalate"
我能想到这样做的唯一方法是,如果下一个字符是小写的话,只将字符串拆分为upperacase。
关于如何实现这一目标的任何想法?
答案 0 :(得分:5)
您可以使用lookahead和lookbehind进行正则表达式替换,以便在它之前或之后用小写字母查找大写...
var input = "MyFavouriteChocIsDARKChocalate";
var output = Regex.Replace(input, "(((?<!^)[A-Z](?=[a-z]))|((?<=[a-z])[A-Z]))", " $1");
Console.WriteLine(output);
答案 1 :(得分:2)
没有正则表达式,你可以使用它:
public static string SplitOnCaps(string s)
http://dotnetfiddle.net/qQIIgX:
using System;
using System.Collections.Generic;
using System.Text;
public class Program
{
public static void Main()
{
/*"MyFavouriteChocIsDARKChocalate" should return "My Favourite Choc Is DARK Chocalate"*/
var input = "MyFavouriteChocIsDARKChocalate";
var split = SplitOnCaps(input);
Console.WriteLine(input + " --> " + split);
var match = "My Favourite Choc Is DARK Chocalate";
Console.WriteLine(split == match ? "Match" : "No Match");
}
public static string SplitOnCaps(string s)
{
var splits = new List<int>();
var chars = s.ToCharArray();
for(var i=1; i<chars.Length-1; i++)
{
if (IsCapital(chars[i]) && !IsCapital(chars[i+1]) ||
IsCapital(chars[i]) && !IsCapital(chars[i-1]))
{
splits.Add(i);
}
}
var sb = new StringBuilder();
var lastSplit = 0;
foreach(var split in splits)
{
sb.Append(s.Substring(lastSplit, split - lastSplit) + " ");
lastSplit = split;
}
sb.Append(s.Substring(lastSplit));
return sb.ToString();
}
public static bool IsCapital(char c)
{
var i = (int)c;
return i>=65 && i<=90;
}
}
注意:我不熟练使用Regex
答案 2 :(得分:1)
也许经典方法符合您的需求:
private static string[] SplitSpecial(string s)
{
List<string> tmp = new List<string>();
int lastindex = 0;
for (int i = 1; i < s.Length; i++)
if (Char.IsUpper(s[i]) && (Char.IsLower(s[i - 1]) || (i < s.Length - 1 && Char.IsLower(s[i + 1]))))
{
if (i > lastindex)
tmp.Add(s.Substring(lastindex, i - lastindex));
lastindex = i;
}
tmp.Add(s.Substring(lastindex, s.Length - lastindex));
return tmp.ToArray();
}
要制作单个字符串,您可以String.Join
生成的数组:
string singleStr = String.Join(" ", SplitSpecial("MyFavouriteChocIsDARKChocalate"));
答案 3 :(得分:1)
经典方法+使用stringBuilder(如果使用长字符串,效率更高):
string str = "MyFavouriteChocIsDARKChocalate";
System.Text.StringBuilder output = new System.Text.StringBuilder(str.Substring(0,1));
for (int i = 1; i < str.Length; i++)
{
if (Char.IsUpper(str[i]) && (!char.IsUpper(str[i-1]) || (i+1 < str.Length && char.IsLower(str[i+1]))))
{
output.Append(" " + str[i]);
}
else
{
output.Append(str[i]);
}
}
string result = output.ToString();