I'm using the regex
我使用正则表达式
System.Text.RegularExpressions.Regex.Replace(stringToSplit, "([A-Z])", "
I'm using the regex
我使用正则表达式
System.Text.RegularExpressions.Regex.Replace(stringToSplit, "([A-Z])", " $1").Trim()
to split strings by capital letter, for example:
用大写字母分割字符串，例如:
'MyNameIsSimon' becomes 'My Name Is Simon'
“MyNameIsSimon”变成了“我的名字是西蒙”
I find this incredibly useful when working with enumerations. What I would like to do is change it slightly so that strings are only split if the next letter is a lowercase letter, for example:
我发现这在使用枚举时非常有用。我想做的是稍微改变一下，这样只有当下一个字母是小写字母时，字符串才会被分割，例如:
'USAToday' would become 'USA Today'
“今日美国”将成为“今日美国”
Can this be done?
这个可以做吗?
EDIT: Thanks to all for responding. I may not have entirely thought this through, in some cases 'A' and 'I' would need to be ignored but this is not possible (at least not in a meaningful way). In my case though the answers below do what I need. Thanks!
编辑:感谢大家的回复。我可能没有完全考虑过这个问题，在某些情况下，“A”和“I”需要被忽略，但这是不可能的(至少不是以一种有意义的方式)。就我而言，下面的答案可以满足我的需要。谢谢!
7 个解决方案
#1
40
((?<=[a-z])[A-Z]|[A-Z](?=[a-z]))
or its Unicode-aware cousin
或其能够处理unicode的表弟
((?<=\p{Ll})\p{Lu}|\p{Lu}(?=\p{Ll}))
when replaced globally with
当全球换成
" $1"
handles
处理
TodayILiveInTheUSAWithSimon
USAToday
IAmSOOOBored
yielding
屈服
Today I Live In The USA With Simon
USA Today
I Am SOOO Bored
In a second step you'd have to trim the string.
第二步，你得把绳子修剪一下。
#2
11
any uppercase character that is not followed by an uppercase character:
任何大写字符，后面没有大写字符:
Replace(string, "([A-Z])(?![A-Z])", " $1")
Edit:
编辑:
I just noticed that you're using this for enumerations. I really do not encourage using string representations of enumerations like this, and the problems at hand is a good reason why. Have a look at this instead: https://www.refactoring.com/catalog/replaceTypeCodeWithClass.html
我刚刚注意到你在用它进行枚举。我真的不鼓励像这样使用枚举的字符串表示，手边的问题是一个很好的理由。看看这个:https://www.refactoring.com/catalog/replaceTypeCodeWithClass.html
#3
1
You might think about changing the enumerations; MS coding guidelines suggest Pascal casing acronyms as though they were words; XmlDocument, HtmlWriter, etc. Two-letter acryonyms don't follow this rule, though; System.IO.
您可以考虑更改枚举数;编码指南建议Pascal的缩写词就像单词一样;但是，XmlDocument、HtmlWriter等两个字母的丙烯腈不遵循此规则;先。
So you should be using UsaToday, and your problem will disappear.
所以你应该用UsaToday，这样你的问题就消失了。
#4
1
I hope this will help you regarding splitting a string by its capital letters and much more. You can try using Humanizer, which is a free nuget package. This will save you for more trouble with letters, sentences, numbers, quantities and much more in many languages. Check out this at: https://www.nuget.org/packages/Humanizer/
我希望这能帮助你用它的大写字母来分割一个字符串。你可以尝试使用Humanizer，这是一个免费的nuget包。这将为你在许多语言中避免更多的字母、句子、数字、数量和更多的麻烦。看看这个:https://www.nuget.org/packages/Humanizer/
#5
0
Tomalak's expression worked for me, but not with the built-in Replace function. Regex.Replace(), however, did work.
Tomalak的表达式对我来说是有效的，但是没有内置的替换功能。然而,Regex.Replace()所做的工作。
For i As Integer = 0 To names.Length - 1
'Worked
names(i) = Regex.Replace(names(i), "((?<=[a-z])[A-Z]|[A-Z](?=[a-z]))", " $1").TrimStart()
' Didn't work
'names(i) = Replace(names(i), "([A-Z])(?=[a-z])|(?<=[a-z])([A-Z])", " $1").TrimStart()
Next
BTW, I'm using this to split the words in enumeration names for display in the UI and it works beautifully.
顺便说一句，我用它来分割枚举名称中的单词，以便在UI中显示，它工作得很好。
#6
0
Note: I didn't read the question good enough, USAToday will return "Today"; so this anwser isn't the right one.
注:我读的问题不够好，USAToday将返回“Today”;所以这个不是正确的。
public static List<string> SplitOnCamelCase(string text)
{
List<string> list = new List<string> ();
Regex regex = new Regex(@"(\p{Lu}\p{Ll}+)");
foreach (Match match in regex.Matches(text))
{
list.Add (match.Value);
}
return list;
}
This will match "WakeOnBoot" as "Wake On Boot" and doesn't return anything on NMI or TLA
这将匹配“WakeOnBoot”作为“启动”，并且不会在NMI或TLA上返回任何东西。
#7
0
My version that also handles simple arithmetic expressions:
我的版本也处理简单的算术表达式:
private string InjectSpaces(string s)
{
var patterns = new string[] {
@"(?<=[^A-Z,&])[A-Z]", // match capital preceded by any non-capital except ampersand
@"(?<=[A-Z])[A-Z](?=[a-z])", // match capital preceded by capital and followed by lowercase letter
@"[\+\-\*\/\=]", // match arithmetic operators
@"(?<=[\+\-\*\/\=])[0-9,\(]" // match 0-9 or open paren preceded by arithmetic operator
};
var pattern = $"({string.Join("|", patterns)})";
return Regex.Replace(s, pattern, " $1");
}
").Trim()
System.Text.Re
