给定字符串“ThisStringHasNoSpacesButItDoesHaveCapitals”,什么是在大写字母之前添加空格的最好方法。所以结尾字符串是"This string Has No space But It Does Have大写"
下面是我使用正则表达式的尝试
System.Text.RegularExpressions.Regex.Replace(value, "[A-Z]", " $0")
给定字符串“ThisStringHasNoSpacesButItDoesHaveCapitals”,什么是在大写字母之前添加空格的最好方法。所以结尾字符串是"This string Has No space But It Does Have大写"
下面是我使用正则表达式的尝试
System.Text.RegularExpressions.Regex.Replace(value, "[A-Z]", " $0")
当前回答
以下是我的解决方案,基于Binary Worriers的建议和Richard Priddys的评论,但也考虑到空白可能存在于提供的字符串中,所以它不会在现有空白旁边添加空白。
public string AddSpacesBeforeUpperCase(string nonSpacedString)
{
if (string.IsNullOrEmpty(nonSpacedString))
return string.Empty;
StringBuilder newText = new StringBuilder(nonSpacedString.Length * 2);
newText.Append(nonSpacedString[0]);
for (int i = 1; i < nonSpacedString.Length; i++)
{
char currentChar = nonSpacedString[i];
// If it is whitespace, we do not need to add another next to it
if(char.IsWhiteSpace(currentChar))
{
continue;
}
char previousChar = nonSpacedString[i - 1];
char nextChar = i < nonSpacedString.Length - 1 ? nonSpacedString[i + 1] : nonSpacedString[i];
if (char.IsUpper(currentChar) && !char.IsWhiteSpace(nextChar)
&& !(char.IsUpper(previousChar) && char.IsUpper(nextChar)))
{
newText.Append(' ');
}
else if (i < nonSpacedString.Length)
{
if (char.IsUpper(currentChar) && !char.IsWhiteSpace(nextChar) && !char.IsUpper(nextChar))
{
newText.Append(' ');
}
}
newText.Append(currentChar);
}
return newText.ToString();
}
其他回答
之前所有的回答看起来都太复杂了。
我有一个字符串,它混合使用了大写字母和_,string. replace()来生成_," "并使用下面的代码在大写字母处添加一个空格。
for (int i = 0; i < result.Length; i++)
{
if (char.IsUpper(result[i]))
{
counter++;
if (i > 1) //stops from adding a space at if string starts with Capital
{
result = result.Insert(i, " ");
i++; //Required** otherwise stuck in infinite
//add space loop over a single capital letter.
}
}
}
下面是在SQL中如何做到这一点
create FUNCTION dbo.PascalCaseWithSpace(@pInput AS VARCHAR(MAX)) RETURNS VARCHAR(MAX)
BEGIN
declare @output varchar(8000)
set @output = ''
Declare @vInputLength INT
Declare @vIndex INT
Declare @vCount INT
Declare @PrevLetter varchar(50)
SET @PrevLetter = ''
SET @vCount = 0
SET @vIndex = 1
SET @vInputLength = LEN(@pInput)
WHILE @vIndex <= @vInputLength
BEGIN
IF ASCII(SUBSTRING(@pInput, @vIndex, 1)) = ASCII(Upper(SUBSTRING(@pInput, @vIndex, 1)))
begin
if(@PrevLetter != '' and ASCII(@PrevLetter) = ASCII(Lower(@PrevLetter)))
SET @output = @output + ' ' + SUBSTRING(@pInput, @vIndex, 1)
else
SET @output = @output + SUBSTRING(@pInput, @vIndex, 1)
end
else
begin
SET @output = @output + SUBSTRING(@pInput, @vIndex, 1)
end
set @PrevLetter = SUBSTRING(@pInput, @vIndex, 1)
SET @vIndex = @vIndex + 1
END
return @output
END
我想用这个
string InsertSpace(string text ) {
return string.Join("" , text.Select(ch => char.IsUpper(ch) ? " " : "" + ch)) ;
}
以下是我的解决方案,基于Binary Worriers的建议和Richard Priddys的评论,但也考虑到空白可能存在于提供的字符串中,所以它不会在现有空白旁边添加空白。
public string AddSpacesBeforeUpperCase(string nonSpacedString)
{
if (string.IsNullOrEmpty(nonSpacedString))
return string.Empty;
StringBuilder newText = new StringBuilder(nonSpacedString.Length * 2);
newText.Append(nonSpacedString[0]);
for (int i = 1; i < nonSpacedString.Length; i++)
{
char currentChar = nonSpacedString[i];
// If it is whitespace, we do not need to add another next to it
if(char.IsWhiteSpace(currentChar))
{
continue;
}
char previousChar = nonSpacedString[i - 1];
char nextChar = i < nonSpacedString.Length - 1 ? nonSpacedString[i + 1] : nonSpacedString[i];
if (char.IsUpper(currentChar) && !char.IsWhiteSpace(nextChar)
&& !(char.IsUpper(previousChar) && char.IsUpper(nextChar)))
{
newText.Append(' ');
}
else if (i < nonSpacedString.Length)
{
if (char.IsUpper(currentChar) && !char.IsWhiteSpace(nextChar) && !char.IsUpper(nextChar))
{
newText.Append(' ');
}
}
newText.Append(currentChar);
}
return newText.ToString();
}
这个问题包括首字母缩写词和首字母缩写复数,比公认的答案快一点:
public string Sentencify(string value)
{
if (string.IsNullOrWhiteSpace(value))
return string.Empty;
string final = string.Empty;
for (int i = 0; i < value.Length; i++)
{
if (i != 0 && Char.IsUpper(value[i]))
{
if (!Char.IsUpper(value[i - 1]))
final += " ";
else if (i < (value.Length - 1))
{
if (!Char.IsUpper(value[i + 1]) && !((value.Length >= i && value[i + 1] == 's') ||
(value.Length >= i + 1 && value[i + 1] == 'e' && value[i + 2] == 's')))
final += " ";
}
}
final += value[i];
}
return final;
}
通过以下测试:
string test1 = "RegularOTs";
string test2 = "ThisStringHasNoSpacesASCIIButItDoesHaveCapitalsLINQ";
string test3 = "ThisStringHasNoSpacesButItDoesHaveCapitals";