[英]How to capitalize the first character of every sentence
使用接受字符串作為參數的方法創建應用程序,並返回字符串的副本,其中每個句子的第一個字符都大寫。
這就是我必須做的事情,但我似乎無法做到:
//Create method to process string.
private string Sentences(string input)
{
//Capitalize first letter of input.
char firstLetter = char.ToUpper(input[0]);
//Combine the capitalize letter with the rest of the input.
input = firstLetter.ToString() + input.Substring(1);
//Create a char array to hold all characters in input.
char[] letters = new char[input.Length];
//Read the characters from input into the array.
for (int i = 0; i < input.Length; i++)
{
letters[i] = input[i];
}
//Loop through array to test for punctuation and capitalize a character 2 index away.
for (int index = 0; index < letters.Length; index++)
{
if(char.IsPunctuation(letters[index]))
{
if (!((index + 2) >= letters.Length))
{
char.ToUpper(letters[index+ 2]);
}
}
}
for(int ind = 0; ind < letters.Length; ind++)
{
input += letters[ind].ToString();
}
return input;
}
我建議使用正則表達式來識別句子中的所有點。 獲取匹配項,將其設為大寫,然后在匹配索引中將其替換回原始句子中。 我現在實際上沒有任何可以在 .NET 上嘗試代碼的 IDE,但我可以用偽代碼編寫它以便更好地理解。
String setence = "your.setence.goes.here";
Regex rx = new Regex("/\..*?[A-Z]/");
foreach (Match match in rx.Matches(sentence))
{
setence.remove(match.Index, 2).insert(match.Index, String.ToUpper(match.Value));
}
您可以使用Linq.Aggregate
n - 請參閱代碼和代碼輸出中的注釋以了解其工作原理。
這個也會尊重“Bla. blubb”——你需要在“.?!”之后檢查空格。
using System;
using System.Linq;
internal class Program
{
static string Capitalize(string oldSentence )
{
return
// this will look at oldSentence char for char, we start with a
// new string "" (the accumulator, short acc)
// and inspect each char c of oldSentence
// comment all the Console.Writelines in this function, thats
// just so you see whats done by Aggregate, not needed for it to
// work
oldSentence
.Aggregate("", (acc, c) =>
{
System.Console.WriteLine("Accumulated: " + acc);
System.Console.WriteLine("Cecking: " + c);
// if the accumulator is empty or the last character of
// trimmed acc is a ".?!" we append the
// upper case of c to it
if (acc.Length == 0 || ".?!".Any(p => p == acc.Trim().Last())) // (*)
acc += char.ToUpper(c);
else
acc += c; // else we add it unmodified
System.Console.WriteLine($"After: {acc}\n");
return acc; // this returns the acc for the next iteration/next c
});
}
static void Main(string[] args)
{
Console.SetBufferSize(120, 1000);
var oldSentence = "This is a testSentence. some occurences "
+ "need capitalization! for examlpe here. or here? maybe "
+ "yes, maybe not.";
var newSentence = Capitalize(oldSentence);
Console.WriteLine(new string('*', 80));
Console.WriteLine(newSentence);
Console.ReadLine();
}
}
(*)
".?!".Any(p => p == ... ))
表示字符串".?!"
包含任何等於...
acc.Trim().Last()
表示:刪除acc
前面/末尾的空格並給我最后一個字符 .Last()
和.Any()
也是 Linq。 大多數 Linq-esc 擴展都可以在這里找到: https : //msdn.microsoft.com/en-us/library/9eekhta0(v= vs.110).aspx
輸出(剪斷 - 它相當長;o)
Accumulated:
Cecking: T
After: T
Accumulated: T
Cecking: h
After: Th
Accumulated: Th
Cecking: i
After: Thi
Accumulated: Thi
Cecking: s
After: This
Accumulated: This
Cecking:
After: This
Accumulated: This
Cecking: i
After: This i
Accumulated: This i
Cecking: s
After: This is
<snipp - .. you get the idea how Aggregate works ...>
Accumulated: This is a testSentence.
Cecking: s
After: This is a testSentence. S
<snipp>
Accumulated: This is a testSentence. Some occurences need capitalization!
Cecking: f
After: This is a testSentence. Some occurences need capitalization! F
<snipp>
********************************************************************************
This is a testSentence. Some occurences need capitalization! For examlpe here. Or here? Maybe yes, maybe not.
你有兩個任務:
1) 將文本拆分成句子 2) 將句子中的第一個字符大寫
任務一可能非常復雜,例如因為那里有很多瘋狂的語言。 既然這是作業,我假設您可以繼續並簡單地按眾所周知的分隔符拆分。
任務二只是基本的字符串操作。 您選擇第一個字符,使其大寫,然后通過子字符串操作添加句子的缺失部分。
這是一個代碼示例:
char[] separators = new char[] { '!', '.', '?' };
string[] sentencesArray = "First sentence. second sentence!lastone.".Split(separators, StringSplitOptions.RemoveEmptyEntries);
var i = 0;
Array.ForEach(sentencesArray, e =>
{
sentencesArray[i] = e.Trim().First().ToString().ToUpper() +
e.Trim().Substring(1);
i++;
});
我在 Groovy 中為此創建了一個方法
String capitalizeFirstCharInSentence(String str) {
String result = ''
str = str.toLowerCase()
List<String> strings = str.tokenize('.')
strings.each { line ->
StringBuilder builder = new StringBuilder(line)
int i = 0
while (i < builder.size() - 1 && !Character.isLowerCase(builder.charAt(i))) {
i++
}
if (Character.isLowerCase(builder.charAt(i))) {
builder.setCharAt(i, builder.charAt(i).toUpperCase())
result += builder.toString() + '.'
}
}
return result
}
我喜歡你格式化方法的方式,因為它使新的編碼人員更容易閱讀,所以我決定嘗試在保持結構的同時使代碼工作。 我看到的主要問題是您在格式化數組后沒有替換它們。
//Create method to process string.
private string Sentences(string input)
{
//Create a char array to hold all characters in input.
char[] letters = new char[input.Length];
//Read the characters from input into the array.
for (int i = 0; i < input.Length; i++)
{
letters[i] = input[i];
}
//Capitalize first letter of input.
letters[0] = char.ToUpper(letters[0]);
//Loop through array to test for punctuation and capitalize a character 2 index away.
for (int index = 0; index < letters.Length; index++)
{
if(char.IsPunctuation(letters[index]))
{
if (index + 2 <= letters.Length)
{
letters[index + 2] = char.ToUpper(letters[index+ 2]);
}
}
}
// convert array back to string
string results = new string(letters)
return results;
}
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