C# CharEnumerator.Clone()用法及代碼示例

CharEnumerator.Clone方法用於創建當前CharEnumerator對象的副本。這對於在迭代String對象時保存當前狀態很有用。

用法:

public object Clone ();

返回值：此方法返回一個Object，它是當前CharEnumerator對象與CharEnumerator對象的當前狀態的副本。

以下示例程序旨在說明CharEnumerator.Clone()方法的使用：

示例1:

// C# program to illustrate the 
// CharEnumerator.Clone Method 
using System; 
  
class GFG { 
  
    // Driver code 
    public static void Main() 
    { 
        // Initialize a string object 
        string str = "The Sun rises in the East,sets in the West."; 
  
        // Instantiate a CharEnumerator object 
        CharEnumerator chEnum = str.GetEnumerator(); 
  
        while (chEnum.MoveNext())  
        { 
            // Printing the characters 
            Console.Write(chEnum.Current); 
  
            // Break when a space is encountered 
            if (chEnum.Current == ',')  
            { 
                Console.WriteLine(); 
                break; 
            } 
        } 
  
        // Instantiate a copy of CharEnumerator 
        // object with the current state 
        CharEnumerator chEnumCopy = (CharEnumerator)chEnum.Clone(); 
  
        // Printing the rest of the characters 
        while (chEnumCopy.MoveNext()) 
            Console.Write(chEnumCopy.Current); 
    } 
}

輸出：

The Sun rises in the East,
sets in the West.

示例2:

// C# program to illustrate the 
// CharEnumerator.Clone Method 
using System; 
  
class GFG { 
  
    // Driver code 
    public static void Main() 
    { 
        // Initialize a string object 
        string str = "1234567"; 
  
        // Instantiate a CharEnumerator object 
        CharEnumerator chEnum = str.GetEnumerator(); 
  
        while (chEnum.MoveNext()) 
        { 
            // Print current character 
            Console.Write(chEnum.Current + " "); 
  
            // Instantiate a copy of CharEnumerator  
            // object with current state 
            CharEnumerator chEnumCopy = (CharEnumerator)chEnum.Clone(); 
  
            // Printing all characters  
            // after the current position 
            while (chEnumCopy.MoveNext()) 
                Console.Write(chEnumCopy.Current + " "); 
  
            Console.WriteLine(); 
        } 
    } 
}

輸出：

1 2 3 4 5 6 7 
2 3 4 5 6 7 
3 4 5 6 7 
4 5 6 7 
5 6 7 
6 7 
7

參考：

https://docs.microsoft.com/en-us/dotnet/api/system.charenumerator.clone?view=netframework-4.7.2

相關用法

注：本文由純淨天空篩選整理自rupesh_rao大神的英文原創作品 C# | CharEnumerator.Clone() Method。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。