如何从字符串中删除字符？

# 使用replace()方法删除字符
original_string = "Hello, World!"
char_to_remove = "o"
new_string = original_string.replace(char_to_remove, "")
print(new_string)  # 输出: Hell, Wrld!

# 使用正则表达式删除字符
import re
new_string = re.sub(char_to_remove, "", original_string)
print(new_string)  # 输出: Hell, Wrld!

// 使用replace()方法删除字符
let originalString = "Hello, World!";
let charToRemove = "o";
let newString = originalString.replace(new RegExp(charToRemove, 'g'), '');
console.log(newString);  // 输出: Hell, Wrld!

// 使用正则表达式删除字符
newString = originalString.replace(/o/g, '');
console.log(newString);  // 输出: Hell, Wrld!

// 使用StringBuilder删除字符
String originalString = "Hello, World!";
char charToRemove = 'o';
StringBuilder sb = new StringBuilder(originalString);
for (int i = 0; i < sb.length(); i++) {
    if (sb.charAt(i) == charToRemove) {
        sb.deleteCharAt(i);
        i--;  // 因为删除了一个字符，所以索引需要回退一步
    }
}
String newString = sb.toString();
System.out.println(newString);  // 输出: Hell, Wrld!

// 使用String.replaceAll()方法删除字符
newString = originalString.replaceAll(String.valueOf(charToRemove), "");
System.out.println(newString);  // 输出: Hell, Wrld!

// 使用String.Replace()方法删除字符
string originalString = "Hello, World!";
char charToRemove = 'o';
string newString = originalString.Replace(charToRemove.ToString(), "");
Console.WriteLine(newString);  // 输出: Hell, Wrld!

// 使用正则表达式删除字符
newString = Regex.Replace(originalString, charToRemove.ToString(), "");
Console.WriteLine(newString);  // 输出: Hell, Wrld!