代码片段仓库

import requests

def fetch_web_page(url):
    try:
        response = requests.get(url, timeout=10)
        response.raise_for_status()  # Raise error for bad status
        return response.text
    except requests.exceptions.RequestException as e:
        return f"Error: {e}"

const deepClone = (obj) => {
  if (typeof obj !== 'object' || obj === null) return obj;
  
  let cloned;
  if (Array.isArray(obj)) {
    cloned = [];
    for (let i = 0; i < obj.length; i++) {
      cloned[i] = deepClone(obj[i]);
    }
  } else {
    cloned = {};
    for (const key in obj) {
      if (obj.hasOwnProperty(key)) {
        cloned[key] = deepClone(obj[key]);
      }
    }
  }
  return cloned;
}

import pandas as pd

# Create a DataFrame
data = {
    'Name': ['Alice', 'Bob', 'Charlie'],
    'Age': [25, 30, 22],
    'City': ['New York', 'London', 'Paris']
}

df = pd.DataFrame(data)

# Display first 2 rows
print(df.head(2))

# Calculate mean age
print("\nMean Age:", df, Age'].mean())

#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;
}

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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();
    }
}