代码片段仓库

import time

def time_it(func):
    def wrapper(***args):
        start = time.time()
        result = func(***args)
        end = time.time()
        print(f"Execution time: {end - start} s")
        return result
    return wrapper

@time_it
def sleep_demo(seconds):
    time.sleep(seconds)
    return "Done"

public class ReflectionDemo {
    public static void main(String[] args) throws Exception {
        Class<?> clazz = Class.forName("java.util.ArrayList");
        Object list = clazz.getDeclaredConstructor().newInstance();
        Method addMethod = clazz.getMethod("add", Object.class);
        addMethod.invoke(list, "Hello Reflection!");
        System.out.println(list);
    }
}

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

int main() {
    map<string, int> scores;
    
    // Insert elements
    scores["Alice"] = 90;
    scores["Bob"] = 85;
    scores["Charlie"] = 95;
    
    // Access elements
    cout << "Charlie's score: " << scores["Charlie"] << endl;
    
    // Iterate over map
    for (const auto& keyValue : scores) {
        cout << keyValue.first << ": " << keyValue.second << endl;
    }
    return 0;
}

CREATE TRIGGER before_update_users
ON USERS FOR EACH ROW
BEGIN
    INSERT INTO user_audit (user_id, old_name, new_name, change_date)
    VALUES (OLD.id, OLD.name, NEW.name, NOW());
END;

function* fibonacciSequence() {
  let [a, b] = [0, 1];
  while (true) {
    yield a;
    [a, b] = [b, a + b];
  }
}

const gen = fibonacciSequence();

console.log(gen.next().value); // 0
console.log(gen.next().value); // 1
console.log(gen.next().value); // 1
console.log(gen.next().value); // 2

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