代码片段仓库

SELECT
  NOW() AS current_datetime,
  DATE_FORMAT(NOW(), '%Y,%m-%d') AS formatted_date,
  DATE_ADD(NOW(), INTERVAL 7 DAY) AS next_week;

const audioContext = new (window.AudioContext || window.webkitAudioContext)();

function playAudio(source) {
  const audio = new Audio();
  audio.src = source;
  audio.play();
}

if (navigator.mediaDevices) {
  navigator.mediaDevices.getUserMedia({ audio: true })
    .then(stream => {
      const mediaSource = audioContext.createMediaStreamSource(stream);
      mediaSource.connect(audioContext.destination);
    })
    .catch(error => console.error('Microphon error:', error));
} else {
  console.log('GetUserMedia not supported');
}

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from sklearn.cluster import Kmeans
import numpy as np

Means = Kmeans(n_clusters=3)
data = np.array([[1, 2], [1, 4], [1, 0], [10, 12], [15, 18], [8, 10]])
model = Means.fit(data)

print(model.cluster_centers_)
print(model.labels_)

public class SimpleServer {
    public static void main(String[] args) throws IOException {
        try (ServerSocket serverSocket = new ServerSocket(8080)) {
            System.out.println("Server listening on port 8080");
            
            while (true) {
                Socket clientSocket = serverSocket.accept();
                
                new Thread(() -> {
                    try (BufferedReader in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
                        BufferedWriter out = new BufferedWriter(new OutputStreamWriter(clientSocket.getOutputStream()))) {
                        String inputLine;
                        while ((inputLine = in.readLine()) != null) {
                            out.write("Echo: " + inputLine);
                            out.newLine();
                            out.flush();
                        }
                    } finally {
                        clientSocket.close();
                    }
                }).start();
            }
        }
    }
}

#include <catch2/catch.hpp>

int add(int a, int b) {
    return a + b;
}

�CATCH_TEST("Add function", "[add]") {
    REQUIRE(add(1, 1) == 2);
    REQUIRE(add(2, 3) == 5);
}