Asynchronous Programming Development Tutorials, Guides & Insights

import asyncio

async def greet():
    print("Hello!")
    await asyncio.sleep(1)
    print("Goodbye!")

asyncio.run(greet())

Combine multiple coroutines to run concurrently:

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  const handler = {
      set(target, prop, value) {
          if (typeof value === 'number') {
              target[prop] = value;
              return true;
          } else {
              console.error(`Property '${prop}' must be a number.`);
              return false;
          }
      }
  };

  const proxy = new Proxy({}, handler);
  proxy.age = 30; // Works fine
  proxy.age = 'thirty'; // Output: Property 'age' must be a number.

• apply: Intercepts function calls.

Callback Hell:

While callbacks are useful, they can lead to a situation known as "callback hell" when you have multiple nested asynchronous operations, making the code difficult to read and maintain.

An async function in Rust is a function that returns a Future. A Future is a value that represents a computation that may not have completed yet. By marking a function as async, you tell the Rust compiler that the function contains asynchronous operations.

async fn fetch_data(url: &str) -> Result<String, reqwest::Error> {
    let response = reqwest::get(url).await?;
    let body = response.text().await?;
    Ok(body)
}