Async Programming
Handle asynchronous operations with promises, async/await, and callbacks. Build responsive applications that handle API calls, file operations, and time-delayed tasks without blocking execution.
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What You'll Learn
Callbacks and callback hell
Promises and promise chaining
Async/await syntax
Error handling in async code
Parallel vs sequential execution
Fetch API and HTTP requests
Frequently Asked Questions
What is the difference between callbacks, promises, and async/await?
Callbacks are functions passed to handle async results but can lead to callback hell. Promises provide a cleaner chain-able interface. Async/await is syntactic sugar over promises that makes async code look synchronous.
How do I handle errors in async/await code?
Use try/catch blocks around await statements. The catch block handles both promise rejections and thrown errors. Always include error handling for robust async code.
What is the difference between Promise.all() and Promise.race()?
Promise.all() waits for all promises to complete and returns an array of results. It rejects if any promise fails. Promise.race() returns when the first promise settles, whether resolved or rejected.
Ready to Master Async Programming?
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