Coding - Write a Debounce Function

Full Interview Question: "Coding - Write a Debounce Function" asked at Apple

Problem

Implement a debounce(fn, wait) utility in JavaScript. A debounced function delays invoking fn until wait milliseconds have elapsed since the last time the debounced function was called. If fn is invoked again before wait milliseconds have elapsed, the timer is reset and the previous invocation is cancelled.

Constraints:

• fn is a function that you want to debounce.
• wait is the number of milliseconds to delay.

Examples: `javascript // Example usage: const debouncedFunction = debounce(() => { console.log('Function called'); }, 2000);

debouncedFunction(); // This will not log anything immediately setTimeout(() => { debouncedFunction(); // This will log 'Function called' after 2000ms }, 1000); `

Hints:

• Use setTimeout to delay the invocation of fn.
• Clear the timeout if the debounced function is called again before the delay has elapsed.

Solution: `javascript function debounce(fn, wait) { let timeoutId = null;

return function(...args) { clearTimeout(timeoutId); timeoutId = setTimeout(() => { fn.apply(this, args); }, wait); }; } `

Search Results

GitHub:

• Debounce Function Implementation: A similar debounce function implementation in JavaScript.

1point3acres:

• Debounce Function Interview Question: A discussion on implementing a debounce function in JavaScript.

PracHub:

• Debounce Function Exercise: An exercise to practice implementing a debounce function.

Glassdoor:

• Apple Interview Question: A mention of the debounce function interview question at Apple.

Blind:

• Debounce Function Discussion: A discussion on the debounce function and its implementation.

Conclusion

The full problem statement for the "Coding - Write a Debounce Function" interview question at Apple has been provided, along with examples, constraints, hints, and a solution. The search results from various platforms confirm the details and provide additional resources for practice and understanding.