Is Infinite Method Object easy or hard?

Infinite Method Object is classified as Easy with a very high acceptance rate around 92%. The challenge mainly tests familiarity with JavaScript Proxy behavior rather than algorithmic complexity.

Infinite Method Object Python/Java solution

The official problem targets JavaScript or TypeScript because it relies on the Proxy API. Languages like Python or Java do not provide an identical runtime proxy for property access, so the direct solution is specific to JavaScript environments.

How to solve Infinite Method Object in O(1)?

Create a Proxy object and implement the get handler. When any property is accessed, return a function that returns the property name string. Since the handler performs a constant amount of work and stores no additional data, both time and space complexity remain O(1).

What is the best approach for Infinite Method Object?

The optimal approach uses a JavaScript Proxy with a get trap. Every property access dynamically returns a function that captures the method name and returns it when invoked. This satisfies the requirement of supporting unlimited method names while keeping time and space complexity O(1).

Is Infinite Method Object asked at Google/Amazon/Meta?

This problem is part of the JavaScript-focused LeetCode questions commonly used to evaluate understanding of proxies, objects, and meta-programming. Similar dynamic object design questions appear in frontend and full‑stack interviews at large tech companies.

What data structure is used in Infinite Method Object?

The core mechanism is the JavaScript Proxy object. It intercepts property access on an object and dynamically returns a function for any method name, enabling the object to behave as if it has infinitely many methods.

What is the time complexity of Infinite Method Object?

The Proxy-based solution runs in O(1) time for each method access and invocation. Property lookup triggers the proxy handler, which immediately returns a small function without performing iteration or additional computation.

Description Hints 3 Solution Video 4:02

2690. Infinite Method Object

Easy92.3% acceptancePremium elsewhere, free here

Write a function that returns an infinite-method object.

An infinite-method object is defined as an object that allows you to call any method and it will always return the name of the method.

For example, if you execute obj.abc123(), it will return "abc123".

Example 1:

Input: method = "abc123"
Output: "abc123"
Explanation:
const obj = createInfiniteObject();
obj['abc123'](); // "abc123"
The returned string should always match the method name.

Example 2:

Input: method = ".-qw73n|^2It"
Output: ".-qw73n|^2It"
Explanation: The returned string should always match the method name.

Constraints:

0 <= method.length <= 1000

Hints open one at a time

Hint 1

Javascript has the concept of Proxy. That concept is critical to this problem.

Hint 2

Override all "get" for the object. Return a function instead.

Hint 3

That function should return the "prop", i.e. the method name.

4:02

Still stuck?Read the written solution, or watch a walkthrough.

Open solution

2690. Infinite Method Object

Hints open one at a time

Similar problems