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Data Structures for Coding Interviews in JavaScript

Solution: Find Two Numbers That Add up to k—Hashing

Explore how to find two numbers in an array that add up to a target value using hashing methods in JavaScript. Understand the use of dictionaries and sets for efficient lookups, and learn to analyze the time and space complexity of these solutions to improve coding interview skills.

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Statement

Given an array of integers nums and an integer target, k, find two numbers in the array that sum up to the target k.

There is exactly one solution for each input, and each element of the array can only be used once in the solution. The order of the returned elements does not matter.

Constraints:

  • 2≤2 \leq nums.length ≤103\leq10^3

  • −105≤-10^5\leq ...