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Grokking the Coding Interview Patterns in JavaScript

Solution: Single Number

Explore how to solve the problem of finding the unique single number in an array where every other number appears twice by using bitwise XOR manipulation. This lesson helps you apply XOR properties to achieve a solution with linear time complexity and constant space usage, strengthening your problem-solving skills for coding interviews.

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Statement

Given an array of integers, where every element appears twice except for one, find the element that occurs only once.

Note: The solution must have linear runtime and constant space complexity.

Constraints:

  • 1≤1 \leq nums.length ≤103\leq 10^3
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