Facebook & Amazon's SINGLE NUMBER | LeetCode | [step - by - step 2 Solutions] JAVASCRIPT

#singlenumber #programming #algobyte #interviewquestion #javascript #leetcode

Single Number is among tech interview questions, it appears in Facebook, Amazon, Google, Adobe, Microsoft & Bloomberg's tech interviews. It is a fun problem to solve both for beginners & experinced programmers as it can be solved in multiple ways.

Problem Description: Given a non-empty array of integers nums, every element appears twice except for one. Find that single one.

Follow up: Could you implement a solution with a linear runtime complexity and without using extra memory?

Example 1:
Input: nums = [2,2,1]
Output: 1

SPACE - TIME COMPLEXITY ANALYSIS:
Sub-Optimal Approach using HashSet (Time O ( n ) Space O ( n ))
Optimal Approach using Bit Manipulation (Time O ( n ) Space O ( 1 ))

Related Topics: Array, HashMap (or HashSet), BIT MANIPULATION

[neya]

a fantastic job has been done! subscribed and left a like.

[davithakobyan]

Thank you for video. You explained in great detail

[joseba]

This has been the best and easiest explanation ever! You should post the link to this video on the leetcode boards.

[zeckey]

Great solution but I have a question. Can we solve this problem with setting a new array insted of new Set() ? Using array.includes method and push, pop methods ? Thank you!