First Non Repeating Integer in an Array | Java Interview question |#codinginterviewquestions

Given an array, find the first integer, which is unique in the array. Unique means the number does not repeat and appears only once in the whole array.

Timestamps:
00:00 Problem statement
01:10 Approach #1: BruteForce approach
06:45 Approach #2: HashMap Solution(Best)

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