Impress Interviewer - Find Needle In a Haystack JS Problem
Crack the “Find the Needle in a Haystack” substring search in JavaScript in 4:30. We restate the task in plain English, set up clear examples, then build two solutions step by step: a beginner scan and an optimized pointer-based scan (no extra memory). You’ll get line-by-line coding, console checks, Big-O, edge cases, and a simple interview talk-track — perfect for software engineer and SDET/QA prep.
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Timestamps:
0:00 — What’s the challenge we’re solving?
0:20 — Which edge cases actually matter?
0:40 — What example inputs will we test?
0:55 — How does the beginner scan work, and can we code it?
1:50 — How does the optimized two-pointer scan work, and can we code it?
3:20 — What do the console runs show, and what are Big-O and pitfalls?
4:15 — What should you practice next?
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