---
title: "Discussion on \"Map and Set in JavaScript: The Smarter Way to Store Data\" | Hashnode"
description: "Discussion on \"Map and Set in JavaScript: The Smarter Way to Store Data\". Okay so picture this.\nYou're building a phone contacts app. Every contact has a unique phone number, and you need to pull up their name super fast when a call comes in. You also want to keep a list of"
url: "https://hashnode.com/posts/map-and-set-in-javascript-the-smarter-way-to-store-data/6a72ce5bf1bfa7924baaabdc"
---

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# [Map and Set in JavaScript: The Smarter Way to Store Data](https://blogwithmangesh.hashnode.dev/map-and-set-in-javascript-the-smarter-way-to-store-data?utm_source=hashnode&utm_medium=feed)

Okay so picture this. You're building a phone contacts app. Every contact has a unique phone number, and you need to pull up their name super fast when a call comes in. You also want to keep a list of

Aug 5 · 13 min read · blogwithmangesh.hashnode.dev  
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[Mangesh Jadhav](https://hashnode.com/@codewithmangesh)

@codewithmangesh · katraj , kondhwa , pune

  
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