Find a person from a phone number

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Even if your question is urgent, next time, please reflect a little longer on the question title. I've attempted to rephrase it for you so that it's a little more specific than just "Help! Data structure! Kent Kent k 28 28 gold badges silver badges bronze badges.

Thank you. I understand the solution. What if we have to store phone numbers of two different persons with same name?

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Sandeep According to the specification, that wouldn't be possible. If you have a phonebook containing two "John Doe", one with phone number and one with phone number , and I asked you to give me the phone number of John Doe, what would you do? Well the only thing you could do would be to give me both numbers. Corresponding to a hashmap which maps each name to a list of phone numbers.

Ideally, however, you'd want something unique as the key. Maybe, if the information is available, the social security number could be used as the key in the hash map instead.

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Suitable data structure for finding a person's phone number, given their name? - Stack Overflow

Yavar Yavar Wow you guys are good : My first question here. I really liked your explanation Yavar. It is a classic example of collective intellligence at work. Be a part of it. A dictionary is both dynamic and fast. Avi Cohen Avi Cohen 1, 1 1 gold badge 15 15 silver badges 23 23 bronze badges. Topo Topo 2, 7 7 gold badges 29 29 silver badges 56 56 bronze badges. Why not use a singly linked list?

Each node will have the name, number and link information. Your postscript requires a doubly-linked list; however you are proposing a singly-linked list which btw.


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I would not recommend for this problem because of the linear search time issue that you mention. Forgot to mention about the doubly linked list there. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name.


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  • There are also apps that specialize in uncovering hidden caller IDs. TheTruthSpy is a simple and easy-to-use tracking app. It is available for both iOS and Android smartphones and it comes with a hour free trial. If you want to track and locate your kids, the app allows you to track their calls, messages, as well as their Viber, WhatsApp, and other social media accounts. If you need to track down a person, you can use Spyzie.

    Step 1: Ask for their number

    Spyzie can monitor app info, media files, contacts, text messages, calls, internet use, and other things. Spyzie also lets you monitor the SIM card changes on the target phone.

    How do you find a person's name by their cell phone number?

    Additionally, if you lose your phone, you can protect your data with the remote locking feature.