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Ruby on Rails – Error installing mysql2: Failed to build gem native extension – Ubuntu Linux

      This is a very common issue where we get error “Error installing mysql2: Failed to build gem native extension” while installing mysql2 gem in Rails(in Ubuntu Linux OS). The problem is due to missing libmysql(from MYSQL) file. Linux Solution:       To solve the issue install the compnents libmysql-ruby and libmysqlclient-dev using the… Read More »

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NFC Ring – Unlock smartphones, door locks and transfer information

      Smartphones are making our way easy to go. Most of the people use smartphone particularity for communication. It doesn’t matter whether we  call, message, transfer media content, photos or any other. The communication happens through radio signals. Bluetooth technology is one of the technology which lead way to next generation communication standard NFC(Near Field Communication). What is NFC? It is a set… Read More »

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Ouya – $100 Budget Gaming Console from OUYA Inc

         Digital Gaming is there all over the world.  PC and Console gaming cost you a lot. Say we need to invest atleast 400$ for PC gaming and 200$ for consoles like Xbox 360. It pretty costly for casual gamer  So here we have a budget Anrdoid OS based console for $99.99… Read More »

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Linked List in C- Insert Node at Start of the Linked List

DATA STRUCTURES IN C – LINKED LIST (20 PROGRAMS) Try DATA STRUCTURES IN C – LINKED LIST (20 PROGRAMS) Linked List in C- Insert Node at Start of the Linked List :            Linked List is a data structure which is used to store and retrieve data. Consider the following image.  … Read More »

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Execute Multiple Search Query in Elasticsearch

           The following query can be used to execute multiple search queries on the required index and type. Elasticsearch will process the request and the response is sent as array field named responses which contains the response for each query.  Note : { “index”: “INDEX_NAME_1”, “type”: “TYPE_NAME_1” } in Example 1… Read More »

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