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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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Custom Elasticsearch Index Name/Type Name based on Events in Logstash

     The article details on how to use custom Index/Type name when using Logstash for proessing logs and Elasticsearch as Output. input { file { } } filter { grok { pattern => "%{NUMBER:attribute1} %{GREEDYDATA:attribute2}" } ruby { code => ' event["custom_index_name"] = event["attribute1"] event["custom_type_name"] = event["attribute2"] ' #You can also set an field… Read More »

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Linked List in C – Detect/Find Loop

DATA STRUCTURES IN C – LINKED LIST (20 PROGRAMS) Try DATA STRUCTURES IN C – LINKED LIST (20 PROGRAMS) Linked List in C – Detect/Find Loop :            We use two pointers current and previous Pseudo Code: 1. Current pointer initially points to first node(head) of the linked list 2. Previous node… Read More »

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Elasticsearch – Apply Nested Filter on Nested (Inner) Aggregation

           The following query can be used to apply filter on nested (inner) aggregation. In our example aggregationName2 is the nested aggregation. The filter (bold content) in the input JSON will be applied only for the aggregation aggregationName2. aggregationName2 takes in the output of aggregationName1, then applies the filter which is then processed by aggregationName2… Read More »

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Leap Motion – A Gester Based Motion Sensing Controller for Desktops and Laptops

               Remember the movie Iron Man where Robert Downey Jr. (Tony Stark / Iron Man) uses his hands to control the computers and huge displays. Have you ever thought of having such technology with you? Here it comes, Leap Motion – a touch free motion sensing controller where you… Read More »

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