My Blog

Author: saqibkhan

  • If Node.js is single-threaded, then how does it handle concurrency?

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    The Multi-Threaded Request/Response Stateless Model is not followed by the Node JS Platform, and it adheres to the Single-Threaded Event Loop Model. The Node JS Processing paradigm is heavily influenced by the JavaScript Event-based model and the JavaScript callback system. As a result, Node.js can easily manage more concurrent client requests. The event loop is…

  • Why is Node.js Single-threaded?

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    Node.js is single-threaded for async processing. By doing async processing on a single-thread under typical web loads, more performance and scalability can be achieved instead of the typical thread-based implementation.

  • How does Node.js work?

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    A web server using Node.js typically has a workflow that is quite similar to the diagram illustrated below. Let’s explore this flow of operations in detail. A single thread from the Thread Pool is assigned to a single complex request. This thread is responsible for completing a particular blocking request by accessing external resources, such…

  • Why use Node.js?

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    Node.js makes building scalable network programs easy. Some of its advantages include:

  • What is Node.js? Where can you use it?

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    Node.js is an open-source, cross-platform JavaScript runtime environment and library to run web applications outside the client’s browser. It is used to create server-side web applications. Node.js is perfect for data-intensive applications as it uses an asynchronous, event-driven model. You can use  I/O intensive web applications like video streaming sites. You can also use it for developing: Real-time…

  • Overview

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    C++ is a statically typed, compiled, general-purpose, case-sensitive, free-form programming language that supports procedural, object-oriented, and generic programming. C++ is regarded as a middle-level language, as it comprises a combination of both high-level and low-level language features. C++ was developed by Bjarne Stroustrup starting in 1979 at Bell Labs in Murray Hill, New Jersey, as an enhancement…

  • Ajax

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    Ajax essentially is a combination of technologies that are integrated together to reduce the number of page loads. We generally use Ajax to ease end-user experience. Using Ajax in Django can be done by directly using an Ajax library like JQuery or others. Let’s say you want to use JQuery, then you need to download…

  • RSS

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    Django comes with a syndication feed generating framework. With it you can create RSS or Atom feeds just by subclassing django.contrib.syndication.views.Feed class. Let’s create a feed for the latest comments done on the app (Also see Django – Comments Framework chapter). For this, let’s create a myapp/feeds.py and define our feed (You can put your feeds…

  • Comments

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    Before starting, note that the Django Comments framework is deprecated, since the 1.5 version. Now you can use external feature for doing so, but if you still want to use it, it’s still included in version 1.6 and 1.7. Starting version 1.8 it’s absent but you can still get the code on a different GitHub…

  • Caching

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    To cache something is to save the result of an expensive calculation, so that you don’t perform it the next time you need it. Following is a pseudo code that explains how caching works − Django comes with its own caching system that lets you save your dynamic pages, to avoid calculating them again when…