Manoj's Blog

Just kidding... Have you ever come across this message when you try to access a certain web page? Ever wondered what 404 stands for? In this mini blog we are going to look at some widely used status codes in HTTP. Types of HTTP Status codes 1xx : Informational Status code. These codes keeps the client informed of basic headers. 2xx : These codes reflect a successful response or operation 3xx : Redirection codes 4xx : Client Error codes (404) 5xx : Server Error codes Now, we'll look at some commonly used status codes. 2xx 200 - OK Standard response for successful HTTP requests. The actual response will depend on the request method used. In a GET request, the response will contain an entity corresponding to the requested resource.  201 - Creat This status code is sent as a response when the request was a POST method. If the POST request was successfully sent and processed, we get a 201 status code. 204 - No Content The request was successful...

What is Node.js? Node.js is a free and open source server environment. That is, Node.js brings JavaScript to the server and guess what it is platform independent. Node.js lets developers use JavaScript to write command line tools and for server-side scripting to produce dynamic web page content before the page is sent to the user's web browser. Consequently, Node.js represents a "JavaScript everywhere"  unifying web application development around a single programming language, rather than different languages for server and client. Node.js was implemented by Rian Dahl in 2009 and combines the following, Google Chrome's V8 engine An event loop Package management (npm) Chrome V8 Engine This compiles JavaScript directly to native machine code before executing it, instead of more traditional techniques such as interpreting bytecode or compiling the whole program to machine code and executing it from a filesystem. The compiled code is additionally optimized...

RE presentational S tate T ransfer! What is REST? (REST API) Let’s say you’re trying to find videos about Avengers on Youtube. You open up Youtube, type “ Avengers  ” into a search field, hit enter, and you see a list of videos about  Avengers . A REST API works in a similar way. You search for something, and you get a list of results back from the service you’re requesting from. Wait... What is an API? API stands for Application Programming Interface which will have a set of rules that allows the programs to talk to each other over a protocol. The developer creates the API on the server (host)  API One of the rules in REST states that the user should be able to get a piece of data, which is called resource, when linked to a specific URL. When doing this, certain security filtering may done when user tries to get to the resource through that URL. For example, application might filter only logged in users to view certain resources. Each lin...

Why NoSQL over SQL? Unlike the developers in the past, developers and development teams are now creating applications that create dynamic data types which are massive and unpredictable in structure. i.e They may be structured, semi-structured, unstructured or can be polymorphic. The Waterfall development life cycle is hardly practiced these days and nowadays even small teams work according to agile methodologies and agile sprints making the agile method more popular. In such a case, code is pushed very frequently. The applications developed through such methods are no longer created to cater the needs of a fixed number of users, instead they're developed as services which should be always available at the request of millions of users and should be readily available at different locations. Also, organizations are now scaling out their architectures and use FOSS (Free and Open Source Software), cloud services instead of maintaining large storage infrastructure. The traditio...

Libraries vs Frameworks A  library  is essentially a set of functions that is called by the code, which are organized into classes. Each call to a library does some specified set of operations. A  framework  possesses some high-level design, with more built-in functions and behaviors. In order to use it you need to insert your own behavior into various places in the framework either by subclassing or by plugging in your own classes. The framework's code then calls your code at these points. Ok now, JS! Every day a new  JavaScript library is born! A few years ago, JavaScript (hereafter referred to as JS) was used for web-based front end development. Now, it is not only a front-end development platform, instead, it has numerous dimensions such as back-end development, database language, IoT capable language etc. etc. In addition, like all the other programming languages, frameworks are very common and popular in JS. But, in addition to that, n...