Monthly Archives: January 2016

Why Do We Use Django For Python

3fDjango can be defined as a high-level Python Framework that helps the users to come up with faster as well as cleaner development along with some realistic designing of websites. Developers today prefer to use Django over Ruby on Rails due to certain reasons. They are described below:

Language

Python is extremely articulated as a language. You will find definite guidelines along with instructions, particularly about the way the codes are to be written or formatted. Besides, you will also find a clean structure in the codes, irrespective of whatever you do. In fact, the framework follows the good old principle that says, “Codes are more read than they are written.”

Presence of 3rd party Libraries

When it comes to 3rd party libraries, using Python will not pose any problem for the developer. The libraries are powerful as well as mature enough to make coding seamless as well as fast as well as free of hiccups.

Helper Tools

It comes up with some helper tools that will make the life of the developers much easier. These tools help you maintain as well as deploy the codes.

In other words, one framework is used over another because of the advantages it is offering. From that point of view, Django scores over Ruby in a number of aspects.

In fact Django is the framework for those who are perfectionists, particularly those, who tend to work with strict deadlines. With a string of value added features like helpers, working ORM, a fantastic admin interface as well as a few more, Django is a developer’s dream framework.

Object-Relational Mapper

It comes up with a default implementation mechanism that helps the developers when it comes to writing databases as Python class and query the same databases by using Python. This means that there is no need to write even a single SQL line manually.

Admin Interface

When it comes to taking care of a specific website or a client, it is imperative to manage all the content in a competent and flawless way. However, that does not mean that the codes and other texts need to be written in order to save time. It saves a lot of time as well as work. Django does exactly that.

It is a good tool and a well built one as well and this makes quite a difference at the end of the day.

Guarantee the longevity of the site

This is another cool factor that will speak for Django. The framework helps the sites to enjoy longevity. It means the site will not go down easily. That it ensures better life expectancy of the site is one of the major reasons why sites today are made up more with Django than anything else.

It is fast

Each and every bit of this framework is designed keeping in mind the speed factor. The template language of Django is much faster. The speed is so fast that even the caching compiled templates appears slower than when it comes to re-rendering them upon each and every request.

Django Scales

Whatever you do – right from launching and running personal websites that run on shared hosting to the small band websites and the huge databases of public information to the social networking sites, Django is ultimate when it comes to handling all the data successfully. Hence, the Django development framework features some astounding scalability that makes a difference. On top of everything, the budget involved is truly realistic as well as manageable.

 

Best Practices in Web Application Testing

weWith more and more users accessing websites on their smartphones, tablets and phablets, it has become essential for businesses to optimize their web applications for mobile devices. At the same time, each business needs to test the web application thoroughly to ensure that it delivers richer user experience across many browsers and under various conditions. While testing modern web applications, QA professionals have to address challenges related to integration, interoperability, performance, usability and security. So the QA professionals must follow simple best practices to test the web applications more effectively.

7 Best Practices for Web Application Testing

1) Focus on Cross-Browser Compatibility Testing

Nowadays most businesses opt for responsive web design to make their web applications deliver richer user experience on each device. The new approach requires programmers to make websites responsive by using open web technologies like HTML5, CSS3, and JavaScript. At present, older versions of certain web browsers do not support HTML5 fully. So the testers need to check how the app performs on both older and current versions of major web browsers. They can even use specialized automation tools to test the application across many browsers quickly and efficiently.

2) Test Each Important Element of a Web Application

While testing a web application, QA professionals often focus on its features, functionality and performance. But a business must ask the testers to assess each important element of the website in addition to its functionality and performance. For instance, the QA professionals must assess key elements of the web application including cookies, CSS, JavaScript, HTML validity, dead-links, browser refresh, windows resizing, and security. The comprehensive testing will make the website deliver richer user experience over a longer period of time.

3) Assess the Application’s Performance under Various Conditions

In addition to assessing the stability of the website’s functionality, the testers also need to ensure that it does not crash under heavy load. Sometimes minor flaws in its design or code also affect the website’s performance negatively. So the testers must assess the performance of the application under a variety of loads to check how it caters to a large number of visitors. They can even use open source load testing tools to assess the performance of the application under varying load on the server effectively. Likewise, they must perform load testing repeatedly to ensure that the performance of the website is not impacted by the changes made to the code.

4) Scale the Load Tests Incrementally

In addition to assessing the performance of the website under varying loads, it is also important for the QA professionals to scale the load tests incrementally. In the initial stages, they should replicate a comparatively smaller number of distribute user, and increase the number of users gradually. When the number of users increases gradually, it becomes easier for software testers to identify the exact point where the application crashes. However, the QA professional must perform load tests in cycles and analyze the load testing result of each cycle to assess the performance of the website accurately.

5) Don’t Forget to Check HTTP Traffic

While testing a web application, businesses often forget the significance of analyzing the web traffic. When the testers check the HTTP traffic thoroughly from the browsers to the server, it becomes easier for them to assess each request and response precisely. At the same time, the HTTP traffic analysis helps them to test Google Analytics tags and similar third-party tracking tags used by the web page. The testers can further use specialized tools to ensure that each tracking tag includes correct values, and the third-party systems respond to the user requests quickly and properly.

6) Test the Web Services Independently

Nowadays most web applications use a variety of web services. But the business needs to ensure that the web services used by the application are tested independently, and as isolated components. The testers must test the web services before they are integrated with the application. The option will enable them to test the web services more quickly, while exercising better control over their functionality. Also, the testers can send a variety of request to the web browser directly and assess its performance without using a web browser.

7) Pick the Right Parameters for Usability Testing

The business must focus on both usability and user-experience of the web applications to keep the visitors engaged and convert them into customers. However, it is also important for the testers to assess the usability of the applications based on the most appropriate parameters. The business must clearly define the key criterions for performing usability testing. At the same time, the business also needs to pick a number of key criterions like user interface design, speed, performance, readability of content, accessibility and navigability. Likewise, it must ask the testers to determine the amount of time required by a user to perform specific tasks.

A business can always automate its testing efforts to quickly check the look, feel, usability and performance of the web application across many web browsers. However, it also needs to focus on development, maintenance and reusability of automated tests to test the frequently changing front-end of the web application more effectively.

 

Importance of Back-End Web Development

4gWhile creating a new website, developers have to focus on both frontend and backend development. The frontend of an application refers to the code that is visible to the website visitors. Normally, frontend code creates interfaces through which the application interacts with the users. On the other hand, the backend code interacts with the server, and delivers content or data to be displayed to the users. So the backend code deals with the application as well as the web server and database. The combination of application, server and database makes the backend coding both complex and important.

Why Developers Must Pay More Attention to Backend Web Development?

Facilitates Information Exchange

As noted earlier, backend consists of three key elements of a website, i.e., application, web server and database. While accessing the user interface of a website, each user is required to provide his login id and password. The login id and password provided by the user is validated by the backend. Likewise, any information submitted by the user is stored in the databases through the backend code. Also, the backend retrieves information from the database, and sends the information to the user interface for displaying to the user. Hence, the backend of a website acts as its structure and facilitate information exchange.

Runs in Various Environments

Nowadays, businesses deploy websites and web applications in a number of environments. For instance, some enterprises prefer running websites on web servers, while others deploy web applications in the cloud. At the same time, many businesses even combine both hosting options to avail benefits like enhanced performance and scalability. The web server setup varies from one network to another. Also, the programmers often distribute server-side workload over multiple machines. The varying hosting environments make it essential for developers to customize the backend of websites.

Contains the Application Logic

Most programmers nowadays keep the user interface and application logic of a website separate to simplify its development and maintenance. In addition to including the domain and infrastructure components of an application, the application logic also performs the routine data processing required by each business. The backend of a website contains its application logic. Hence, the developers must focus on backend web development to switch from one frontend to another seamlessly, and make multiple user interfaces access the same application logic.

Adds Utility to Each Frontend Functionality

While developing a website, programmers are required to write backend code to add utility to each frontend functionality. For instance, they have to write code using a server-side programming language to add functionality to a user login form. Each time a user enters his login credentials, the backend code will collect the values, and compare them with the login data stored in databases. Likewise, backend code also adds functionality to various forms, profiles and accounts. Hence, no website can function without quality backend code.

Impacts the Website’s User Experience

The usability and user experience of a website impacts its popularity in the longer run. As noted earlier, all tasks required to make a website function are performed at the backend. So the user experience delivered by a website will be impacted by the quality of backend code. Any issues in the backend code can result in frequent website crashes, running the website slowly, and similar performance issues. At the same time, minor defects in the backend code can make the website vulnerable to targeted malware and security attacks. It is important for the developers to focus on the quality and structure of the backend code to make the website deliver richer user experience without any interruptions.

The Beginner’s Guide to Choosing the Right FPGA Board

3rNew to FPGA boards and not sure where to start? The technology world can be a confusing place for beginners and pros alike, and it certainly doesn’t help when everything has an acronym. For instance, learning that FPGA actually stands for Field-Programmable Gate Array is just the first step in acquiring enough knowledge to feel comfortable in choosing the right FPGA Board for your needs. When it comes to integrated circuits, though, there is some basic information that can steer you in the correct direction, simplifying your search.

FPGA Board- What is it?

A field-programmable gate array is simply a customizable group of electronic circuits, like transistors, resistors, and inductors, usually on a silicon board. These electronic circuits allow electric currents to flow through the mechanisms. Oftentimes, these integrated circuits are pre-programmed and the user purchases a specific type of integrated circuit for his purpose. Many other fields and users require a customizable board, in order to meet a specific need. An FPGA Board allows a user to program the circuit after the board has been manufactured.

How can these boards be programmed after manufacturing?

The configurable logic block is the beginning point for any FPGA Board. The logic block uses Boolean functions to create logic gates. Diodes and transistors most commonly comprise the logic gates. Engineers use wires to configure the logic blocks, and in a customizable board, the routing is engineered to the specific use of the Board. The user Application circuits must be created with the correct resources to have a functioning FPGA Board.

In other words, Field-Programmable Group Arrays create specific applications. Different applications require different amounts of logic blocks. Common applications for FPGA Boards include military uses like missiles and munitions, and aerospace defense; medical uses, industrial imaging, and security functions. Nearly every industry requires the use of a programmable board at some level.

Knowing how to choose the FPGA board for your use.

It can be tricky trying to determine which Board suits your particular needs. There are FPGA Boards that can be reprogrammed as your purpose and need for the Board evolve and change. Other boards are classified as OTPs, or One Time Programmable boards. These circuits require the user to program the board just once. The circuitry will not change once the Board has been programmed. If your use requires the ability to reprogram, consider whether you will require the function of remote programmability. This is an option as well.

The advantages to choosing a Field Programmable Group Array generally include a shorter time to market and lower non-recurring engineering costs. As stated earlier, the ability to make repairs and reprogram the Board is helpful for those who work in the field and need to adapt the application. FPGAs have also been known to work especially well for vertical applications.

A user needs to be able to use a hardware description language, known as an HDL. There are several appropriate HDLs for users to choose between, but the languages are largely dependent upon the function of the Board. The language, among other choices in programming a board, can be confusing for a beginner or for someone new to FPGAs. Finding a great company to help configure the FPGA to suit your needs is crucial to the process.

Six Essentials For Building Cross Platform Apps

adDeveloping cross platform apps that address all platform specific features and design attributes is a Herculean task. It requires experience along with technical knowledge. The developer has to acknowledge that every platform is unique and requires peculiar attributes for proper functioning of apps. It is a challenge to build apps that work seamlessly and provide a great user experience. In order to do the same a cross platform app must provide a combination of device specific features along with native capacity on each platform. The catch is to strike a balance between core consistency and native capability along with a high degree of platform independence and responsiveness.

1. Looks matter: The look and feel of the app should coincide with the platform it is supposed to work on. It is important to retain the identity of the brand and make the aesthetically pleasing to the eyes. The basic platform should be made independent that delivers core aesthetics for all platforms. Upon that brand focused design elements should be added and integrate to other platform specific elements. This is the key to maintaining design consistency and diversity. To achieve this end, high-performance tools like Appcelerator may be used.

2. Platform specific coding for UI and UX: Reusing code while developing cross platform apps is useful in the sense that it helps maintaining the core app logic but does not help in tweaking the user interface for each platform or maintaining separate user experience for all. Therefore the coding should be original except reusing the code in the core area. Cross platform development tools maybe used as far as core app logic, content and functionalities are concerned but not for platform independent UI/UX elements. A high degree of uniqueness has to be maintained while coding to create brilliant UI and UX.

3. Take a cue from platform independent web service: The most common mistake that most developers make is to get attached to a particular platform mostly the one that the app is being tested upon. This is a blunder in cross platform app development. It causes obstructions in decoupling the app logic from the platform it has been attached to. Therefore, it is a smart idea to build apps like platform independent web service. Just like a web development service, the UI should be segregated from the core app logic. It is advisable to take help from frameworks and modules offering help regarding the same.

4. For each platform, a unique UI attribute should be provided: It is advisable to deliver a unique set of look, feel and usability for each platform since each mobile platform has a set of its own requirements and guidelines. There is an array of platform specific differences and it is important for the developer to address them appropriately. If the developer has a personal user experience with similar apps, it may help him develop better designs and address the differences in a better way.

5. Take help from tested API modules: The use of API modules not only reduces development time but also provide robust exposure to all native SDKs of various platforms. These native SDKs are helpful as the development progresses. App development modules contains native develop frameworks making development faster, easier, flexible and value added. The best third party app development modules contain a wholesome cross platform frameworks and tool sets to create the best user experience in a particular platform.

6. Test, re-test, repeat: Last but not the least, the final appearance and functioning of the app is not just important but essential for the app for the app to perform effectively and appeal to the users. Repeated testing on all platforms surfaces the glitches and loopholes and help improving upon optimizing the design and functioning. Frequent and exclusive testing on all platforms helps addressing issues in a focused way and makes the developer more confident of the app performance. It is always better to be safe than sorry and therefore testing at the initial stage shows the faults at the initial level and prevents the surfacing of the same at later stages where it could prove to be counterproductive. It saves time wince testing at later stages is a lot more hassle than doing the same in the beginning.