All About Coding and Programming

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Essential facts for Learning JavaScript In 2018

When it comes to learning a computing language, the very first thing to understand is how programming actually works. Among other options, it is impossible to overlook JavaScript’s latest influences in the tech industry. As the demand for JS is increasing, the decision to learn it escalates. There are also most of the developers who consider learning JavaScript a burden and give more focus on implementing its frameworks. It is amazing as it provides the users a ready-to-use code which can be easily read and debugged. Due to this effortless strategy, all beginners in the programming field do not get a strong foundation. It is something that is keeping developers and programmers behind in this competitive world.

Reasons that make JavaScript the most popular programming language -

1. It Is Easy To Use

JavaScript is the only programming language which can be executed in both front-end and back-end. A programmer is available to work on numerous server-side platforms. It’s good to learn a little bit about all these platforms.

2. It Build Better Sites

While HTML and CSS, both are good mediums for building web pages, they don’t make an interactive site. In order to overcome this drawback, JavaScript has a magical power to make the site alive.

3. It Is Compiled Language

This programming language is completely compiled as it is possible for it to run the applications faster. Even, there is no need to recompile the file over again the code is loaded into the memory.

4. It Has Tons of Jobs

As compared with other programming platforms, the demand for JavaScript is on increasing. By learning this language, one can expect high pay and tons of job growth.

With these reasons, JavaScript has become the most popular language of all time. For every front-end developer, it is still worth to learn new concepts of JavaScript.

Is it worth to still learn JavaScript in 2018?

Of course, as more and more people are now interacting by websites, the demand of JavaScript developers is also on the rising point. JavaScript is not only helpful in making the website responsive to the users but also a big stage for building cross-platform applications. Here are few practical ways a developer can use JavaScript for good use:

·         JavaScript can be used for adding funny animations which deliver a professional look to sites.

·         A developer can create interactive forms which are helpful in detecting the wrong entry filled by the user.

·         The search box implemented with JavaScript easily responds to user queries.

·         One can move around different HTML elements and drag them wherever they want.

Conclusion

JavaScript is the most important technology which needs to be refreshed in every mind this year. Only its new concepts can help the developers to make the web more recognizable by the audience. Leaning code is not enough, one needs to be aware of all the possibilities related to it. For this year, it’s ideal to start by creating amazing web games, apps, and interactive websites. If you need some back support to become fluent in executing all complex codes, you can visit CodeFights. It is a platform that not only helps you in enhancing your coding skills but also let you prepare well for the technical interviews.

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Detailed Explanation on Angular's NgIf, Else, Then

AngularJS is a complete client-side solution for building dynamic web pages. It is open-source JavaScript framework which can be freely used or shared by anyone. With this outline, one can now extend HTML with the new attributes called directives. For any AngularJS application, directives are considered as the most important components. Although there are huge built-in directives to deliver functionality to applications, one can also create application-specific directives. Here are a few Angular directives and their use in an Angular application –

NgIf - NgIf is that Angular directive which is used to add or eliminate the host element in DOM layout during the execution. Basically, NgIf runs with either true or false value as per the expression. In simple words, when the condition is true, elements will be added to DOM unless they all removed.

The directive NgIf can be used in multiple ways. On placing NgIf on an element, it recreates the elements during the compiled state and due to which the added class will be lost. Once the expression evaluated, Angular is used to add or eliminate the DOM nodes, mount or remount the components from DOM. The syntax of NgIf directive is simple, prefixing the directive with (*) and add it anywhere inside the template.

*NgIf and Else - Basically, the Else statement is used to display some false values. It is an amazing and easy-to-use addition to the AngularJS. If/else is useful in managing the messy templates or mount/unmount the components as well. When <ng-template> use the Else block, NgIf directive uses the reference variable to display the block when the condition is false.  

*NgIf with Then and Else - Using “then” along with NgIf is simply used to move the initial *NgIf template outside the element. It is completely flexible to use in the cases where we want to dynamically change the template to then-. One can also adopt this approach to create more descriptive if/then/else block. By using the “then” block, all the content between the opening and closing tags of the bound element is ignored.

NgIf with “then” & “Else” can be used with the <ng-template> where the “then” is inline of the NgIf. As the result, when a condition is true, then <ng-template> with “then” block is executed. On the other side, when it is false, the <ng-template> with “Else” block is executed. One can also change the values for both “then” and “else” block at runtime. Only at one time, either the <ng-template> with “Then” or “Else” will run.

Angular JS directives are the most powerful components when used with HTML elements to create reusable code. In order to understand the coding in a better way, you can visit CodeFights Today. This platform helps you in solving all complex codes and prepare for technical interviews.

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What’s new in NativeScript?

A NativeScript is a framework that turns TypeScript, JavaScript and Angular into native mobile apps adding starter templates. It not only streamlines the process of development but also contribute in the enhancement of the platform with the help of templates. 

Templates contribute to be a significant part of the NativeScript and a client companion of GUI   to interface with the NativeScript command line. Sidekick was also introduced recently. It contains cloud buildups, plugins and debugging support accompanied with other templates. The developers, who offer NativeScript, also offer Sidekick for free. You can download them easily. It is mainly considered as progress software among developers.

The main use of NativeScript is to develop native mobile applications using JavaScript, Angular or Typescript, featuring mainly on the abstraction of cross platforms and runtime. NativeScript runtime interprets and translates JavaScript, TypeScript and Angular into respective requirement. It also translates the Google Android and iOS based native APIs giving the developers a wide window to write an application based on any platform.

There are many developments that are currently taking place in NativeScript platform. A list of few prominent enhancements is -

·         For reuse of source codes, NativeScript is trying to introduce sharing of codes between the mobile and web application. The good news is, 80% of the codes that are on the web, can be migrated to the mobile technology.

·         Vue.JS framework support provision is also planned similar to how NativeScript works for Angular.JS.

·         A sandbox browser for the experimenting on cross platform abstraction with NativeScript and other platforms like Angular, Vue.js, TypeScript or JavaScript is introduced.

·         Augment Reality is currently present for iOS 11. The aim is to develop an augment reality which is also suited for Android.

·         A new plugin marketplace for NativeScript applications is introduces for better quality and smooth functioning.

To practice these technologies visit one of the best platforms to enhance your knowledge, CodeFights. It is a one stop junction for all your programming and development query and practice. It not only helps you in enhancing your coding skills but also offers technical interview practice.

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5 Upright Websites to Learn JavaScript Online

Gone are the days when one faced dearth of study resources. With internet taking over the world one can find anything and everything. Education and knowledge is no more costly and reserved for the privileged. In that context if you want to learn JavaScript, numerous websites may offer you the ease of learning for free.  It just requires a good internet connection and a little dedication and you can master JavaScript.

One dilemma you may face is in case of selecting appropriate matter and content to refer and practice. To help you refer officially accurate material and follow genuine websites, given below is a list of top sites that can assist you in becoming master in JavaScript.

 Code Academy

This is a website that offers a platform to learn many technologies. But when searching for the best website to learn JavaScript online, this one tops the list. Code Academy currently offers Java, UNIX, GIT, and other courses but it came into limelight with its JavaScript technology.

CodeFights

It is a website best suited for you if you wish to practice for interviews. If you believe practice is the best way to learn, this website is for you. There are over 40 languages you can explore this site for best mock practices and coding solutions for your interviews. Codefights makes sure you write better code by giving tips and advice that are going to make you a better programmer for sure.

Code Combat

With help of JavaScript you can add new functionalities to your web page, but learning JavaScript on your own is intimidating. Code Combat helps to learn computer based technology while experiencing the actual environment. It has web development courses to learn basics of JavaScript.

Code Avengers

This website is good to learn programming. The Code Avengers provides online JavaScript lessons of diverse levels e.g. JavaScript-1 covers variables and loops, JavaScript-2 covers Arrays and Strings while extra progressive levels like JavaScript-3 will deal with Animations and GUIs.  

Code School

The jQuery tutorial on this website is amazing, but course like JavaScript are also worth referring. It is a good platform to learn JavaScript for free. It has many tutorials and different interactive means like badges and levels to keep you motivated.

These were a few of my observations. Hope this helps you in learning JavaScript well. All the best!

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Top AngularJS Interview Questions

AngularJS has grown out to be one of the most popular career opportunities. It is one of the top JavaScript framework choices and has decent speed and agility. If you are looking for means to fast-track your career, AngularJS might be the best option for you. To help you pace up, we have assembled a few critical and frequently asked interview questions related to AngularJS.

What are AngularJS directives?

Application specific HTML syntax is extended with the help of AngularJS directives, which are HTML attributes with `ng-` prefix, for example `ng-app`, `ng-init`, `ng-model`. There are different types of directives like element directives, attribute directives, CSS class directive and comment directives.

What are AngularJS Controllers?

Controllers are JavaScript objects that provide data and logic to HTML UI. The application controller is defined by the `ng-controller` directive. They control how data flows from the server to HTML UI.

What is the difference between AngularJS and Backbone.js?

AngularJS is a live templating engine while Backbone.js is designed to build only isolated blocks of HTML combined with some JavaScript code.

What is factory method in AngularJS?

A factory is a function that returns objects. It can additionally be used to execute some logic before the object is returned. Factory method will be invoked using `app.factory` where first argument is the service name and the second argument is the function returning the object.

Does Angular use jQuery?

Angular can use jQuery only when it is present in the application. If jQuery is not already integrated into your application script path doesn’t have jQuery, Angular falls back to the subset of jQuery known as jqLite. jqLite supports a small subset of jQuery functionality and lets AngularJS to work with DOM. It is also cross-browser compatible.

Can multiple ng-app directives exist in AngularJS in a single page?

Per HTML document only one AngularJS application can be auto-bootstrapped. The first ngApp is used to describe the root element to auto-bootstrap as an application. If another ngApp directive has been placed then it will not be processed by AngularJS and second app will be manually bootstrapped.

Is nesting possible for angular applications?

Nesting is not possible in AngularJS applications.

For further interview preparation and practicing, visit CodeFights. A platform exclusively dedicated to coding practice and interview preparations.

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Hash Tables and Their Significance

There are many challenges which can be managed by the use of hash tables to store elements which can later be looked up later in any program. The naïve coders mostly underestimate the importance of a hash table. With its comprehensive applications, hash table is a data structure which is fashioned in a way that it gets created when a vale is hashed and then it gets stored and you can create your own table if you have a list of names.

At first it seems like a lot of work with no prominent output but these hash tables have an enchanting property that speeds up operations that are critical. These critical operations are mostly asked in interviews.

This type of technology can be used for listing products on websites. So that instead of dealing with individual items, hashing every data and finding it quickly when needed in a large database is an advantage.

The questions which can be framed on hash tables are based on searching for elements in a big data pool, searching for duplicate elements in the database and reinstating or retrieving data swiftly. There are many challenges and tasks that can be resolved by using hash tables. Some of them are letter counts, two sum, three sum, non-repeating character, mean mode, etc. The initial novices who are still learning effective programming tackle the above topics by writing nested loop. It is manageable at a low scale. But when it comes to real time application when there are millions of data hash table does play a major role.  

CodeFights makes sure you write better codes and therefore we believe in giving tips and advices that are going to make you a better programmer. For practicing and learning more programs visit CodeFights, which not only gives you a platform to practice but also has over 40 programming languages to explore. Visit Today!