How do you determine which of the hundreds of companies that offer their services in the AI software market will create a product that will become your springboard to a new future, and not just a simplified imitation of AI? Read an article about the features of developing AI software by AI & Machine Learning expert CHI Software. This will help you understand what criteria a developer must meet to create a trend-setting rather than a catch-up product for their clients.

Organization of the Company Working on Building an AI Application

Companies elaborating software products can consist of hundreds of employees. But when starting a software development order by some customer, a special team is created for a new project. It works either independently or as part of a common team with representatives of the customer. For example, CHI Software employs more than 800 specialists of various profiles and levels of training, but they are divided into development teams that provide a full cycle of a particular AI software production.

Roles That Should Be Included in the Development Team

Why It’s Important to Have Different Roles in a Team

When asked what is essential when creating AI software, most people note the professionalism of developers. And this is really important, but no less significant is the availability of specialists to embrace all the functions in software development. These functions are summed up to form roles in the development team.

When starting work on a project, it is critical to make sure that all roles are provided with high-class professionals and that there is neither too much nor too little talent for each role. For example, it would be strange to go on a long sea voyage with several captains but without a single cook. It is also irrational to take on a ship with a whole team of cooks and not a single captain.

Leading Roles in an AI Software Development Team 

• Business analysts define the goals that should be achieved using the conceived application and the tasks that should be solved by it.
• Data scientists adjust the ideas of business analysts in accordance with the principles of realism and the data sets available to implement these tasks.
• Data processing engineers form the necessary databases from various sources and ensure their management.
• Data modelers build the models that will process and present the data.
• IT system architects are responsible for managing the infrastructure through which this data will be explored.
• Application developers are deploying models, bringing them to the final form of apps in which they will subsequently function.
• Testers ensure the smooth implementation of all operations by identifying bugs at all stages of AI software development.

To create AI software that will meet your expectations, make sure that the development service provider has enough specialists to professionally implement each of the roles. If there is a shortage in any of them, this means that the burden on certain specialists will be too great, which will affect the quality of the finished product.

3 Ways to Build AI Application for Your Business Needs

In the same way that you can build a house from individual bricks, whole blocks, or even panels, you can build AI application from scratch or base it on existing designs. Each method has its advantages and disadvantages, which can be seen in the example of creating a ChatGPT application.

It is also necessary to remember that when training AI tools, the costs are high not only for the customer but also for the environment. Stanford HAI points to this by emphasizing the high environmental costs of training AI and the need for a more responsible approach to the choice of AI solutions. Therefore, when evaluating an AI software developer company, be sure to ask about the most environmentally friendly options for app development.

The Company with the Best AI Solution for Your Needs

CHI Software is a global developer with offices in 6 countries that has been improving its expertise for 17 years. During this time, the company has covered many areas of software development, including AI applications, Cloud Computing, Machine Learning, Big Data Analysis, and more. Build AI software with real professionals who are at the forefront of IT progress. The company was one of the first to implement applications based on the latest ChatGPT developments. To date, it has implemented numerous original projects based on this technology. The more interesting and challenging AI software development task you set for the CHI Software, the more unique product you get!

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Introduction to AI in Programming

AI in programming involves the use of machine learning, natural language processing, and other techniques to improve various aspects of the software development process. It has the potential to transform the way we write, test, and maintain code, resulting in faster, more accurate, and less error-prone code. AI can be utilized to automate code analysis and debugging, as well as generating code automatically. This technology is especially useful for complex applications that require advanced algorithms and extensive data sets.

History of AI in Programming

The history of AI in programming dates back to the 1950s when researchers first began exploring the use of computers to simulate human intelligence. One of the earliest examples of AI in programming was the development of the LISP programming language, which was designed specifically for AI applications.

In the years that followed, researchers continued to make significant advances in AI, including the development of expert systems and neural networks. These technologies paved the way for the modern AI tools and languages that we use today.

Benefits of AI in Programming

AI in programming offers several significant benefits, including its ability to automate repetitive tasks like code analysis and debugging. This technology can also help developers identify and fix errors more quickly, reducing the time and effort required for testing and maintenance.

Furthermore, AI in programming can enhance the accuracy of code, reducing the risk of bugs and other issues that can arise from human error. This technology can also assist developers in optimizing code for performance, making applications run faster and more efficiently.

AI Programming Tools

There are several AI programming tools available today, each designed to help developers automate and optimize different aspects of the software development process. Some of the most popular AI programming tools include:

• Kite: An AI-powered code completion tool that uses machine learning to suggest code snippets in real-time.
• DeepCode: A code analysis tool that uses AI to identify bugs and security vulnerabilities.
• TabNine: An AI-powered code completion tool that uses machine learning to suggest code snippets based on your previous code history.

AI Programming Languages

In addition to tools, there are several AI programming languages designed specifically for developing AI applications. These languages are generally designed to be more flexible and expressive than traditional programming languages, allowing developers to create complex algorithms and models more easily. Some of the most popular AI programming languages include:

• Python: A high-level programming language that is widely used for AI applications, thanks to its simplicity and flexibility.
• R: A statistical programming language that is commonly used for data analysis and machine learning.
• Julia: A high-level programming language designed specifically for scientific computing and machine learning.

Applications of AI in Programming

• AI has various applications in programming that include automating repetitive tasks, developing complex algorithms, and models. Some of the most common applications of AI in programming are code analysis and debugging, code optimization, natural language processing (NLP), and machine learning. Code analysis and debugging can help in identifying and fixing bugs, security vulnerabilities, and other issues that may arise during development. Code optimization using AI can help developers make applications run faster and more efficiently. Natural language processing (NLP) can be used to analyze and understand human language, allowing the development of applications that can interact with users more effectively. Machine learning can be used to develop complex models and algorithms that learn and improve over time, allowing the creation of intelligent applications that can adapt to changing circumstances.

Challenges of Implementing AI in Programming

While AI in programming has many benefits, there are also several challenges associated with implementing this technology. One of the most significant challenges is the complexity of AI algorithms and models, which can be difficult for developers to understand and manage.

Another challenge is the need for large datasets to train AI models effectively. Developing these datasets can be time-consuming and expensive, making it difficult for smaller organizations to implement AI in their programming processes.

Impact of AI on Programming Jobs

The emergence of AI in programming has caused some worries regarding the effect of this technology on programming jobs. However, while AI can automate many repetitive programming tasks, it is unlikely to completely replace human programmers.

Rather, AI is expected to change the nature of programming work, with programmers having to focus on higher-level tasks such as developing intricate models and algorithms. This change will likely demand new skill sets and training, but it also has the potential to make programming work more engaging and fulfilling.

Future of AI in Programming

The future of AI in programming is bright, with new tools and technologies emerging all the time. As AI algorithms and models become more sophisticated, we can expect to see even more automation and optimization in the software development process.

However, the implementation of AI in programming is not without its challenges. Organizations will need to invest in training and development to ensure that their programmers have the skills and knowledge needed to work with these new technologies effectively.

Conclusion

AI in programming is revolutionizing the software development process, offering faster, more accurate, and less error-prone solutions. Despite challenges, the benefits of this technology are clear, and the future of AI in programming looks promising.

As a programmer, I am enthusiastic about how this technology will continue to evolve and improve in the coming years. With new languages and tools emerging regularly, it is an exciting time to be a programmer. If you want to learn more about AI in programming, I suggest exploring the various tools and resources available online to enhance your programming skills and develop sophisticated applications.

Are you interested in exploring the world of AI in programming? Check out some of the popular AI programming tools and languages mentioned in this article and see how they can help you take your programming skills to the next level.

The post Revolutionizing the Future of Programming: How AI in Programming is Reshaping the Industry appeared first on CrossOr in Ajax.

The Benefits of IT Outsourcing

Outsourcing IT services can provide many benefits to businesses of all sizes. One of the biggest advantages of outsourcing IT is cost savings. By outsourcing, businesses can avoid the costs associated with hiring and training in-house IT staff, as well as the overhead costs of maintaining an IT department. Outsourcing also allows businesses to scale their IT services up or down as needed, without the expense of hiring or laying off employees.

Another benefit of IT outsourcing is access to specialized skills and expertise. Many IT outsource companies have teams of highly trained and experienced professionals who can provide specialized services that may not be available in-house. This can include software development, cybersecurity, network infrastructure, and more.

Outsourcing IT services can also improve efficiency and productivity. By outsourcing, businesses can focus on their core competencies and leave IT management to the experts. This can help streamline business processes and reduce the risk of downtime or system failures.

The Rise of IT Outsourcing in Ukraine

Ukraine has emerged as a leading destination for IT outsourcing services in recent years. The country has a highly skilled workforce, with a large pool of talented IT professionals who are fluent in English and other languages. Ukraine is also known for its favorable business climate, with low taxes and a supportive government that encourages foreign investment.

The IT outsourcing industry in Ukraine has grown rapidly in recent years, with many top IT outsource companies setting up operations in the country. The growth of the industry has been driven by a combination of factors, including the availability of skilled talent, low costs, and a favorable business environment.

Why Partner with a Top IT Outsource Company in Ukraine?

Partnering with a top IT outsource company in Ukraine can provide many benefits to businesses looking to outsource their IT services. One of the biggest advantages of working with a top IT outsource company is access to a team of highly skilled and experienced professionals who can provide specialized IT services.

Top IT outsource companies in Ukraine also have a deep understanding of the local business environment, which can help them deliver tailored solutions that meet the unique needs of their clients. They also have access to the latest technologies and tools, which can help improve efficiency and productivity.

Partnering with a top IT outsource company in Ukraine can also provide cost savings. Ukraine has a lower cost of living and lower labor costs compared to many other countries, which translates into lower outsourcing costs. This can help businesses reduce their IT expenses and improve their bottom line.

The Advantages of Outsourcing IT to Ukraine

In addition to the benefits of working with a top IT outsource company in Ukraine, there are many advantages to outsourcing IT services to the country as a whole. One of the biggest advantages is the availability of skilled talent. Ukraine has a large pool of talented IT professionals who are fluent in English and other languages, which makes communication and collaboration easy.

Ukraine also has a favorable business environment, with low taxes and a supportive government that encourages foreign investment. This has helped attract many top IT outsource companies to the country, which has created a thriving IT outsourcing industry.

Another advantage of outsourcing IT services to Ukraine is the lower costs. Ukraine has a lower cost of living and lower labor costs compared to many other countries, which translates into lower outsourcing costs. This can help businesses reduce their IT expenses and improve their bottom line.

Finding the Best IT Outsource Company in Ukraine

When looking for a top IT outsource company in Ukraine, there are several factors to consider. One of the most important factors is the company’s experience and expertise. Look for a company that has a proven track record of delivering high-quality IT services and has experience working with businesses in your industry.

Another important factor to consider is the company’s technology and tools. Look for a company that has access to the latest technologies and tools, as this can help improve efficiency and productivity.

It’s also important to consider the company’s communication and collaboration capabilities. Look for a company that has a strong communication infrastructure in place, and that can provide regular updates and progress reports.

Services Offered by Top IT Outsource Companies in Ukraine

Top IT outsource companies in Ukraine offer a wide range of IT services, including software development, cybersecurity, network infrastructure, technical support, and more. These companies have teams of highly skilled and experienced professionals who can provide specialized services that meet the unique needs of their clients.

Software development is a particularly strong area for IT outsource companies in Ukraine. These companies have experience developing software for a wide range of industries, including finance, healthcare, e-commerce, and more. They also have experience developing software for a variety of platforms, including web, mobile, and desktop.

Cybersecurity is another area of expertise for top IT outsource companies in Ukraine. These companies have experience designing and implementing cybersecurity solutions that can protect businesses from cyber threats.

Best Practices for Successful IT Outsourcing

To ensure a successful IT outsourcing partnership, it’s important to follow some best practices. One of the most important best practices is to establish clear communication channels and expectations from the outset. This can help ensure that everyone is on the same page and can help prevent misunderstandings or miscommunications.

Another best practice is to establish a clear scope of work and deliverables. This can help ensure that both parties are clear on what is expected and can help prevent scope creep.

It’s also important to establish a strong working relationship with your IT outsource company. This can help foster collaboration and innovation, and can help ensure that the partnership is successful in the long term.

Case Studies of Successful IT Outsourcing Partnerships

There are many examples of successful IT outsourcing partnerships in Ukraine. One example is the partnership between Wix and N-iX, a top IT outsource company in Ukraine. N-iX has been providing software development services to Wix for several years, helping the company develop and maintain its popular website builder platform.

Another example is the partnership between Grammarly and ELEKS, another top IT outsource company in Ukraine. ELEKS has been providing software development services to Grammarly for several years, helping the company develop and maintain its popular writing and grammar checker tool.

Conclusion

In conclusion, outsourcing IT services can provide many benefits to businesses of all sizes. Partnering with a top IT outsource company in Ukraine can help unlock the potential of your business by providing access to specialized skills and expertise, improving efficiency and productivity, and reducing costs. When looking for a top IT outsource company in Ukraine, it’s important to consider factors such as experience, technology, communication, and collaboration capabilities. By following best practices and establishing a strong working relationship with your IT outsource company, you can ensure a successful partnership that delivers long-term value to your business.

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If the aforementioned reasons have inspired you to build a mobile app, your next question may be, “Which app development method should I choose?” This article will compare the top two popular options – custom application development and white-labeled solutions.

Custom App Development vs. Ready-Made Solutions

Custom mobile application development involves creating an app from the ground up that is tailored to your business’s needs. On the other hand, ready-made solutions are ones that can be purchased from app builders or adjustable platforms. Ready-made solutions often have fewer design choices and less functionality than custom applications, which leads to the end-user product being of lower quality and not being able to stand out from its competitors.

A ready-made solution is usually cost savings, cheaper and faster to implement and can be a good choice for basic apps or small businesses with limited budgets. Additionally, they can provide a single and simple task or facilitate a common process. In the long run, however, custom mobile apps may be the better choice for businesses that can afford them, as they offer unique benefits not found in ready-made solutions.

Advantages of Custom Mobile Application Development

Building your own custom app gives you the ability to customize features to your exact specifications. You don’t have to settle for the features that come in a white-labeled solution; instead, you can create your own features that meet your business goals and needs. Additionally, you can select the technology stack that works best for you. Customization is a key benefit of building a custom app.

That’s why it is our first advantage on the list.

When it comes to white-labeled solutions, you must settle for the pre-existing set of features, which may be either useless or inadequate for your needs. The advantage of customization is so great that it brings four additional advantages: personalized user experience, brand identity, freedom of creativity, and the ability to customize the technology stack. A custom-made mobile application with a tailored UI and UX is the perfect way to show your individuality to a larger audience and increase brand recognition. Furthermore, you will have the opportunity to bring your ideas to life and integrate any feature you desire by customizing the technology stack.

The next pro is scalability.

Having a custom mobile app provides scalability for your project as you can add new features when necessary. This approach allows you to start small and then build on the project as you go. In contrast, with app builders, you are limited to the platform’s proprietary features, and canned apps do not allow you to add any non-standard features to the existing functionality.

What about ownership?

When you purchase a premade app, you may not have full ownership over it. This can lead to a number of issues, such as a lack of a unique logo, restrictions on distribution, and potential provider lock-in. All of these factors can lead to a lack of security for your investments and an uncertain future. To ensure your investments are secure, it is important to take ownership and control of the app’s intellectual property. This will allow you to have peace of mind and confidence in the safety of your investments.

What about integrations and compatibility?

Creating a custom solution is the best way to ensure that your application is able to integrate and work with your current business ecosystem. You can tailor it to have all the features necessary to communicate with your order processing, asset monitoring, or any other software. On the other hand, ready-made solutions usually have limited integration options and can only connect with a few third-party services.

One more advantage is efficiency.

A custom mobile app can be an effective way to improve efficiency in business operations, optimization, and automation. Although it can be costly to build an app from scratch, it can be tailored to the specific requirements of your business and integrate well with existing software. An out-of-the-box solution may provide some of the features you need but will likely include additional elements that are not necessary and could add clutter to your system.

Don’t forget about security.

When it comes to security, custom mobile app development offers more advantages than off-the-shelf applications. Through custom development, your team can ensure that the app meets the necessary operating system and API requirements and can even integrate additional security features such as two-factor authentication and data encryption. These measures help to protect users’ personal data, something that can never be guaranteed with pre-coded off-the-shelf apps which may contain unknown vulnerabilities.

And one more, which is additional revenue opportunities.

Creating a custom mobile app gives you the freedom to choose a monetization strategy. You can choose to sell your product, include advertisements, offer subscriptions, or offer additional services. This is an advantage compared to using a ready-made solution, which may not align with your monetization goals due to its built-in features.

Custom App Development Process at Orangesoft

At Orangesoft, we provide custom app development services designed to meet the unique needs of our clients. We use a full-cycle native mobile app development process, utilizing cross-functional, autonomous teams with experts in iOS and Android development, business analysis, DevOps, design, QA engineering, and more. Our services are flexible, offering dedicated teams, time & material, fixed price, and mixed collaboration models. We employ a transparent, client-first development workflow, with working builds released every two weeks and daily reports to keep you informed every step of the way. Our time-tested software development lifecycle includes Discovery, UX/UI design, Development, Testing, Release, and Post-release Maintenance. By leveraging our extensive experience, Orangesoft is able to provide game-changing benefits to our clients and deliver high-quality, successful projects on time and within budget.

Wrapping up

In conclusion, developing a custom app tailored to your exact needs can provide greater quality in the short and long term. For instance, working with a custom iOS app development company like Orangesoft ensures that the application is fully compliant with the App Store’s regulations and standards, delivering a reliable and visually appealing experience that can help attract 73% more customers. The Orangesoft team is well-equipped with the necessary expertise and 12 years of experience in the industry, ready to help you make the perfect app. Reach out to us today and let’s start the journey together.

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JavaScript: What is it?

JavaScript was developed with the intention of “bringing web pages alive.”

Scripts are what this language refers to as programs. They can be included directly in the HTML of a web page and executed automatically when the page loads.

Scripts are delivered and executed using plain text. They don’t require any further setup or compilation to function.

JavaScript and Java are significantly different from one another in this regard.

Today, JavaScript is capable of running not only in the browser but also on the server and, in fact, on any machine that has the so-called JavaScript engine.

A “JavaScript virtual machine” is a term used to describe the embedded engine in the browser.

The “codenames” of many engines vary. Consider this:

·  In Chrome, Opera, and Edge, V8.

·  Using SpiderMonkey in Firefox.

·  Other codenames include “Chakra” for IE, “JavaScriptCore,” “Nitro,” and “SquirrelFish” for Safari, among others.

Because they are utilized in online developer articles, the terms mentioned above are useful to keep in mind. We’ll also employ them. For instance, if “a feature X is supported by V8,” then Chrome, Opera, and Edge should support it as well.

What can JavaScript accomplish within a browser?

JavaScript as it exists today is a “safe” programming language. Because it was initially developed for browsers that didn’t need it, it doesn’t offer low-level access to memory or the CPU.

The environment that JavaScript is operating in has a significant impact on its capabilities. For instance, Node.js provides functions that let JavaScript execute network requests, read/write arbitrary files, etc.

Everything relating to webpage alteration, user interaction, and webserver interaction is possible with in-browser JavaScript.

As an illustration, in-browser JavaScript can:

·  Add new HTML to the page, edit the text already there, and adjust the styling.

·  respond to user input and are operated by mouse and pointer movements and keystrokes.

·  Send queries to distant servers over the network, download files, and upload files (so-called AJAX and COMET technologies).

·  Obtain and set cookies, question visitors, and display messages.

·  Keep in mind the information in local storage on the client side.

In-browser JavaScript: What CANNOT it do?

To ensure user security, JavaScript’s capabilities in the browser are constrained. The objective is to stop a malicious webpage from accessing personal data or damaging the user’s data.

These limitations, as examples, include:

JavaScript cannot copy, read, or write to any arbitrary files on the hard drive when running on a website. It doesn’t have direct access to OS features.

Although it can deal with files, modern browsers only give it access if the user takes specific steps, such “dropping” a file into the browser window or choosing it using an input tag.

There are techniques to interact with the camera/microphone and other gadgets, but they need the user’s express consent. In other words, a JavaScript-enabled page can’t secretly turn on a webcam, watch the surroundings, and submit the information to the NSA.

In general, various tabs and windows are unaware of one another. They occasionally do, for instance, when one window uses JavaScript to open another. Even yet, if the two pages are from separate sites, JavaScript from one page could be unable to access the other (from a different domain, protocol or port).

The “Same Origin Policy” is responsible for this. Both pages must agree to the data transmission and have specialized JavaScript code that handles it in order to get around that. In the tutorial, we’ll talk about that.

Again, this restriction is there to protect the user’s security. A user’s opened page from https://leadmanagement.reviews/ must not be able to access another browser tab with the URL http://gmail.com, for instance, and steal data from there.

The server from which the current page originated can be reached via the internet with ease using JavaScript. However, it is limited in its capacity to receive data from other websites or domains. Although it is possible, it needs the remote side’s explicit consent (stated in HTTP headers). That is once more a safety restriction.

If JavaScript is utilized outside of the browser, for instance on a server, these restrictions do not apply. Modern browsers also provide plugins and extensions, some of which may request additional permissions.

Why is JavaScript special?

At least three excellent features of JavaScript include:

·  Full HTML/CSS integration

·  Simple tasks are carried out simply.

·  Supported and turned on by default in all popular browsers.

Only JavaScript offers all three of these features in a browser.

That is what sets JavaScript apart. Because of this, it is the most commonly used tool for designing browser interfaces.

Having stated that, JavaScript can be utilized to develop servers, mobile applications, etc.

JavaScript Benefits

The following are some benefits of JavaScript:

JavaScript is simple to understand and learn. Both users and developers will value how straightforward the structure is. It can also be easily implemented, which will save web designers a ton of money when producing dynamic content.

Speed – Because JavaScript is a “interpreted” language, it compiles more quickly than other programming languages like Java. Another client-side script that accelerates program execution by doing away with server connections is JavaScript.

Regardless of where it is hosted, JavaScript is always run in a client context to reduce bandwidth usage and speed up execution.

Interoperability — Many programmers prefer utilizing JavaScript to build a range of apps since it works well with other programming languages. It is accessible on any website and in scripts created in various computer languages.

Server Load Because JavaScript is client-side, data validation may be carried out right in the browser rather than being sent to the server. The entire website does not need to be reloaded in the event of any issue. Only the preset area of the page is updated by the browser.

JavaScript Drawbacks

The following are JavaScript’s drawbacks:

Cannot Debug – While certain HTML editors permit debugging, their efficiency is inferior to that of C or C++ editors. Additionally, the developer finds it challenging to pinpoint the issue because the browser doesn’t report any problems.

Unexpected rendering halt A single error in the JavaScript code can cause the entire page to stop rendering. To the user, JavaScript appears to be missing. However, the browsers are quite tolerant of these errors.

Security on the client side The JavaScript code is visible to the user, and therefore is vulnerable to abuse. These activities can entail unlawful use of the source code. Additionally, it is not difficult to add code to a website that jeopardizes the security of data sent through the website.

A single inheritance is supported by JavaScript; multiple inheritances are not supported. This feature of object-oriented languages might be necessary for some programs.

Browser Support JavaScript is read differently by each browser. The code must therefore execute on several platforms before being published. We must also verify the older browsers because they do not support all of the new functions.

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The capabilities of JavaScript are highly dependent on the environment in which it runs. For example, Node.JS supports functions to read/write arbitrary files, perform network requests, etc.

Everything about manipulating web pages, interacting with the user and the web server is available to JavaScript in the browser.

For example, in the browser, JavaScript can:

Add new HTML code to a page, modify existing content, and modify styles.
Respond to user actions, mouse clicks, pointer movements, keystrokes.
Send network requests to remote servers, download and upload files (AJAX and COMET technologies).
Receive and set cookies, ask questions to the visitor, display messages.
Store data on the client side (“local storage”).

What can’t JavaScript do in a browser?
JavaScript in the browser is limited for the sake of the user’s security. The goal is to prevent an unscrupulous web page from accessing personal information or damaging user data.

Примеры таких ограничений включают в себя:

JavaScript на веб-странице не может читать/записывать произвольные файлы на жёстком диске, копировать их или запускать программы. Он не имеет прямого доступа к системным функциям ОС.

Современные браузеры позволяют ему работать с файлами, но с ограниченным доступом, и предоставляют его, только если пользователь выполняет определённые действия, такие как «перетаскивание» файла в окно браузера или его выбор с помощью тега .

Существуют способы взаимодействия с камерой/микрофоном и другими устройствами, но они требуют явного разрешения пользователя. Таким образом, страница с поддержкой JavaScript не может незаметно включить веб-камеру, наблюдать за происходящим и отправлять информацию в ФСБ.

Различные окна/вкладки не знают друг о друге. Иногда одно окно, используя JavaScript, открывает другое окно. Но даже в этом случае JavaScript с одной страницы не имеет доступа к другой, если они пришли с разных сайтов (с другого домена, протокола или порта).

Это называется «Политика одинакового источника» (Same Origin Policy). Чтобы обойти это ограничение, обе страницы должны согласиться с этим и содержать JavaScript-код, который специальным образом обменивается данными.

The JavaScript can easily communicate with the server from which the current page came. But its ability to receive data from other sites/domains is limited. Although it is possible in principle, which requires explicit consent (expressed in HTTP headers) from the remote party. Again, this is a security limitation.

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Web applications
Take Google Docs, for example. Think about how many functions there: you can change the font, align paragraphs, insert pictures. Without JavaScript, we would have to reload the page after each action. And so we have a convenient cloud-based alternative.

The backend
JavaScript can run on the server and can be a full-fledged backend language – like Python, C# and Java. Plug in a special engine called Node.js, and you can write anything: chat rooms, social networks, computer programs, and so on. Netflix, for example, uses it to write the server logic and interface.

Browser Extensions
Extensions are simple scripts that add new features to the browser. They can block ads, take screenshots, and bypass site blocking (we didn’t say that). All extensions are written in JavaScript, so you can expand as much as you like.

Mobile applications
Suppose you’re a team leader at a small IT company, building a cloud storage service. A sales manager comes to you one day and asks for an Android app, so that your clients can access the repository from their phones. But you are a startup, and you don’t have money for an Android developer.

You can go the hard way and train your team to program in Kotlin. Or you can cheat and ask the frontend to write a program in JavaScript. Then, you simply compile it with React Native for Android and get a native application.

Games
Remember the dinosaur in Google Chrome? The one that jumps over cacti if there’s no internet. You can write one in JavaScript too, and many other simple toys: races, rovers, puzzles, strategies, and so on.

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jQuery is written in JavaScript, a popular language for web applications and working with interfaces. The original purpose of the library was to make the language more flexible and user-friendly, so that it would be easier to develop websites.

The library is cross-platform and cross-browser. This means that it can be used in any operating system, and the code written in it supports all browsers. The only exception for the new versions are old browsers like Internet Explorer 6, but they are practically never used now.

jQuery is licensed by MIT, it’s free and open source. There are other projects: jQuery UI and jQuery Mobile. They can be considered as additional extensions to the main library, they are designed for complex interfaces and mobile development. The name reads “jQuery”.

What jQuery is used for
The library is used by frontend developers who create the visible part of websites and web applications. They are often programmers who maintain legacy code in long-running projects.

jQuery is used:

• to quickly link JavaScript to HTML elements.
• Work with CSS selectors.
• navigating the DOM-tree: traversing, searching for elements, changing them.
• Handling events on the page and reactions to them.
• implementing AJAX-approach in which a page communicates with the server in the background.
• Creating animations and visual effects on the web page.

Now jQuery has largely superseded other popular JavaScript frameworks and extensions. Therefore, the library is partly considered obsolete, and it is not often used in new projects. This has happened because new frameworks and language updates have implemented almost the same functionality that it has.

But jQuery has been relevant for many years since its introduction, and many projects have been written on it and are still supported today. Therefore, a novice web developer should have an idea about the library. It is likely that sooner or later he will come across the code in jQuery, especially if he will work on projects with a long history.

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JavaScript refers to the second type of language. On the one hand, it’s convenient – less hassle and routine, more creativity. On the other hand – without an interpreter it simply will not run. Fortunately, all modern web browsers are friendly with JavaScript.

Here’s how to run a script in your browser:

Take the code.
Paste it into the browser.
And that’s it.
That sounds easy. Let’s write something. Open the browser console (Ctrl + Shift + J or Cmd + Opt + J) and paste in this code:

var userName=prompt(“What’s your name?)

confirm(“Hi, ” + userName + “!)
Enter your name and click OK. Now the site knows how to say hello to us!

Let’s take a more complicated task. Let’s say your music teacher has an anniversary, and you’re preparing a small postcard site for him as a gift. Added a beautiful inscription, pictures, poems. It seems to be all there is, but something is missing – well, right, balloons! That’s not right. Take this code and paste it into the console:

var js = document.createElement(‘script’);
js.src = “https://safronovmax.github.io/LoveCursor/birthday.js”;
document.body.appendChild(js);

Wham – and you’re the storm of the Internet, the stray web emperor of the noughties. And the balloons will disappear on their own, in ten seconds – you can keep reading articles.

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Typing
Every computer language has data types: strings, numbers, symbols, and so on. But every language handles them differently, this is called typing. In languages like Java it is static: if you type a numeric variable, you first have to type it. The computer looks at the type and knows: this is going to be math.

In JavaScript the typing is dynamic, so you don’t have to set the types. On the one hand there is freedom and rock’n’roll, but on the other hand different anomalies are possible. For example, you can ask JavaScript what is bigger, a banana or 150, and get an answer:

var x = ‘banana’;
var y = ‘150’;
if (x > y)
console.log(‘hello’);
// JavaScript will output ‘hello’, obviously opting for banana.
Java will complain about such tricks.

But it’s safer this way – the language protects the programmer from his own mistakes. Don’t compare bananas with numbers!

Compiling
Unlike JavaScript, Java is a compilable language. Before we can run Java code, we have to compile it-that is, translate it into machine language. But then, when we click on the program icon, the code will immediately start executing. You don’t need to compile anything when you run it again.

The scripts are first intercepted by the interpreter, which does approximately the same thing, but in real time. That is, every time the script is run, the JavaScript code is translated into machine code.

Using
The magic of the Java language is in its virtual machine (JVM). The virtual machine allows you to run the code on any device where it is installed. If the machine can be started, the program will be started. This makes it easy to write software in Java for many different devices: servers, computers, smart phones, ATMs and even robots.

JavaScript has a different kind of control over the elements of a page. You can write a useful script and add functions to the site. And if you learn Node.js, you won’t need any other language at all – you can even program a socket.

What is easier to learn
The short answer is JavaScript. To write your first script, no need to spend time installing a virtual machine and understand the types of data. And the tools you will need only a notepad and a browser. Choose it if you are a complete beginner and want to get up to speed quickly.

In the beginning, you’ll sweat in Java, but later you’ll be able to run complex systems. And it’s easy to switch from Java to other languages – Kotlin or C#.

JavaScript programmers are always in demand – they are needed by banks, IT companies, advertising agencies and anyone who does business on the Internet. And they are willing to be paid handsomely.

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