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Today we have something about a problem well-known to experienced developers. We will discuss the N+1 queries problem and how to deal with it using ActiveRecord.
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As a developer, you're up against some stiff competition when looking for a new role. You've got to really be one step ahead of the pack when it comes to your job search. Here are 9 of the biggest mistakes that developers make in the recruitment process, and how you can avoid them.
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Introduction Have you ever wondered what it takes to build good IoT product? How much effort does it take to create useful solution which will work safely and serve many clients? It can take a lot of time to do it. Fortunately there are some services like Google Cloud IoT or Amazon AWS IoT which try to help developers overcome all of common obstacles and make the work much easier. Today we will talk more closely about Amazon services. The main goal of their platform which was launched in 2015 is to offer tools that will help to spend more time on product development and not on common tasks that could be easily automated.
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One of the most important things in mobile development is secure communication, especially between the app and its backend server. Currently, the most common architecture of web services is REST based on HTTP. The best protection method for this model of communication is the TLS/SSL standard. It can be combined with the HTTP protocol to create an encrypted variant called HTTPs. HTTPs ensures safe, encrypted communication channels between client apps and the backend server. Moreover, implementing this security feature is very simple on Android. You just need to watch out for some common pitfalls.
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Material Design on iOS

Material Design is a style created by Google, presented for the first time on Google I/O 2014 and launched just after the keynote. The basic metaphor of material design is a flat sheet of paper in 3D space. It is the default approach for designing Android applications, however, Google uses it on other platforms such as iOS and Web.
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Lately, I've stumbled upon a Java class that was performing the exact task I had on my mind when starting to write my gem. The class is extracting text from PDF while keeping the text structure. I was a Java developer once, but I wanted my project to still use Ruby.
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Data normalization is useful when app state is getting too big, has deeply nested information and difficult to use. When normalizing data we need to follow few rules:
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JavaScript is taking the IT job market by storm, yet many aspiring software developers worry that learning the technology may not be the best way to land their dream job. They are not wrong to carefully consider their options, as other languages dominate particular niches on the market, such as Python in the case of data analytics. What are the reasons to learn or polish your skills in Node.js, then?
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Generating Random Numbers in Swift

Generating (pseudo)random numbers is pretty easy, but there are a few nuances that everyone should know. Generating cryptographically secure random numbers is a bit more difficult, but I'd like to present it too. Let's dive into this random blog post.
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In the previous part of this post, you have added database and navigation to your project. It is time to finish this application and sum up all you have learnt.
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