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Write Code to Rewrite Your Code: jscodeshift
How many times have you used the find-and-replace functionality (or RegEx) across a directory to make changes to JavaScript source files? Up your refactoring game by using codemods, scripts used to rewrite other scripts.
In this article, Toptal Freelance Developer Jeremy Greer walks us through three common uses of codemods, using the toolkit “jscodeshift.”
Jeremy Greer
Jeremy is a senior software engineer with a passion for modern JavaScript—client & server-side—including React, Redux, Angular, and Express.
Get Your Hands Dirty With Scala JVM Bytecode
The Scala language has continued to gain popularity over the last several years, thanks to its excellent combination of functional and object-oriented software development principles, and its implementation on top of the proven Java Virtual Machine (JVM).
Creating a language that compiles to Java bytecode requires a deep understanding of the inner workings of the Java Virtual Machine. To appreciate what Scala’s developers have accomplished, it is necessary to go under the hood, and explore how Scala’s source code is interpreted by the compiler to produce efficient and effective JVM bytecode.
Sergey Reznick
Sergey is an experienced software developer with a background in computer science and basic algorithms and over 20 years of experience.
The Rise Of Automated Trading: Machines Trading the S&P 500
More than 60 percent of trading activities with different assets rely on automated trading and machine learning instead of human traders. Today, specialized programs based on particular algorithms and learned patterns automatically buy and sell assets in various markets, with a goal to achieve a positive return in the long run.
In this article, Toptal Freelance Data Scientist Andrea Nalon explains how to predict, using machine learning and Python, which trade should be made next on the S&P 500 to get a positive gain.
Andrea Nalon
With an MCE and extensive ML and quantitative analysis training, Andrea’s a data science experience covers R, Python, VBA, Excel, and SQL.
Sass Mixins: Keep Your Stylesheets DRY
Nowadays, front-end development workflows involve many modern tools and preprocessors that not only streamline the whole process, but also allow you to spend less time on common web tasks, giving you more time to focus on other aspects of the project that require more careful and skilled insight. Sass, the scripting language for syntactically awesome stylesheets, comes with robust and built-in support for mixins - an essential feature for keeping your stylesheets DRY.
In this article, Toptal Freelance Software Engineer Justin Brazeau shows us 10 useful Sass mixins that help keep your stylesheets manageable by breaking them into smaller reusable bits, each with its own focus.
Justin Brazeau
Justin is a front-end website developer with a background in graphic design. He focuses on HTML, CSS, JavaScript, and WordPress.
Jumpstart Your PHP Testing with Codeception
Would you like to test your PHP code like a boss? Do you feel that basic unit tests and PHPUnit just don’t cut it anymore? If your answer to both questions is yes, you might want to try Codeception, a mature and well-documented testing framework designed to outperform PHPUnit and Behat.
In this post, Toptal Freelance Software Engineer Vasily Koval describes how he came to take the plunge and start using Codeception, and he explains why you should check out Codeception for your PHP testing needs.
Vasily Koval
Vasily is a web developer with more than nine years of extensive experience developing, optimizing, and supporting web applications.
10 Common Unity Mistakes
Before you use Unity’s straightforward and intuitive tool for multi-platform development, become familiar with and avoid these common Unity mistakes.
Tomas Macek
Tomas has more than a decade of experience with C# and Unity3D. His specialty is AR and VR, as well as 2D production.
Productivity On The Road: Work Full-Time, Travel Solo, Have Fun
Do you have what it takes to travel the globe while working full-time? Can you work on the road while still finding enough time to take care of yourself and enjoy the adventures of travel? It’s not a lifestyle for everyone, but it’s probably not as tricky or demanding as you think, especially when you have a sense of purpose.
In this article, Toptal Director of Operations Dror Liebenthal explains how to enjoy the nomadic lifestyle without compromising your professional performance, health, or social life.
Dror Liebenthal
Dror heads Toptal’s business operations team, leveraging experience gained working on countless Toptal projects and initiatives.
Clustering Algorithms: From Start to State of the Art
Clustering algorithms are very important to unsupervised learning and are key elements of machine learning in general. These algorithms give meaning to data that are not labelled and help find structure in chaos. But not all clustering algorithms are created equal; each has its own pros and cons.
In this article, Toptal Freelance Software Engineer Lovro Iliassich explores a heap of clustering algorithms, from the well known K-Means algorithm to the elegant, state-of-the-art Affinity Propagation technique.
Lovro Iliassich
Lovro is a Machine Learning Engineer and Data Scientist. He worked at Amazon as well as a researcher at multiple academic institutions.
Toptal's Quick and Practical JavaScript Cheat Sheet: ES6 and Beyond
Software engineers are always searching for the best tools and guides to help them be more productive and allow them to spend less time reading long technical specifications.
Today, Toptal is pleased to present a new resource to the community: the JavaScript Cheat Sheet - ES6 and Beyond. Toptal’s JavaScript Cheat Sheet is a quick, easily understandable reference guide. It is free to download and includes all the new and exciting features introduced with ES6 as well as the future experimental features from ES7.
Jesus Dario
Jesus is a co-founder of Netbeast.co. He has two years of experience as a full-stack developer as well as a year of experience as CTO.
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