Toptal Engineering Expert
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.
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.
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.
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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Express, Koa, Meteor, Sails.js: A Node.js Framework Comparison
Some platforms have an overwhelming number of options for web frameworks. Node.js, the event-driven server-side JavaScript environment, is one such platform. Whether it’s the minimalist Express or the full-blown MVC web framework Sails.js, Node.js seems to have it all.
In this article, Toptal Freelance Software Engineer Chuoxian Yang explores four of the most popular Node.js web frameworks and discusses how each framework stands out from the rest of the crowd in Node.js.
Chuoxian Yang
Chuoxian is a full-stack developer and tech company founder who has built multiple large-scale projects from blueprint to launch.
Declarative Programming: Is It A Real Thing?
In a nutshell, declarative programming consists of instructing a program on what needs to be done, instead of telling it how to do it. This approach involves providing a domain-specific language (DSL) for expressing what the user wants. This DSL shields users from messy low-level constructs while still achieving the desired end-state.
While declarative programming offers advantages over the imperative approach it replaces, it’s not as straightforward as it may seem. In this comprehensive article, Toptal Freelance Software Engineer Federico Pereiro outlines his experience with declarative tools and explains how you can make declarative programming work for you.
Federico Pereiro
Maker of minimalist software. Designs, writes, tests, deploys and maintains real systems solving real (if boring) problems.
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