2020 isn’t half done and society has already changed fundamentally. The COVID-19 pandemic has forced many people into unemployment because customers can’t visit their stores anymore. When revenue drops, business owners have to ask themselves: What part of their workforce is crucial to operating the company? For companies that sell software services to developers, you could get the impression that a “developer relations” (DevRel) team could be critical for that company.

The world is full of linear relationships. When one apple costs $1 and two apples cost $2, it's easy to figure out the price of any number of apples. But what happens when you have 100s of data points? What if your data source is noisy? That's when it's helpful to use a technique called linear regression. In this article Julie Kent shows us how linear regression works, and walks through a practical example in Ruby.

It is widespread to have parent-child associations in Rails applications. On the parent side is a :has_many association, and on the child side is a :belongs_to association. Examples include an article with comments, or an author with books--the former is the parent, and the latter is the child. It is often useful to display a count of the children alongside information about the parent, without necessarily loading all the child records.

We are excited to announce NSolid 3.11.1, which introduces Role Based Access Control along with support for Node.js Erbium v12.16.2 and Dubnium v10.20.1. If you are an Enterprise or Advanced Tier User, you can now use NodeSource’s central control nexus, accounts.nodesource.com to give and revoke Role Based Access Control permissions for the NSolid Console and accounts.nodesource.com.

If you haven’t checked out the first part of Diagnostics in Node.js, click here. This is a 3-part blog series on Node.js. It is based on Colin Ihrig's talk at JSConf Colombia. The topics are separated by the age of diagnostic techniques - from the oldest to the newest: Let’s begin! 🚀

Insurance companies around the world are striving ahead with innovative offerings that are fundamentally changing the insurance landscape. Insurance companies are creating personalized offerings and products that are tailored to the specific needs of their customers. For example, they are implementing usage-based insurance (UBI) based on driving habits, miles driven and driving history and discounts on health insurance based on health trackers, etc.).