Systems | Development | Analytics | API | Testing

Scalable chat app architecture: How to get it right the first time

Live chat is everywhere. From connecting distributed workers across continents, through providing an efficient customer service channel, to bringing together online communities, chat is central to how we communicate. This demand puts an unusual level of pressure on chat app operators to make sure that every message reaches its destination, every time.

TDD vs BDD: Full Comparison

TDD (Test Driven Development) and BDD (Behavior Driven Development) are fairly similar development approaches that both emphasize testing and collaboration, yet have major differences in focus and methodology. Simply put, in TDD, developers test first, then use the test results to guide their development, while in BDD, developers express the system behavior they want to create through Gherkin syntax, then code according to those Gherkin expressions.

A Comprehensive Guide To Build a Successful DataOps Culture in Your Team

Table of Contents Can Goktug Ozdem is the founder of Datrick. He is a data engineer with over nine years of experience in the field. He is a big fan of remote work and is passionate about bringing insights through data while traveling to different parts of the world. DataOps is an orchestration practice for analytics, increasing the degree to which insightful analytics are delivered, atop robust frameworks and systems.

How to Resolve TypeError: 'NoneType' object is not subscriptable in Python

When working with Python, attempting to access an index or slice of an object that has the value None may result in TypeError: 'NoneType' object is not subscriptable. Let’s delve into why this TypeError occurs and how to resolve it. None is a unique constant in Python that stands in for the lack of a value. It is employed to show that a variable or expression does not possess a value. The Python built-in class NoneType has an object called None that belongs to it.