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Showing 561-568 of 595 results

Django, Flask, and Redis Tutorial: Web Application Session Management Between Python Frameworks

by Denis Kyorov

I love and use Django in lots of my personal and client projects, mostly for those involving relational databases and more classical web applications. However, by design, Django is very tightly coupled with its ORM, Template Engine System, and Settings object. Plus, it's not a new project: it carries a lot of baggage from the past to remain backwards compatible. In a few of my client projects, we've chosen to give up on Django and use a micro framework like Flask, typically when the client wants to do some interesting stuff with the framework. At the same time, we often need user registration, login, and more, all of which is easily handled with Django. The question emerged: is Django an all-or-nothing deal? Should we drop it completely from the project, or is there a way to combine some it with the flexibility of other frameworks?

9 minute readContinue Reading

Concurrency and Fault Tolerance Made Easy: An Akka Tutorial with Examples

by Diego Castorina

Writing concurrent programs is hard. Having to deal with threads, locks, race conditions, and so on is highly error-prone and can lead to code that is difficult to read, test, and maintain. This post provides an introductory guide to the Scala-based Akka framework, showing (with code samples) how Akka facilitates and simplifies the implementation of robust, concurrent, fault-tolerant applications.

13 minute readContinue Reading

Developing Mobile Web Applications: When, Why, and How

by Tomas Agrimbau

With the increasingly ubiquitous nature of mobile devices and applications, if you’re not already thinking about mobile apps, you probably should be. This post focuses on methodologies and tools to employ, and pitfalls to avoid, in the development of highly functional, intuitive, and easy-to-use mobile web apps.

13 minute readContinue Reading

Python Class Attributes: An Overly Thorough Guide

by Charles Marsh

In a recent phone screen, I decided to use a class attribute in my implementation of a certain Python API. My interviewer challenged me, questioning whether my code was syntactically valid, when it was executed, etc. In fact, I wasn't sure of the answers myself. So I did some digging. Python class attributes. No one really knows when (or how) to use 'em. In this guide, I walk through common pitfalls and conclude with a list of valid use-cases that could save you time, energy, and lines of code.

11 minute readContinue Reading

Elasticsearch for Ruby on Rails: A Tutorial to the Chewy Gem

by Arkadiy Zabazhanov

Elasticsearch provides a powerful, scalable tool for indexing and querying massive amounts of structured data, built on top of the Apache Lucene library. Building on the foundation of Elasticsearch and the Elasticsearch-Ruby client, we've developed and released our own improvement (and simplification) of the Elasticsearch application search architecture that also provides tighter integration with Rails. We've packaged it as a Ruby gem named Chewy. This post discusses how we accomplished this, including the technical obstacles that emerged during implementation.

12 minute readContinue Reading

Modernizing Legacy Software: MUD Programming Using Erlang and CloudI

by Michael Truog

The need to adapt legacy code and systems to meet modern day performance and processing demands is widespread. This post provides a case study of the use of Erlang and CloudI to adapt legacy code, consisting of a decades-old collection of multi-user game software written in C, to the 21st century.

7 minute readContinue Reading

Your Boss Won't Appreciate TDD: Try This Behavior-Driven Development Example

by Ryan Wilcox

Testing. It always seems to get left to the last minute, then cut because you're out of time, budget, or whatever else. Management wonders why developers can't just "get it right the first time", and developers (especially on large systems) can be taken off-guard when different stakeholders describe different parts of the system. With behavior-driven development, you can turn testing into a shared process that focuses on the behaviors of the system, why they matter, and who cares.

8 minute readContinue Reading

Automated Android Crash Reports with ACRA and Cloudant

by Ivan Dimoski

Making a basic Android app is easy. But making it reliable, scalable, and robust, on the other hand, can be quite challenging. With thousands of available devices pumped out from tons of different manufacturers, assuming that a single piece of code will work reliably across phones is naive at best. Segmentation is the greatest tradeoff for having an open platform, and we pay the price in the currency of code maintenance, which continues long after the app passes the production stage. In this post, we'll walk through a solution: automated crash reporting with ACRA and a Cloudant back-end, all visualizable with acralyzer.

9 minute readContinue Reading

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