APS Sistemas

Generating Music With Sonic Pi and Ruby

1 minute read Published:

Hacking making music
Sonic Pi is an Integrated Development Environment (IDE) for writing music in Ruby. I write code with Ruby using the Sonic Pi IDE and sample myself screaming over it with Audacity under the artist name Messica Arson. The sound I create is very much inspired by the strange sounds of noise music combined with my screams I perfected while fronting a punk band. In this tutorial we’ll walk through how to create this song together.

Version Control Before Git With CVS

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Version control systems
Github was launched in 2008. If your software engineering career, like mine, is no older than Github, then Git may be the only version control software you have ever used. While people sometimes grouse about its steep learning curve or unintuitive interface, Git has become everyone’s go-to for version control. In Stack Overflow’s 2015 developer survey, 69.3% of respondents used Git, almost twice as many as used the second-most-popular version control system, Subversion.

Architecting the Reactive Flutter App

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Flutter development

Flutter, Google’s open-source platform for developing high-performance mobile applications that run on multiple operating systems from the same codebase, sports a modern reactive architecture in addition to an attractive widget library. This talk covers how to adapt state management strategies like Rx and Redux for use with your Flutter application.

CGNAT

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Moving to IPv6
Carrier Grade NAT, (CGN, CGNAT, CG-NAT) is also known as Large Scale NAT (LSN). Like regular Network Address Translation (NAT), it shares an outside IP address among multiple inside local (private) IP addresses. This feature is utilized to alleviate the IPv4 address exhaustion. The difference with the legacy NAT solutions is that CGN provides a standardized (RFC 6264, draft-ietf-behave-lsn-requirements-09) transparent translation scheme (through EIM, EIF, hairpinning), and the ability to limit the resource usage per connection.

Brad's Homelab Setup

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Stuff that matters
I have 3 physical machines plugged into 3 switches, with all switches connected to each other. I don’t have a physical router/gateway. Instead, a Linux virtual machine handles the IPv4 NAT, IPv6 announcements, DHCP, DNS, etc, and that Linux VM floats between the 3 machines as needed, including live migration during maintenance. My 4 Wifi APs are PoE-powered from the two switches. I have two ISPs. I have two UPSes and two PDUs powering separate halves of the gear, and separate ISPs, giving me about 35-45 minutes of runtime (and thus Internet) during a power outage.

Hackers 1O

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Hackers del 1 de octubre
Internet ha viscut aquesta tardor a Catalunya un episodi de repressió i resistència sense precedents a Europa. És la lluita entre un estat espanyol emparat per la justícia i un ciberactivisme voluntari que espontàniament pren el relleu de la Generalitat per construir a contrarellotge el sistema informàtic de l’1 d’octubre. El joc del gat i la rata culmina la jornada del referèndum quan té lloc a la xarxa una autèntica ciberguerra.

From Java to Kotlin and Back Again

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Cosas que pasan con Kotlin
Kotlin is popular, Kotlin is trendy. Kotlin gives you compile-time null-safety and less boilerplate. Naturally, it’s better than Java. You should switch to Kotlin or die as a legacy coder. Hold on, or maybe you shouldn’t? Before you start writing in Kotlin, read the story of one project. The story about quirks and obstacles becoming so annoying that we decided to rewrite. Continue Reading…

Flutter It's Dart Killer App

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Make Android Programming Great Again
This past week we started using Google Flutter to build a new mobile app for Invoice Ninja, I thought it may be helpful to share some of the things we’ve learned early on. What is Flutter? At a high level it enables building high quality mobile apps for iOS and Android using a single codebase. While this has been possible for a while now with frameworks like React Native the catch is they use a JavaScript bridge which can impact performance.

Rails 5.2.0 Final

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New release of Ruby on Rails Framework
Nearly 14 years since the first public version of Rails, it’s our pleasure to release yet another major upgrade to the framework in the form of 5.2.0 final. We’ve been diligently polishing Active Storage and the other big new components for stable release, and it’s great to see so many applications already running the release candidates in production. Basecamp and Shopify have both been running Rails 5.2.0 for quite a while.

Version 6 of Angular Now Available

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New version of Angular
The 6.0.0 release of Angular is here! This is a major release focused less on the underlying framework, and more on the toolchain and on making it easier to move quickly with Angular in the future. As a part of this release, we are synchronizing the major versions going forward for the framework packages (@angular/core, @angular/common, @angular/compiler, etc), the Angular CLI, and Angular Material + CDK. All are releasing as 6.

Ruby on WebAssembly

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Ruby ASM programming for the web
Welcome to 2018, where some of the most exciting innovations are happening in the compiler space. Sure, there’s things like AR, VR, and machine learning on the bleeding edge, but don’t discount those technologies as old as computing itself, the software responsible for translating the source code we write into something the machine can actually understand. Much of this resurgence is thanks to LLVM, the modular compiler infrastructure project. Why is it such a big deal?