Jayway Blog

OK threads aren't "BAD" or "GOOD", threads are a tool to be used correctly. Threads are like a data super-highway and all the incorrect uses of them arise from using them for way to little data. Akin to building a 5 lane highway for 5 cars to pass. A thread has some amazing things of being able to switch an execution very fast (built into things on the CPU level) and memory caching/storing advantages. Aka a thread is meant for a compute heavy task like rendering something, or running a decode in the background, mainly doing heavy math. Threads provide great things but at a cost. just like a highway they cost a lot ( a lot of memory in your ram) and require some maintenance and management (locking mechanisms) The problems with threads arise when people think its ok to use them everywhere for all tasks parallel or async. Example Apache used to start a thread for each connection to server which at that time took 40 MB + .5 sec and this allowed a myriad of attacks on, one of them being slow loris. In java-script if you start a new web worker thread, that's actually a new V8 instance and costs you again a lot in memory and startup time. This "start a thread for everything" was definitely the prevelant thinking in the first decade of 2000, and people were not really thinking about hidden costs. Come along Ryan Dahl with node.js in 2009 and "OMG everyone forgot there are such things as event loops" An event loop is basically a much cheaper single threaded async way of…

I learned with this article. And it teaches how to combine Poetry with Pyenv effectively. https://blog.jayway.com/2019/12/28/pyenv-poetry-saviours-in-the-python…

Clojure allows this very brief copypasta `(defmacro dbg [x] `(let [x# ~x] (println "dbg:" '~x "=" x#) x#))` https://blog.jayway.com/2011/03/13/dbg-a-cool-little-clojure-macro/ Wish Python has this by default though.

Well, you could definitely front two versions of your application lambda function with a traffic splitter lambda function that would send 99% of traffic to the production alias and 1% to the canary (or whatever the number you wanted was. See how to call one lambda from another: http://stackoverflow.com/questions/31714788/can-an-aws-lambda-function… and aliases: http://docs.aws.amazon.com/lambda/latest/dg/versioning-aliases.html This post might also be of interest: https://blog.jayway.com/2016/09/07/continuous-deployment-aws-lambda-be… Note, I have never done this, this is just how is approach it.

The nice thing about JavaScript is that you have first-class functions that are closures, so you don't have to do OOP at all if you don't want to. And your objects don't have to define methods because you can just define functions outside of methods. And although JavaScript's prototypes don't solve the fragile base class problem, they do offer a handy solution to the expression problem: http://www.jayway.com/2013/06/21/15201/

Jayway is really good. http://www.jayway.com/2013/05/09/opengl-es-2-0-tutorial-for-android-pa… But apart from that, the usual suspects, www.stackoverflow.com and www.gamasutra.com are ace.

Async looks nice, but this (http://www.jayway.com/2012/10/07/asyncawait-in-c-a-disaster-waiting-to… makes me wonder whether it is the right solution for this problem. Breaking what most programmers think are the 'laws' of refactoring is not a good thing.

oh yeah, I forgot about these guys: http://www.jayway.com/jobs/ They're hiring iOS devs and seem like a good company. Offices right next to the central train station too.

scripting xcode UI to build a project? ouch, you're doing it wrong. Check out xcodebuild. http://blog.jayway.com/2010/01/31/continuos-integration-for-xcode-proj…