Slides for Henning's talk on Sep 21st 2017.

Understanding sync vs. async control flow

Talking to synchronous (or "blocking") API

print('script start')
html = get('/foo')
print(html)
print('script end'...

The argument that using tests is a ideologic waster of time fails when one considers how it can help to insure architectural decisions.

UML is applying an abstraction at the wrong end of the problem. It is primarily used to sketch object models for inferior languages.

Sometimes you want to load code on demand. For instance, when a a large library is only used on a single screen, this library should only be loaded for that screen. It should not blow up the bundle size for all screens.

You can load code on deman...

If you need the initial user which you used to login to your Linux system or the time when you login you can do:

whoami

One purpose of this could be the .bashrc to show different Bash Prompts for root to different users:

if [ $(whoa...

LÖVE is an unquestionably awesome 2D game engine, which allows rapid game development and prototyping in Lua.

Rule engines are commonly used in enterprise-level companies to decide things like how much your car insurance premium will be. Let’s start using this for something more fun!

During debugging you might pepper your code with lines like these:

console.log('foo = ' + foo + ', bar = ' + bar)

I recommend to use [variable interpolation](https://makandracards.com/makandra/30113-the-developer-console-can-do-more-than...

There are different ways to run rake:

• On Rails 4.1+ projects, you have Spring and its binstubs which dramatically improve boot-up time for Rake and similar. You need to run bin/rake to use them.
• On older projects, you want to run "bundle ex...

If your Carrierwave uploader dynamically generates the filename (e.g. by incorporating a user's name), you must call model.save! after recreating versions.

uploader.recreate_versions! does not update the model with the stored filename.