Space Invaders Enterprise Edition
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!
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Async control flow in JavaScript: Promises, Microtasks, async/await
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'...
JavaScript: Calling a function with a variable number of arguments
This card describes how to pass an array with multiple element to a JavaScript function, so that the first array element becomes the first function argument, the second element becomes the second argument, etc.
Note how this is different from pas...
InfoQ: How to Design a Good API & Why it Matters
A well-written API can be a great asset to the organization that wrote it and to all that use it. Given the importance of good API design, surprisingly little has been written on the subject. In this talk (recorded at Javapolis), Java library desi...
Getter and setter functions for JavaScript properties
JavaScript objects can have getter and setter functions that are called when a property is read from or written to.
For example, if you'd like an object that has a virtual person.fullName attribute that dynamically composes person.firstName a...
JavaScript: Don't throw synchronous exceptions from functions that return a Promise
TLDR: A function is hard to use when it sometimes returns a promise and sometimes throws an exception. When writing an async function, prefer to signal failure by retur...
The Origins of Scala
When Java first shipped, Bill Joy and James Gosling and the other members of the Java team thought that Java should have generics, only they didn't have the time to do a good job designing it in. So because there would be no generics in Java, at l...
Speed up your websites: Put JavaScripts at bottom
For websites that don't do JavaScript rendering on the client, it's best practice to put script tags at the bottom of the HTML. This way, the page can start to render before scripts have been loaded and run.
The caveat is that you also have to mo...
How to install older versions of REE with rbenv on Ubuntu 12.04
Rbenv won't compile REE 2011.03 properly on Ubuntu 12.04, failing with an error in tcmalloc.cc.
If you want to keep tcmalloc functionality, you can do it like this:
- Open
~/.rbenv/plugins/ruby-build/share/ruby-build/ree-1.8.7-2011.03 - Re...
The JavaScript Object Model: Prototypes and properties
Speaker today is Henning Koch, Head of Development at makandra.
This talk will be in German with English slides.
Introduction
As web developers we work with JavaScript every day, even when our backend code uses anothe...
JavaScript dependency management and concatenation: Sprockets
Sprockets is a Ruby library that preprocesses and concatenates JavaScript source files. It takes any number of source files and preprocesses them line-by-line in order to build a single concatenation. Specially formatted lines act as directives to...