Get Node.js Command Line Arguments with yargs
Using command line arguments within Node.js apps is par for the course, especially when you're like me and you use JavaScript to code tasks (instead of bash scripts). Node.js provides process.argv but that doesn't provide a key: value object like you'd expect:
/*
$ node myscript.js --key1=value1 --key2=value2
[ 'node',
'/path/to/myscript.js',
'--key1=value1',
'--key2=value2' ]
*/
Bleh. If you want to work with a sane API for command line arguments, use yargs:
// Get the yargs resource
var yargs = require('yargs').argv;
// Check for arguments
if(yargs.someKey === expectedValue) {
// Do whatever
}
/*
yargs = {
key1: value1
key2: value2
};
*/
yargs provides a key:value object for arguments instead of the native process.argv mess. No hassle, no fuss, just access to command line arguments with a logical API. Happy noding!
![Responsive and Infinitely Scalable JS Animations]()
Back in late 2012 it was not easy to find open source projects using requestAnimationFrame() - this is the hook that allows Javascript code to synchronize with a web browser's native paint loop. Animations using this method can run at 60 fps and deliver fantastic...
![Write Better JavaScript with Promises]()
You've probably heard the talk around the water cooler about how promises are the future. All of the cool kids are using them, but you don't see what makes them so special. Can't you just use a callback? What's the big deal? In this article, we'll...
![Drag. Drop. Lock.]()
I've received dozens of emails about my Six Degrees of Kevin Bacon Using MooTools article. The MooTools in my article contained a lot of conditional code to require correct dropping per the game and many people requested that I simplify the process and just...
![Duplicate the jQuery Homepage Tooltips]()
The jQuery homepage has a pretty suave tooltip-like effect as seen below:
The amount of jQuery required to duplicate this effect is next to nothing; in fact, there's more CSS than there is jQuery code! Let's explore how we can duplicate jQuery's tooltip effect.
The HTML
The overall...
[pirateAccent]Yaaaarrrrrg!![/pirateAccent]