Type Conversion with JavaScript Arrays
JavaScript's loose nature allows developers to employ amazing tricks to do just about anything you'd like. I've detailed how you can filter falsy values in arrays using a filter(Boolean) trick, but reader David Hibshman shared another trick for typecasting array values the same way.
To typecast an array of elements, you can use map and the desired return type:
["1", "9", "-9", "0.003", "yes"].map(Number);
// [1, 9, -9, 0.003, NaN]
I love this trick but you could argue the code itself could be considered confusing, so wrapping it a helper function would be helpful:
function arrToNumber(arr) {
return arr.map(Number).filter(Boolean);
}
Validation could and should probably be more rigorous but basic validation through typecasting might help you!
![Create a CSS Cube]()
CSS cubes really showcase what CSS has become over the years, evolving from simple color and dimension directives to a language capable of creating deep, creative visuals. Add animation and you've got something really neat. Unfortunately each CSS cube tutorial I've read is a bit...
![Introducing MooTools Templated]()
One major problem with creating UI components with the MooTools JavaScript framework is that there isn't a great way of allowing customization of template and ease of node creation. As of today, there are two ways of creating:
new Element Madness
The first way to create UI-driven...
![Submit Button Enabling]()
"Enabling" you ask? Yes. We all know how to disable the submit upon form submission and the reasons for doing so, but what about re-enabling the submit button after an allotted amount of time. After all, what if the user presses the "stop"...
![Fix Anchor URLs Using MooTools 1.2]()
The administrative control panel I build for my customers features FCKEditor, a powerful WYSIWYG editor that allows the customer to add links, bold text, create ordered lists, and so on. I provide training and documentation to the customers but many times they simply forget to...
The
.filter(Boolean)part also sees the zeros as booleans and removes those numbers.