JavaScript Arrays are probably my favorite primitive in JavaScript. You can do all sorts of awesome things with arrays: get unique values, clone them, empty them, etc. What about getting a random value from an array?
To get a random item from an array, you can employ Math.random
:
const arr = [ "one", "two", "three", "four", "tell", "me", "that", "you", "love", "me", "more" ]; const random1 = arr[(Math.floor(Math.random() * (arr.length)))] const random2 = arr[(Math.floor(Math.random() * (arr.length)))] const random3 = arr[(Math.floor(Math.random() * (arr.length)))] const random4 = arr[(Math.floor(Math.random() * (arr.length)))] console.log(random1, random2, random3, random4) // tell one more two
As for when you would need random values from an array is up to your individual application. It’s nice to know, however, that you can easily get a random value. Should Array.prototype.random
exist?
JavaScript Promise API
While synchronous code is easier to follow and debug, async is generally better for performance and flexibility. Why “hold up the show” when you can trigger numerous requests at once and then handle them when each is ready? Promises are becoming a big part of the JavaScript world…
Fade Images with MooTools LazyLoad
I recently received an email from a MooTools developer asking a great question about my LazyLoad class: ”I’m using your LazyLoad MooTools plugin (which is great, by the way). I have been trying to figure out how to modify it so that once an image scrolls into…
[ad_2]
Source link