Given  let doAsynchronousStuff = () => {   return new Promise(resolve => {     setTimeout(() => {       resolve("abcdefg"[Math.floor(Math.random() * 7)])     }, Math.PI * 1 + Math.random())   })   .then(data => console.log(data))...
For certain situations, composition is advocated over inheritance. I see this happening more and more in the Ruby and Javascript community.  Composition sounds a lot like multiple inheritance. I have even read that internally in some Ruby implementat...
I'm just reading JavaScript: The Definitive Guide by David Flanagan.  I'm really enjoing and I'm happy my first Javascript book is this one. :)  However, I can't make much sense of this paragraph (3.7 Immutable Primitive Values and Mu...
There was this problem that asked to return all unique triplets of elements of an array which add up to zero (swapping two elements' places in the triplet does not count as unique).  I came up with the following code:    function threeSum(nums) {...
In short, I want to be be able to output a sorted array based on provided instructions but only at a given time. I'm looking for a Javascript implementation which works more or less like the example below.   In short, I want to be be able to outp...
Eg. Say this is our JavaScript code:  let a = x => {   let y = x * 2   return z => x + y + z } let b = a(1) let c = b(2)   Can I evaluate this using a substitution model, or do I need an environment model?  I began like so:  let c = ((x => {...
I just read the spec of ulid and I don't why it converts timestamp to a complicated string? Can't it just be timestamp with a sequential number?...
How can we create the vertical bar / spiral / splash kind of page animation effect found as we scroll down the web page at http://grouek.com/ website? I guess it is CSS3 or something advanced than it like Canvas. But is there any...
I have a fixed navigation bar and an image on my webpage. I want to add another image on top of this image, but when I use "position: relative" and position:absolute", and I scroll, the 2 images go over my navigation bar.   Can anyone hel...
I really hope you can help me I have an array of objects and I need an algorithm or a pointer to something to read up on that will sort them by similarity to their neighbours.  For Example  [    {a:12,b: 7,c: 5},    {a: 5,b: 5,c: 5},    {a: 3,b: 3,c:...

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