Search
Asian Stocks Show Upward Trend as Trade War Worries Ease
15.5.2019
The US President Donald Trump seems to have softened his stand and is looking for a compromise from China that resulted in the Asian stocks rising from a 14 week low. The Asian stocks also rode high on the optimism that the Beijing government will inject more stimulus to the Chinese economy as they...
Using Array reduce
14.5.2019
Every developer who specializes in any programming language will tell you there’s a powerful tool the language provides that they rarely use and wish they knew more about. For me, it’s Array.prototype.reduce. I quite enjoy the other Array methods like map, filter, and find, but reduce...
The Thinking Behind Simplifying Event Handlers
9.5.2019
Events are used to respond when a user clicks somewhere, focuses on a link with their keyboard, and changes the text in a form. When I first started learning JavaScript, I wrote complicated event listeners. More recently, I've learned how to reduce both the amount of code I write and the number...
Earth day, API’s and sunshine.
1.5.2019
Cassie Evans showcases some really nifty web design ideas and explores using the API provided by the company her team over at Clearleft recently hired to cover their building's roof with solar panels. Cassie outlines her journey designing a webpage that uses the API to populate some light data...
An Illustrated (and Musical) Guide to Map, Reduce, and Filter Array Methods
26.3.2019
Map, reduce, and filter are three very useful array methods in JavaScript that give developers a ton of power in a short amount of space. Let’s jump right into how you can leverage (and remember how to use!) these super handy methods.
Array.map()
Array.map() updates each individual value in...
Chrome Lite Pages
19.3.2019
The Chrome team announced a new feature called Lite Pages that can be activated by flipping on the Data Saver option on an Android device:
Chrome on Android’s Data Saver feature helps by automatically optimizing web pages to make them load faster. When users are facing network or data constraints...
The Bottleneck of the Web
5.3.2019
Steve Souders, "JavaScript Dominates Browser CPU":
Ten years ago the network was the main bottleneck. Today, the main bottleneck is JavaScript. The amount of JavaScript on pages is growing rapidly (nearly 5x in the last 7 years). In order to keep pages rendering and feeling fast, we need to focus...
Using React and XState to Build a Sign In Form
24.1.2019
To make a sign in form with good UX requires UI state management, meaning we’d like to minimize the cognitive load to complete it and reduce the number of required user actions while making an intuitive experience. Think about it: even a relatively simple email and password sign in form needs...
Understanding the Almighty Reducer
13.6.2018
I was reently mentoring someone who had trouble with the .reduce() method in JavaScript. Namely, how you get from this:
const nums = [1, 2, 3]
let value = 0
for (let i = 0; i < nums.length; i++) {
value += nums[i]
}
...to this:
const nums = [1, 2, 3]
const value = nums.reduce((ac, next)...
List Processing with map, filter, and reduce
11.4.2018
Functional programming in JavaScript is all the rage these days.
And it should be: The benefits for readability, maintainability, and testability are dramatic.
"Functional programmmin