Javascript callbacks are one of the most important concepts to understand. I never knew the importance of understanding them until I started trying to learn Promises and Async/Await which aim to replace and solve problems with callbacks.
I had trouble understanding promises, I kept asking myself, “Where and why would I use this?”. I would read an article talking about using Promises with Fetch API I would get it in that context but I kept wondering about the situation I would create a Promise for my code.
I must mention I also had a very poor understanding of asynchronous programming in JavaScript, so I was set up to fail. Learning more about asynchronous programming lead me to callbacks which gave me an aha moment, the light bulb went on. I finally understood the hype about Promises and Async/Await.
In this article, We are going to take a look at the difference between synchronous and asynchronous programming in JavaScript. We will then proceed to learn about the importance of callbacks, creating callbacks, and finally, we will cover about callback hell.
By the end of this tutorial, you will understand:
- Synchronous and asynchronous behavior in JavaScript
- Why and when callbacks are needed
- How to create callbacks.
- Callback hell
I believe the knowledge you will gain from reading this tutorial will be an invaluable prerequisite to learning Promises and Async/Await.
Link to the full article: https://www.stanleyulili.com/javascript/asynchronous-programming-with-callbacks-in-javascript/
Here's the link: http://sortvisualizer.com (try it with sound on!)
Let me know what you think! Any feedback is much appreciated!
This project is open source: https://github.com/Myphz/sortvisualizer
sed -e "s/[0-9]/;&/g; s/9/8o/g; s/8/7o/g; s/7/6o/g; s/6/5o/g; s/5/4o/g; s/4/3o/g; s/3/2o/g; s/2/1o/g; s/1/o/g; s/0//g; :cs; s/^;//; s/o;/;oooooooooo/; t cs; :r; s/^oo//; t r; s/^$/even/; s/^o$/odd/"
Very simple code, great performance - O(n) space usage, and complexity of (i think) O(10^n)
Edit: the time complexity is much better than that, reaching (only) O(n^4), but at the same time, space usage is much worse, at O(2^n).
Hello everyone,
I'm looking for a way to improve my coding skills in order to eventually expand my scope of duties in my job. Through my studies and work experience I have solid knowledge in HTML and CSS, JavaScript I have only marginally heard of. All in all, I have a relatively broad technical understanding and am looking for a way to expand my skillset in this direction.
Now to my question: which programming language is useful for a UI/UX designer at the moment? Just learning the basics in JavaScript? React? PHP? WebGL? There are just masses of different tools, but which of them are really useful for practice?
Maybe there are people here who felt the same way, who have a good overview of what is useful at the moment. Or maybe one or two developers are reading along who can tell me what they are missing from some UI/UX designers.
I would be very grateful for your tips.
TL;DR: I'm looking for ways to improve my skillset in programming languages as a UI/UX designer. Which ones are useful?
Threading is essential to make use of our multi-core iPhones. Learn how to use GCD (Grand Central Dispatch), starting with Synchronous & Asynchronous programming in Swift.
https://www.swiftpal.io/articles/how-to-use-gcd-grand-central-dispatch-tutorial
#iOSDeveloper #Xcode #SwiftLang #Foundation
STATUS: The AMA is over.
Hi there,
We really appreciate all the fantastic questions that were asked at the Consensus AMA, the Chain Key Technology AMA, and the Execution Layer AMA. To continue the series, we have an AMA with the Language Team that is responsible for Motoko among other things.
Motoko is a brand new programming language which is specifically tailored to the Internet Computer. Some of the Motivation and Goals for Motoko were:
- High-level language for programming IC applications
- Simple ("K.I.S.S.") design and familiar syntax for average programmers
- Good and convenient support for actor model
- Good fit for underlying Wasm and IC execution model
- Anticipate future extensions to Wasm where possible
Motoko was open sourced this week, be sure to check it out! There is also a ton of knowledge about WebAssembly (Wasm) on the team, which is the binary instruction format of choice for the IC.
RELEVANT DOCUMENTATION
- The Motoko Repository - https://github.com/dfinity/motoko#readme
- An introduction to Motoko - https://stackoverflow.blog/2020/08/24/motoko-the-language-that-turns-the-web-into-a-computer/
- The Motoko documentation - https://sdk.dfinity.org/docs/language-guide/motoko.html
- Motoko examples repository - https://github.com/dfinity/examples/tree/master/motoko
- Motoko: A Programming Language for Building Directly on the Internet - https://www.youtube.com/watch?v=4eSceDOS-Ms
ABOUT US
Andreas Rossberg ( u/rossberg_DFN ) - Andreas joined Dfinity in late 2017. He is the lead designer of Motoko and co-designer and spec author for WebAssembly.
Claudio Russo ( u/Claudio_DFN ) - Claudio joined DFINITY in 2018 to work on languages and compilers, before Motoko was a thing. He started the impleme
... keep reading on reddit ➡
Javascript callbacks are one of the most important concepts to understand. I never knew the importance of understanding them until I started trying to learn Promises and Async/Await which aim to replace and solve problems with callbacks.
I had trouble understanding promises, I kept asking myself, “Where and why would I use this?”. I would read an article talking about using Promises with Fetch API I would get it in that context but I kept wondering about the situation I would create a Promise for my code.
I must mention I also had a very poor understanding of asynchronous programming in JavaScript, so I was set up to fail. Learning more about asynchronous programming lead me to callbacks which gave me an aha moment, the light bulb went on. I finally understood the hype about Promises and Async/Await.
In this article, We are going to take a look at the difference between synchronous and asynchronous programming in JavaScript. We will then proceed to learn about the importance of callbacks, creating callbacks, and finally, we will cover about callback hell.
By the end of this tutorial, you will understand:
- Synchronous and asynchronous behavior in JavaScript
- Why and when callbacks are needed
- How to create callbacks.
- Callback hell
I believe the knowledge you will gain from reading this tutorial will be an invaluable prerequisite to learning Promises and Async/Await.
Link to the full article: https://www.stanleyulili.com/javascript/asynchronous-programming-with-callbacks-in-javascript/
