Category Archives: JavaScript

A Quick Look At The Dart Language

Posted on July 15, 2020 by jamesdmccaffrey

The Dart programming language has created in 2011. I hadn’t looked at Dart in a long time so I figured I’d install it and run a “Hello World” program to refresh my memory. Dart was intended to be a replacement … Continue reading →

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Matrix Inverse with JavaScript

Posted on April 24, 2020 by jamesdmccaffrey

I regularly use several programming languages. For the past few months I’ve been working mostly with C#. It’s important for me to practice with the other programming languages I use so I don’t get rusty. So, I decided to port … Continue reading →

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Reading and Writing Files Using Node.js

Posted on May 13, 2019 by jamesdmccaffrey

For the past couple of months I’ve been exploring the idea of creating a simple neural network (single hidden layer only) library using JavaScript. To implement a neural network library, it’s necessary to be able to read and write files. … Continue reading →

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Computing the Inverse of Matrix

Posted on April 30, 2019 by jamesdmccaffrey

The inverse of a matrix is used in many, many machine learning algorithms. In ordinary mathematics, the inverse of a number n is a number ni so that n * ni = 1. For example, if n = 5 the … Continue reading →

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Investigating Neural Network Dropout Using JavaScript

Posted on April 29, 2019 by jamesdmccaffrey

I have implemented quite a few different types of neural networks using several different programming languages. The other day I took a close look at implementing a neural network with dropout training, using JavaScript. Dropout is a technique that is … Continue reading →

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Neural Network Momentum using JavaScript

Posted on April 19, 2019 by jamesdmccaffrey

I’ve been slowly but surely implementing core neural network functionality using the JavaScript language. My most recent exploration was modifying a back-propagation function so that it used momentum. The motivation is to speed up training. The idea is best explained … Continue reading →

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Selecting n Random Items Using JavaScript

Posted on April 16, 2019 by jamesdmccaffrey

Even though I’m not a huge fan of JavaScript, I like the language more than most of my engineering / developer colleagues. Just for fun I decided to code up a function that selects n random integers from N. For … Continue reading →

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Neural Network Back-Propagation Using JavaScript

Posted on April 10, 2019 by jamesdmccaffrey

For the past few months, I’ve been slowly exploring the idea of implementing a neural network using raw (no libraries) JavaScript. Once every few days, on my lunch break, I’d design and code a few modules. This morning I made … Continue reading →

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Neural Network Input-Output Using JavaScript

Posted on April 5, 2019 by jamesdmccaffrey

Over the past few weeks I’ve been experimenting with the idea of implementing a basic single-hidden layer neural network using the JavaScript language. The first, obvious question is, “Why?” There are three reasons for this folly. First, neural network code … Continue reading →

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Quicksort Implemented Using JavaScript

Posted on March 25, 2019 by jamesdmccaffrey

My dog is responsible for this blog post. I’ll explain what that means in a moment. The quicksort algorithm is generally considered the best all-purpose technique to sort an array. Most programming languages have a built-in library that has a … Continue reading →

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