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Eamonn Cottrell, Web Design and Development

I write about web development, design and tooling from a solopreneur's perspective.

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Latest posts

How to Make a Lightbox in a Google Sheet

this originally appeared on my free weekly newsletter, Got Sheet. In this article and accompanying video, I'll show you two ways to create a lightbox effect in a spreadsheet. The first will trigger the image to be displayed in a large area in the she...

6 Ways to number in Excel

Since last we spoke I’ve been recording several new long and short form videos. Check out the YouTube Channel if you haven’t. I’ve also wrapped up training for a marathon I’ll be racing on March 3rd… 🤞🤞 Now to the sheets… Do you ever feel lost in E...

Google Sheets Tutorial – How to Enable Multiple Selection Data Validation Using Apps Script

Originally published for freeCodeCamp In this article I will show you how to allow for multiple items to be selected using the drop-down data validation feature in Google Sheets. Here's the Google Sheet we'll use for the example. You can make a copy...

Excel Tutorial – How to Clean Data with the TRIM() and CLEAN() Functions

Originally published for freeCodeCamp Without clean data, your spreadsheet is knocking on death's door. In this tutorial, I will show you two fast ways to clean up the data in your Excel or Google Sheets spreadsheet. When dealing with data sets, esp...

Accounting Number Format in Excel – How to Apply it to Selected Cells

Originally published for freeCodeCamp In this article I will show you how to format cells in Microsoft Excel. We'll be looking particularly at the Accounting format for cells with numbers. At the end of the article I'll give you two bonuses: a short...

How to Clear Formatting in Excel – Remove Format From a Cell

Originally published for freeCodeCamp In this article I will show you how to clear formatting from a cell in Excel. If you want the quick and dirty version, it's first up and will require you to simply click a couple times. If you want to become a s...

I Made 📃Goals and 💲Money This Year | 👉Dev Retro 2022

📈 Spreadsheets and Goals I found it immensely helpful to create a spreadsheet outlining some of my goals this past year. I'll reference it throughout this article, and here's the link if you'd like to check out the View Only version. This year has ...

What is a ROM? ROM Price and Cost Estimate

Originally published for freeCodecamp ROM stands for Rough Order of Magnitude. It is a project management guideline to determine the estimated range of costs for a project. This article will explain: Who should use a ROM When to use a ROM How to ...

How to Calculate Percentage Differences Between Two Numbers in Excel - Cell Percentage Change Tutorial

Originally published for freeCodeCamp Spreadsheets are powerful and awesome. 💪 In this tutorial I will show you four ways to find the percentage difference between two numbers in Excel. I'll also show you how to use custom functions in Google Sheet...

Email Alias – How to Set Up a Professional Email for Free

Originally published for freeCodeCamp I needed to log in to AWS. But my main email address was rejected. I'd done this in the past and the account had been irreversibly deleted. No reset option – just a message saying the account was permanently del...

Animate SVGs for GitHub READMEs

Holy backslash! We can program SVG animations directly within the file! 😲 What's an SVG? From Wikipedia: SVGs are scalable vector graphics. They are an XML-based vector image format for defining 2d graphics that supports interactivity and animation...

Build an Open Source CSS Library

Meet unMove: my latest project where I built my first open-source library using vanilla CSS, GitHub Projects, Issues, tags and releases, semantic versioning and jsDelivr. I set out building this to better learn good project management and the ins & ...

📚 Two Inspiring Technology Companies 💻

No other online platforms have had as big an impact in my life as Khan Academy && freeCodeCamp. I'm forever grateful to the wealth of knowledge they provide, and their missions: Our mission is to provide a free, world‑class education for anyone, any...

Journey to the Center of the Code

Beginning and re-beginning My first experiences with coding were in middle school. I didn't quite realize it at the time, but I was writing rudimentary programs on our graphing calculators and having a ball programing conditional statements in a choo...

Google Sheets Tutorial – How to Use Regex and VLOOKUP to Display Images from Google Drive

Originally published on freeCodeCamp. Images make many things better. And Google Sheets is one of those things. The easiest way to add an image to Google Sheets is to simply insert one into your sheet. But if you have added many images this way, you...

How to Check for Null in Javascript

Sometimes you've gotta check to make sure that nothing isn't actually...nothing. 😲❗❓ In JavaScript, null is a primitive type intentionally containing the value of null. Undefined is a primitive type and represents a variable you declare without init...

JavaScript String to Date - Date Parsing in JS

This article originally appeared on freeCodeCamp here. Dates are a pretty fundamental concept. We use them all the time. And computers use them all the time. But parsing dates using JavaScript can be a little...well, interesting. In this article, we...

More PostgreSQL Commands for freeCodeCamp Projects

More Commands 🌟 We're creating more bash files to do some of the heavy lifting and querying for us. Here are a list of commands used in Learn SQL by Building a Student Database: Part 2. They'll be useful to (definitely) my future self and (hopefull...

How to Query Data in Google Sheets

This article appeared first on freeCodeCamp's news publication. I built a spreadsheet and wanted to display some of the data in a small table which would update based on the day of the week. After some digging, querying seemed the best option to pul...

Learn SQL By Building A Student Database

Back to the SSQL 🎶 I'm glad to be back in SQL for this course. Bash was great, but let's make some more databases! https://media.giphy.com/media/Rm1p7xp3Odl2o/giphy.gif If you, like me, need a cheat sheet for some of the PostgreSQL commands from the...