A month or so ago, I was trying to split a string, but no matter what that string had in it, the split method just returned
undefined. I spent 2 hours trying to figure out why I couldn't get it to work. I finally posted on a Slack team asking why it wasn't working. Turns out, I was using square brackets instead of parentheses for no discernible reason. It was pretty embarrassing, especially considering how long I've been writing JS.