chartd makes it easy to include charts (either png or svg) on your web site, by just passing parameters in the URL of an img tag. For simple charts, this will be easy-peasy to automate. Of course, the downside is the same as for any other time that you let a third-party service have responsibility for your content — what if they shut down the service?
If you ever get confused about inner and outer joins in SQL, this is very useful.
There are some pretty good pointers in this list of resources. Highlights for me are “Callback convention – with Promise Support” and “The Twelve-Factor Application”.
“Components is a library of shareable, reusable patterns for WordPress themes. Instead of starting from scratch, mix and match from a collection of pre-made components to build your own custom starter theme.” Online tool from Automattic which can generate a variety of starter themes based on Underscores and Components, ready for you to customize.
A coworker wanted to run two separate copies of Slack on the Mac, so that he could watch updates from two different Teams at the same time. Personally, I just use the native multi-Team support in the app, but I can see how this would be useful. One answer is to use this command from the Terminal:
open -n /Applications/Slack.app
Scottish mathematicians are cool. Also, this led me to look up Lattice Multiplication, which is being taught in Common Core. But I think the Genaille-Lucas rulers were probably the coolest bit. Pre-calculate smaller pieces of a multiplication/division problem, use a little modulus magic, and large problems become a breeze.
TL;DR: If you use the php-ssh2 extension for your WordPress core / theme / plugin updates, you might want to wait a little longer before upgrading to PHP 7.