In the most recent instance, I had need of a negative assertion in a regular expression. I came across this page that pointed me in the right direction. Specifically: x(?!y).
Then this page reminded me of the need for the g flag on regular expressions to match all occurences within a string. Again, something I should have known, but I was apparently in a rush.
I was having trouble retrieving numeric values from cookies until I came across this article. It doesn’t specifically mention the issue, but it does include the eval necessary around the retrieved cookie that will turn it into a numeric value if needed.
Then I ran into a requirement for a unique date value, and I didn’t want to use a lengthy date. I liked the idea of just a single number. So I found this piece on the Chronological Julian Date and the Chronological Modified Julian Date. Perfect and easy to calculate.
I also could not have accomplished my tasks without using techniques presented here (specifically the action method of the form) for sending forms to different places when different paths are taken within the code.