I'm offering up a #solongagosunday pick, encouraging everyone to give Catherine a high five for her regex cheatsheet posted in January. I use regex all the time now, but it took me forever to get the hang of and her post was super helpful for me.
Also, I would kick myself if I did not include an honorable mention of Emma Wedekind's regex cheatsheet from February, because it's pretty badass:
Long ago super welcome! If anything we need to be better at re-surfacing the goodies.
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.