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It really does. The most helpful resource I found for Flexbox is a cheatsheet from css-tricks.com.

That was helpful for me too. I also found Flexy Boxes to be useful: http://the-echoplex.net/flexyboxes/

This one from Philip Walton is quite handy too: https://philipwalton.github.io/solved-by-flexbox/ (The six examples in the showcase are all very common problems, and well-solved with Flexbox.)

yeah this is my go to when I can't remember some little part of the flex box spec.