Human beings love challenges, but only if they are within the optimal zone of difficulty.


Facebook’s algorithms are able to recognize your friends’ faces after they have been tagged only a few times. It’s pretty amazing technology — Facebook can recognize faces with 98% accuracy which is pretty much as good as humans can do!


Used in the right way animation can improve an interface and enhance UX, sometimes even making it magical.


A lot of the complexities involved in actually building a database engine aren’t related to the core features that you want to have. They are related to what looks like peripheral concerns. Backup / restore is an excellent example of that.


123456, password, rootkit, 111111, 12345678, qwerty, 123456789, 123123, qwertyui, letmein, 12345, 1234, abc123, dvcfghyt, 0, r00tk1t, ìîñêâà, 1234567, 1234567890, 123, fuckyou, 11111111, master, aaaaaa, 1qaz2wsx


…is, of course, naming. Not just naming variables or new technologies. Oh no. We can’t even agree on names for basic concepts.


Common Table Expression (CTE) is a bit of a misnomer because it's not a table but rather a query. It straightforward to declare and easy to use with another queries. If you're not familiar with CTE this is worth a quick look.


A JavaScript Promise represents the result of an operation that hasn't been completed yet, but will at some undetermined point in the future. An example of such an operation is a network request. When we fetch data from some source, for example an API, there is no way for us to absolutely determine when the response will be received.