[jerryszczerry]

I guess if learning 90% of something takes 90 minutes, the remaining 10% will take 10 years.

[hamandcheese]

Similar to the 90-90 rule: https://en.wikipedia.org/wiki/Ninety-ninety_rule

[scalesolved]

And that is where problems start with keen and eager junior developers who think by knowing the 90% they really know the 100%.

[sotojuan]

Unfortunately here in HN we constantly upvote those junior developer's Medium posts.

[jacquesm]

Blinking LED now in Node.js.

[EToS]

Absolutely. Not using mutable variables as default arguments = 91%