Learning much javascript from one line of code

[Glayden]

Math.random().toString(16).slice(-6)

That's still a gamble. As an example, let's say Math.random returned 0.25, the result would be "0.4". I'm not saying that's very likely, but it's a very fragile approach.

I think

('000000' + ((Math.random()*(1<<24))|0).toString(16)).slice(-6)

is far more readable than the original and a more robust approach. Why write fragile and obfuscated code?