[debaserab2]

Then by that principle you'd want to use !! since casting via function or constructor differs more between languages.

[WalterSear]

What it looks like in other languages is only minorly relevant to its obviousness and readability.

[debaserab2]

I don't see the argument that Boolean(val) "reads easier" than !! as long as you know what !! does.

[goatlover]

Wouldn't any programmer recognize that Boolean(val) is a cast to a True/False value that's most likely an object, given the uppercase?

[inimino]

Perhaps, but it's a primitive, not an object.