Why would you want to convert an object to boolean when used in a boolean context?

Question

I understand that !! converts anything to a boolean value, but why would you want to do this:

if (!!someObject) { ... }

When you can just do:

if (someObject) { ... }

EDIT:

Just to clarify, I'm simply asking why you would write code like in the first example, rather than that in the second example. Are there any practical differences?

Answer 1

There isn't a significant different between them. So, most likely, it's personal preference or to be explicit about the intent.

Though, it's possibly from an uncertainty/misunderstanding of how or when values are treated as a booleans.

But, both if statements and Logical NOT operators use the internal ToBoolean():

If ToBoolean(GetValue(exprRef)) is true, [...]

Let oldValue be ToBoolean(GetValue(expr))

The operators just add 2 more rounds of ToBoolean() with negation on top of the if statement's own use. But, the result is the same.