Question

This is a really basic question really just to satisfy my curiosity, but is there a way to do something like this:

if(obj !instanceof Array) {
    //The object is not an instance of Array
} else {
    //The object is an instance of Array
}

The key here being able to use the NOT ! in front of instance. Usually the way I have to set this up is like this:

if(obj instanceof Array) {
    //Do nothing here
} else {
    //The object is not an instance of Array
    //Perform actions!
}

And its a little annoying to have to create an else statement when I simply want to know if the object is a specific type.

Answer 1

Enclose in parentheses and negate on the outside.

if(!(obj instanceof Array)) {
    //...
}

In this case, the order of precedence is important.
See: Operator Precedence.

The ! operator precedes the instanceof operator.