Question

So I want to call function B in function A, but function B is fully declared after function A. I know that in c++ we’d use function prototypes on B, but what about javascript?

code:

markerArray = function() {
    // some code here
    this.array = [];
    this.clearArray = function() {
        for(var i = 0; i<this.getLength(); i++)
            // for loop code
    }
    this.getLength = function() {
        return this.array.length;
    }
    // some code here
}

these reason why I put this.getLength below is mainly because my coding style/structure is more readable this way

Answer 1

Not a problem. Function declarations are hoisted to the top of the enclosing variable environment, so they do not need to be declared in order.

A();

function A() {
    B();
}

function B() {
    alert('B was called');
}

If you meant something else, you’ll need to explain it in your question.