Override the Equivalence Comparison in Javascript

Question

Is it possible to override the equivalence comparison in Javascript?

The closest I have gotten to a solution is by defining the valueOf function and invoking valueOf

Answer 1

If it's full object comparison you're looking for then you might want to use something similar to this.

/*
    Object.equals

    Desc:       Compares an object's properties with another's, return true if the objects
                are identical.
    params:
        obj = Object for comparison
*/
Object.prototype.equals = function(obj)
{

    /*Make sure the object is of the same type as this*/
    if(typeof obj != typeof this)
        return false;

    /*Iterate through the properties of this object looking for a discrepancy between this and obj*/
    for(var property in this)
    {

        /*Return false if obj doesn't have the property or if its value doesn't match this' value*/
        if(typeof obj[property] == "undefined")
            return false;   
        if(obj[property] != this[property])
            return false;
    }

    /*Object's properties are equivalent */
    return true;
}