Compare two objects for equality

Hi, 

I have two javascript objects I want to compare them whether they are equal or not how will I do so ?

shawn said:

 

Hi, 

I have two javascript objects I want to compare them whether they are equal or not how will I do so ?

 

Hi Shaw,

Checkout this link it might help you out.

http://stackoverflow.com/questions/1068834/object-comparison-in-javascript

http://stackoverflow.com/questions/27030/comparing-arrays-of-objects-in-javascript

Thanks,

Sumit Arora

From Definitive Guide

// This mixin class defines an equals() method that can compare
// simple objects for equality.
function GenericEquals() {}
GenericEquals.prototype.equals = function(that) {
    if (this == that) return true;
    
    // this and that are equal only if this has all the properties of 
    // that and doesn't have any additional properties
    // Note that we don't do deep comparison.  Property values
    // must be === to each other.  So properties that refer to objects
    // must refer to the same object, not objects that are equals()
    var propsInThat = 0;
    for(var name in that) {
        propsInThat++;
        if (this[name] !== that[name]) return false;
    }

    // Now make sure that this object doesn't have additional props
    var propsInThis = 0;
    for(name in this) propsInThis++;
    
    // If this has additional properties then they are not equal
    if (propsInThis != propsInThat) return false;

    // The two objects appear to be equal.
    return true;
}