Array.prototype.remove and Ext.apply - wtf ??? (bug with config of type of Array)

Due to some reasons I use this code:

Code:

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var config = ['a', 'b'];
Ext.apply(o, config);

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Ext.apply , defined in ext-base.js looks like:

Code:

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Ext.apply = function(o, c, defaults){
    // no "this" reference for friendly out of scope calls
    if(defaults){
        Ext.apply(o, defaults);
    }
    if(o && c && typeof c == 'object'){
        for(var p in c){
            o[p] = c[p];
        }
    }
    return o;
};

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Ok, as we see, it MUST work with array (typeof array is 'object'), but wait, Ext has defined such stupid prototype methods:

Code:

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Ext.applyIf(Array.prototype, {
    /**
    * Checks whether or not the specified object exists in the array.
    * @param {Object} o The object to check for
    * @param {Number} from (Optional) The index at which to begin the search
    * @return {Number} The index of o in the array (or -1 if it is not found)
    */
    indexOf : function(o, from){
        var len = this.length;
        from = from || 0;
        from += (from < 0) ? len : 0;
        for (; from < len; ++from){
            if(this[from] === o){
                return from;
            }
        }
        return -1;
    },


    /**
    * Removes the specified object from the array.  If the object is not found nothing happens.
    * @param {Object} o The object to remove
    * @return {Array} this array
    */
    remove : function(o){
        var index = this.indexOf(o);
        if(index != -1){
            this.splice(index, 1);
        }
        return this;
    }
});

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Nice, remove() is enumerable! This is great, because of this brokes all for (var p in o) iterations !

Ext developers are happy, because of they can call [0,1].remove(0) instead of [0,1].splice(0,1).
But I am sad because of my server-side provides component states as arrays, not objects.

Is ExtJS 3 supported? Where is bug-tracker ? Can someone offer workaround, please (I am new to javascript and especially ExtJS)?

Ext JS 3 is supported if you were a support subscriber, any updates are only available to support subscribers since Ext JS 4 is the current version.

No, I am not subscriber. I am developer of free extras for free CMS (MODx Revolution). So, public version will stay buggy? Fine...

hasOwnProperty check brokes Ext.grid.RowExpander.
Object.defineProperty doesnt work in IE6-8.

Very bad...

Used such workaround:

Code:

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Object.defineProperty(Array.prototype, "remove", {
    value : function(o){
        var index = this.indexOf(o);
        if(index != -1){
            this.splice(index, 1);
        }
        return this;
    },
    enumerable : false
});

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This works at least in modern browsers.