Javascript object prototype error

Question

I need new method for the object. And I'm trying to create it:

Object.prototype.getByPath = function (path, other) {
    for (var i=0, obj=this, path = path.split('.'), len=path.length; i<len; i++) {
        obj = obj[path[i]];
    }
    return (typeof obj === "undefined" || obj == "") ? other : obj;
}

But this code return an error (Conflict with another js file!):

Uncaught TypeError: Object function (path, other) {

Another js file start with this line:

(function(){function d(a,b){
    try {
      for (var c in b)
        Object.defineProperty(a.prototype, c, {value:b[c],enumerable:!1})
    } catch(d) {
      a.prototype = b
    }
}());

How can I solve this error?

Are you sure you want to add to the Object prototype?? This will add the getByPath method to all objects — jasonscript
– jasonscript, Commented Nov 25, 2013 at 6:15

Jayantha Lal Sirisena · Accepted Answer · 2013-11-25 06:21:54Z

2

Conflict with another js file!

Yes it happens because it is adding the new method to all the objects , Instead try to make your own base object for all your clients side javascript objects,

var yourBaseObj={
  getByPath :function (path, other) {
    for (var i=0, obj=this, path = path.split('.'), len=path.length; i<len; i++) {
        obj = obj[path[i]];
    }
    return (typeof obj === "undefined" || obj == "") ? other : obj;
  }
}

And then you it for other objects ,

function YourNewObject(){

}
YourNewObject.prototype=yourBaseObj

answered Nov 25, 2013 at 6:21

Jayantha Lal Sirisena

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1 Comment

RobG Over a year ago

+1, but also because the "other library" has not taken precautions against inherited properties when using for..in.

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