On Sun, Feb 20, 2011 at 1:35 PM, Baris Bikmaz <[email protected]> wrote:
> [...] And I prefer not to write the properties again after checking them so a
> quite similar approach were to write a method
> like that: Object.prototype.hasCustomProperty = function( sProperty ) { [...] 
> }

It works until you start using any kind of third party code, in which
case you probably break them.

http://stackoverflow.com/questions/5056306/jquery-extending-object-prototype-c-replace-is-not-a-function/

- Balázs

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