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AJAX (Asynchronous Javascript And XML) is a popular technique for creating interactive websites, allowing web content to be updated asynchronously by exchanging small amounts of data with the server behind the scenes.

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Rails controller method to accept one rating per IP address via AJAX

konkurrencer.konkurrencer.rating_score += params[:kon][:ratings].to_i @konkurrencer.konkurrencer.ratings += 1 @konkurrencer.save else // render error message end render :nothing => true end end My AJAX