We could classify objects of javascript or JSON ones to different groups based on their attributes' values. I modified original example as below coffeescript code from Reference link. Suppose you have an array-variable of JSON objects and a variable of Object, and you want to classify or group them based on values of their date attributes. warehouseOfClassifiedJSONObj = new Object(); arrayOfJSONObj = [ {name:"taro", date:"1996-01-01", total_average_price: 50}, {name: "flower", date: