javascript - 比较对象中的元素

Question

我正在开发一个将结果保存到 json 中的抓取工具，如下所示:

{"Productos" : [
   {"Title":"Grabador de voz ISD1932","Results": [
      {"Stock":1,"Price":11.4,"Fecha":"18-8-2014:3:36"},
      {"Stock":1,"Price":12.4,"Fecha":"18-8-2014:3:38"},
      {"Stock":1,"Price":12.4,"Fecha":"19-8-2014:0:40"},
      {"Stock":1,"Price":12.4,"Fecha":"19-8-2014:21:46"},
      {"Stock":1,"Price":12.4,"Fecha":"21-8-2014:22:4"},
      {"Stock":1,"Price":12.4,"Fecha":"22-8-2014:0:40"},
      {"Stock":1,"Price":12.4,"Fecha":"23-8-2014:0:48"},
      {"Stock":1,"Price":12.4,"Fecha":"23-8-2014:13:56"},
      {"Stock":1,"Price":12.4,"Fecha":"23-8-2014:13:56"},
      {"Stock":1,"Price":12.4,"Fecha":"23-8-2014:13:56"},
      {"Stock":1,"Price":12.4,"Fecha":"23-8-2014:13:56"}, 
      {"Stock":1,"Price":12.4,"Fecha":"23-8-2014:13:56"},
      {"Stock":1,"Price":12.4,"Fecha":"23-8-2014:13:56"}],
    "id":"4a1e90d7-e578-4bd5-b888-38c7bbfb4af5"}]}

所以结果中的第一个元素是:

{"Stock":1,"Price":11.4,"Fecha":"18-8-2014:3:36"} 

第二个是

{"Stock":1,"Price":12.4,"Fecha":"18-8-2014:3:38"} 

第三个是

{"Stock":1,"Price":12.4,"Fecha":"19-8-2014:0:40"} and so.

每次我抓取网页时，它都会添加一个元素。

我想做一个清洁器，如果库存和价格等于前一个元素，但只删除前一个元素，不包括日期。

在这个例子中，由于第三个元素等于第二个，我想删除它。如果 4rth 等于 3rd，则将其删除，依此类推。

Answer 1

您可以使用 array.filter 轻松做到这一点:

var data = ...;

for(var i = 0 ; i < data.Productos.length ; i++) {
    var p = data.Productos[i];
    p.Results = p.Results.filter(function(o, i, a) {
        return i == 0 || !(o.Stock == a[i - 1].Stock && o.Price == a[i - 1].Price);
    });
}