Question

181

Difference in JSON objects using Javascript/JQuery

rated 0 times [ 187] [ 6] / answers: 1 / hits: 26000 / 15 Years ago, wed, july 29, 2009, 12:00:00

I have two JSON objects in Javascript, identical except for the numerical values. It looks like this:

var data = {

  eth0:{Tx:4136675,Rx:13232319},

  eth1:{Tx:4,Rx:0},

  lo:{Tx:471290,Rx:471290}

}



var old = {

  eth0:{Tx:4136575,Rx:13232219},

  eth1:{Tx:4,Rx:0},

  lo:{Tx:471290,Rx:471290}

}

One object called data has the current values, another object called old has the same values from 1 second ago. I'd like to output a JSON object with only the change in values so I can calculate data throughput on the network interfaces.

var throughput = {

  eth0:{Tx:100,Rx:100},

  eth1:{Tx:0,Rx:0},

  lo:{Tx:0,Rx:0}

}

I'm not sure how to go about traversing the JSON data - it could be for any number of interfaces.

Can anyone please lend me a hand? Thanks in advance

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rafael

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3 Years ago

answered 15 Years ago hallie · Accepted Answer

You can iterate through the parent and child object properties:

var diff = {};

for(var p in data){

  if (old.hasOwnProperty(p) && typeof(data[p]) == 'object'){

    diff[p] = {};

    for(var i in data[p]){

      if (old[p].hasOwnProperty(i)){

        diff[p][i] = data[p][i] - old[p][i];

      }

    }

  }

}