Quickly iterate an array with objects.

ArrayOfObjectsIterator.js

(function(){
    var data = {
       "GetResult":[
          {
             
             "ID":1,
             "width":150,
             "height":50
          },
           {
             
             "ID":2,
             "width":5,
             "height":150
          },
          {
             
             "ID":3,
             "width":75,
             "height":30
          },
           {
             
             "ID":4,
             "width":25,
             "height":250
          }
       ]
    }

    var results = 'GetResult'

    // Iterate JSON data
    var len = data[results].length;
    for (var j = 0; j < len; j++) {
        var info = data[results][j];
        console.log(info.width);
    }
})();

why not just use a for . . . in loop here? That's what it's for, looping over objects.

So line 35 would be like for (info in data[results])

The object 'data' contains an array of objects in the property 'GetResult'. I thought that was the fastest way to loop it? After I stubbed this out I found later the data was an object (with no array of objects like here) so we went with your suggestion with the for . . . in loop.

Totally confused: looping over an array of objects w/ for ... in should loop over the objects. Looping over an object with for . . . in should give you each of its properties.