How to get length from array with curly brackets

Question

I'm making an ajax call and the response I get is something like this:

   Object {
        Monday noon: Array[4], 
        Tuesday morning: Array[2], 
        Friday noon: Array[3], 
        Sunday: Array[1]
    }

I would like to do something like:

    response.length

But what i get back is undefined

Any idea how can i get the length inside of the Object array?

Another question is: How could I get to the array of Monday noon: Array[4] ? Any help or tutorial link will be appreciated.

Answer 1

If you want the number of keys in the object use:

var length = Object.keys(obj).length;

If you need a Object.keys polyfill:

if (!('keys' in Object.prototype)) {
  Object.keys = function (obj) {
    var arr = [], prop;
    if (util.toType(obj) === 'object') {
      for (prop in obj) {
        if (obj.hasOwnProperty(prop)) {
          arr.push(prop);
        }
      }
    }
    return arr;
  };
}

Answer 2

Objects don't have a length property. You can loop through the properties and increment a counter:

var counter = 0;
for (var prop in obj) {
  if(obj.hasOwnProperty(prop)){
    counter++;
  }
}

Answer 3

var len = 0;
for(var prop in response){
    if(response.hasOwnProperty(prop))
        len++;
}