javascript - How do I get number of arrays from an object -


i have json webservice in following format. 

 { name:['a','b'], name:['cd','ef'], age:{...}, address:{...} }.

here have 2 arrays & 2 objects inside object , these (array & objects) numbers may vary. need is, how can number of arrays alone main object? there may exist way solve problem need code in .js (javascript file).


when tried: 

object.keys(mainobject).length;

it gives total count of array + objects in main object.

var data = { name:['a','b'], othername:['cd','ef'], age:{a: 12}, address:{a: 'asdf'} }  var numberofarrays = object.keys(data).filter(function(key) {     return data[key] instanceof array; //or array.isarray(data[key]) if array created in frame }).length;  alert(numberofarrays);

note: won't work in older versions of ie

jsfiddle

to make work browsers don't support it, use shims mdn:

object.keys

array.filter


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