How to check if a JSON response element is an array?

Question

I am receiving the next JSON response

    {     "timetables":[         {"id":87,"content":"B","language":"English","code":"en"},                                                         {"id":87,"content":"a","language":"Castellano","code":"es"}],     "id":6,     "address":"C/Maestro José"     } 

I would like to achieve the next pseudo code functionality

for(var i in json) {                 if(json[i]  is Array) {     // Iterate the array and do stuff     } else {     // Do another thing     } } 

Any idea?

Answer 1

There are other methods but, to my knowledge, this is the most reliable:

function isArray(what) {     return Object.prototype.toString.call(what) === '[object Array]'; } 

So, to apply it to your code:

for(var i in json) {                         if(isArray(json[i])) {     // Iterate the array and do stuff     } else {     // Do another thing     } }