从数组的json对象访问动态键

Question

I need to access keys of a json object which was created dynamically . The array structure is:

self.arrayObj : Array[2]
  >0:Object
   >Display1
    ->InnerObjects
   >__proto
  >1:Object
   >Display2
    -->InnerObjects

Key is "Display1" and value is object. This key is dynamic and not fixed . How can I access the Key string from array above.

The output I am expecting as : "Display1" and "Display2"

Answer 1

try this

var keys = [];//final output of all key names

arrayObj.forEach(function(val){
  keys.concat(Object.keys(val));
});

keys now has all the dynamic property names.

Answer 2

Using map you can do:

 var arrayObj = [{'Display1': {'InnerObjects': {}}}, {'Display2': {'InnerObjects': {}}}]; var result = arrayObj.map(function(val, index) { return Object.keys(val)[0]; }); document.write('arrayObj keys: ' + result.toString());