如何检查一个json是否包含

Question

I have a javascript array containing JSON Object like this:-

var data :[{
         name:"ABC",
         categories:[{
                     name:"XYZ",
                     categories:[{
                           .
                            .
                             .
                              N
                        }]
              }]
}]

I want to iterator in this array and wanna check whether categories[] present or not and Categories[] have any value or not , If yes then insert the data inside it

EG:

var mydata:[];
 mydata.push({name:"MNP",Categories:[]});

I want to insert this data inside categories

Answer 1

// this is a sample object containing 1 element is text and one element is an array
var object = {smapleA: 'some text', sampleB : ['stringArray']};

// init a var to save the status (intial it must be false)
var containsArray = false;

// go over each element in the object with this loop definition
for(let key in object){
   // for be clean check if object.key realy exists 
   if(object.hasOwnProperty(key){

     // here you check if the current element is an Array
     if(Array.isArray(object[key])){

       // set containsArray variable to true
       containsArray = true;
     }
   }
}

console.log(containsArray);