如何访问多级对象数组？

Question

By looking at the " Array " image, how can I access all levels of this array?

I tried doing a foreach but this only allows me to access to the first object, I can't acces the second object filled with strings.

    for (var key in result)
  {
     if (result.hasOwnProperty(key))
        {
          console.log(key, result[key]);

              for(var item in result[key])
                {
                  console.log(item);
                 }
          }
}

I also tried:

result[key[item]]

But it appears to be undifined.

I know it's easy to access all elements by the name, but the names change constantly, so the solution should be dynamic.

I added the Demo on the comments to see behavior.

Answer 1

Object.keys(obj) returns an array of the keys in obj .

 var obj = { a: 1, b: 2, m: 3, x: 4, y: 5, z: 6 } //get all the keys in an array: var keys = Object.keys(obj) console.log("keys: " + keys); //iterate through the object by its keys: for (var i = 0; i < keys.length; i++){ console.log("key " + keys[i] + " has value " + obj[keys[i]]); } 

Update based on your comment

I think you're asking to apply this solution to an arbitrary-depth object. My solution would be to wrap the previous trick in a function and call it recursively if there are nested objects:

 var obj = { a: {foo:"bar",foof:"barf"}, b: 2, m: 3, x: {baz:{really:{more:{objects: "yeah, there could be a lot"}}}}, y: 5, z: 6 } function getKeysDeep(obj,prefix){ //get all the keys in an array: var keys = Object.keys(obj) //console.log(prefix + "keys: " + keys); //iterate through the object by its keys: for (var i = 0; i < keys.length; i++){ if (obj[keys[i]] !== null && typeof obj[keys[i]] === 'object') { console.log("key " + keys[i] + "'s value is an object"); getKeysDeep(obj[keys[i]],prefix + keys[i] + ": "); } else { console.log(prefix + "key " + keys[i] + " has value " + obj[keys[i]]); } } } getKeysDeep(obj,"") 

Answer 2

This loop worked too!

Object.keys(result).forEach(function (key) {
      console.log(result[key]);
      var test = result[key];
      Object.keys(test).forEach(function (key) {
         console.log(test[key]);
         var testTwo = test[key];
          Object.keys(testTwo).forEach(function (key) {
            console.log(testTwo[key]);
            var testThree = testTwo[key];
          });
       });
    });

But @nvioli answer is more accurate.