How to get all properties values of a Javascript O

Question

If there is an Javascript object:

var objects={...};

Suppose, it has more than 50 properties, without knowing the property names (that's without knowing the 'keys') how to get each property value in a loop?

Answer 1

If you have access to Underscore.js, you can use the _.values function like this:

_.values({one : 1, two : 2, three : 3}); // return [1, 2, 3]

Answer 2

I realize I'm a little late but here's a shim for the new firefox 47 Object.values method

Object.prototype.values = Object.prototype.values || function(obj) {
  return this.keys(obj).map(function(key){
    return obj[key];
  });
};

Answer 3

Here's a function similar to PHP's array_values()

function array_values(input) {
  var output = [], key = '';
  for ( key in input ) { output[output.length] = input[key]; }
  return output;
}

Here's how to get the object's values if you're using ES6 or higher:

Array.from(values(obj));

Answer 4

Object.entries do it in better way.

  var dataObject = {"a":{"title":"shop"}, "b":{"title":"home"}}
 
   Object.entries(dataObject).map(itemArray => { 
     console.log("key=", itemArray[0], "value=", itemArray[1])
  })

Answer 5

If you really want an array of Values, I find this cleaner than building an array with a for ... in loop.

ECMA 5.1+

function values(o) { return Object.keys(o).map(function(k){return o[k]}) }

It's worth noting that in most cases you don't really need an array of values, it will be faster to do this:

for(var k in o) something(o[k]);

This iterates over the keys of the Object o. In each iteration k is set to a key of o.

Answer 6

By using a simple for..in loop:

for(var key in objects) {
    var value = objects[key];
}