javascript length of object

mark42inbound

Code: Javascript

2021-01-23 08:27:15

var size = Object.keys(myObj).length;

Jay Wong

Code: Javascript

2021-01-23 08:26:15

var person={
    "first_name":"Harry",
    "last_name":"Potter",
    "age":14
};
var personSize = Object.keys(person).length; //gets number of properties (3)

Lilamuse

Code: Javascript

2021-01-23 08:28:05

Using the Object.keys() method: The Object.keys() method is used to return the 
object property name as an array. The length property is used to get the number
of keys present in the object. It gives the length of the object.
Syntax:
objectLength = Object.keys(exampleObject).length

Paweł Chorążyk

Code: Javascript

2021-01-23 08:24:57

Object.size = function(obj) {
    var size = 0, key;
    for (key in obj) {
        if (obj.hasOwnProperty(key)) size++;
    }
    return size;
};

// Get the size of an object
var size = Object.size(myObj);

Andrew Bennett

Code: Javascript

2021-05-20 07:48:43

//length of this object is 4
let object = {
  'A':{
    '10':['a','b','c']
  }, 
  'B':{
    '20':['a','b','c']
  }, 
  'C':{
    '30':['a','b','c']
  }, 
  'D':{
    '40':['a','b','c']
  },   
}

//Get the keys of the object (A,B,C,D) and print how many there are
Object.keys().length
> prints: 4

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