Iterating values using Object.Keys

Question

I am trying to iterate through vales of properties of an object. here is my code

var player =
{

    name: 'kaka',
    age: 33,
    address: '22 green street',
    sayHello: function () {
        console.log('my name is ' + this.name + "my age is " + this.age);
    }
}

var myProperties = Object.keys(player);

for (var i = 0; i < myProperties.length; i++) {
    console.log(myProperties[i]);

}

But it only displays the properties and not values. How can i go through values like 'kaka' for name..Thanks.

Why not doing for (var key in player) { var value = player[key]; } ? — Francisco Presencia
– Francisco Presencia, Commented Oct 23, 2015 at 3:01

charlietfl · Accepted Answer · 2015-10-23 02:40:40Z

1

You would need to use the keys as lookup in original object

for (var i = 0; i < myProperties.length; i++) {
    if(typeof player[myProperties[i]] !== 'function'){
            console.log(player[myProperties[i]]); 
    }  
}

In the end I'm not sure you gain much creating and iterating the keys vs using a for in loop for this use case

edited Oct 23, 2015 at 2:40

answered Oct 23, 2015 at 2:32

charlietfl

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3 Comments

Cloudboy22 Over a year ago

Please tell me how it is done as i am a newbie. I mean player[myProperties[i]] .. why we use square brackets?

charlietfl Over a year ago

could do this same thing using for(var key in player){ console.log(player[key]} ...the [] are needed for variable property names

RobG Over a year ago

The benefit is that Object.keys only returns own enumerable properties of the object, whereas for..in returns all enumerable properties, including those on the [[Prototype]] chain.

RobG · Accepted Answer · 2015-10-23 02:49:10Z

0

Note that since Object.keys returns an Array, you can use an iterator like forEach for convenience:

Object.keys(player).forEach(function(key) {
  console.log(key + ': ' + player[key]);
});

answered Oct 23, 2015 at 2:49

RobG

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