Getting specific key and value from jquery object

Question

I am getting keys and values from php associative array to jquery object:

$names = array("Peter"=>"35", "Ben"=>"37", "Joe"=>"43");
$js = json_encode($names);
echo 'var names= ' . $js . ";";

Now I know how to iterate through all of the names and get their key and value:

$.each(names, function(key, value){
   alert(key + value);
});

But I need only specific value. For example how can I get only "Ben" and "37" without iterating through all the names?

But I don't know the key. I don't know that the name is Ben. I would like to get the key as well as the value — matip
– matip, Commented Jan 15, 2016 at 16:19
Try to add new Array() like: echo 'var names= new Array( ' . $js . ");"; — Yehia Elhawary
– Yehia Elhawary, Commented Jan 15, 2016 at 16:21
@matip if you don't know the key then how do you know what you're trying to retrieve? do you know the value? — billyonecan
– billyonecan, Commented Jan 15, 2016 at 16:23

Alex Andrei · Accepted Answer · 2016-01-15 16:29:10Z

4

You can do this using Object.keys

var index = 1; // the nth key you want to fetch, 1 will be second
key = Object.keys(names)[index];
value = names[key];

console.log(key + ' -> ' + value);

Will output

Ben -> 37

answered Jan 15, 2016 at 16:29

Alex Andrei

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