Access array value from function

Question

I simply want to access the value of array status from another function. However, the alert is giving me value as undefined. Here's my code:

Test.php:

<html>
    <body>
        <script>
            var status=[];
            status[0]='1';

            calculateInput();

            function calculateInput(){
                alert(status[0]);
            }
        </script>
    </body>
</html>

Maybe clarify type="text/javascript" in the script-tag? Not sure that that's the problem... — Kjeld Schmidt
– Kjeld Schmidt, Commented Mar 23, 2014 at 18:48
I even tried to remove var initilization for status as i had read somewhere to make array global you have to use status=[]; but still value comes as undefined — Dikshay Poojary
– Dikshay Poojary, Commented Mar 23, 2014 at 18:50
Interestingly, your code works just fine in a JSFiddle: jsfiddle.net/A7Z3N (Firefox, at least.) — Serlite
– Serlite, Commented Mar 23, 2014 at 18:51
In the javascript itself there is function call for calculateInput — Dikshay Poojary
– Dikshay Poojary, Commented Mar 23, 2014 at 18:51

Sampson · Accepted Answer · 2014-03-23 19:06:00Z

3

You are colliding with window.status:

function calculateInput () {
    alert( status === window.status ); // true
}

To avoid this, rename your array or get out of the global scope:

(function IIFE () {

    var status = [];

    status[0] = "1";

    calculateInput();

    function calculateInput () {
        alert( status[0] );
    }

}());

edited Mar 23, 2014 at 19:06

answered Mar 23, 2014 at 18:50

Sampson

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3 Comments

Dikshay Poojary Over a year ago

actually I also want to use the array in another function. So I have to use global.

Sampson Over a year ago

@DikshayPoojary You don't need to put it in the global scope. If you still want to, namespace it or given it a different name.

andrew.fox Over a year ago

JavaScript is great, you can overwrite undefined "constant", but window.status is protected... :)

Chris · Accepted Answer · 2014-03-23 18:53:25Z

1

Change your variable name from status to something else

ex.

<html>
    <body>
        <script>
            var mystatus=[];
            mystatus[0]='1';

            calculateInput();

            function calculateInput(){
                alert(mystatus[0]);
            }
        </script>
    </body>
</html>

answered Mar 23, 2014 at 18:53

Chris

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