[thelist] Javascript object / prototype question

Matt Warden mwarden at gmail.com
Thu Jan 10 11:11:09 CST 2008


On 1/10/08, John Lauck <recaffeinated at gmail.com> wrote:
> In the example below does this cause a memory problem on line 12.  It's
> necessary to save the current object if you are using a lot of functional
> js, but does the local variable myobj get destroyed after the call to
> do_something()?  My page seems to be running terribly slow but I can't tell
> if it's related to the external libs/plugins I'm using or my code.
>
>      1    <script>
>      2    function SomeApp(key) {
>      3        this.key = key;
>      4
>      5        this.globals = {
>      6          // set a bunch of globals
>      7        };
>      8    }
>      9
>     10    SomeApp.prototype = {
>     11        do_something: function() {
>     12            var myobj = this;
>     13            // do something with myobj
>     14        }
>     15    }
>     16
>     17
>     18    var AppInst = new SomeApp("keystring");
>     19    AppInst.do_something();
>     20    </script>
>

According to your code, no. But reading between the lines, you are
probably doing this because you need an outside reference to that
object (right?). Otherwise, I am not sure why you couldn't just use
"this". In this case, it may very well cause a memory issue

-- 
Matt Warden
Cincinnati, OH, USA
http://mattwarden.com


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