Skip to main content

Inspecting object in javascript

An interesting problem is to inspect unknown objects in javascript. Found a good example of how to do it here. Just to rehash in case the site move:

function inspect(obj, maxLevels, level)
{
var str = '', type, msg;

// Start Input Validations
// Don't touch, we start iterating at level zero
if(level == null) level = 0;

// At least you want to show the first level
if(maxLevels == null) maxLevels = 1;
if(maxLevels < 1)
return '<font color="red">Error: Levels number must be > 0</font>';

// We start with a non null object
if(obj == null)
return '<font color="red">Error: Object <b>NULL</b></font>';
// End Input Validations

// Each Iteration must be indented
str += '<ul>';

// Start iterations for all objects in obj
for(property in obj)
{
try
{
// Show "property" and "type property"
type = typeof(obj[property]);
str += '<li>(' + type + ') ' + property +
( (obj[property]==null)?(': <b>null</b>'):('')) + '</li>';

// We keep iterating if this property is an Object, non null
// and we are inside the required number of levels
if((type == 'object') && (obj[property] != null) && (level+1 < maxLevels))
str += inspect(obj[property], maxLevels, level+1);
}
catch(err)
{
// Is there some properties in obj we can't access? Print it red.
if(typeof(err) == 'string') msg = err;
else if(err.message) msg = err.message;
else if(err.description) msg = err.description;
else msg = 'Unknown';

str += '<li><font color="red">(Error) ' + property + ': ' + msg +'</font></li>';
}
}

// Close indent
str += '</ul>';

return str;
}

Comments

Anonymous said…
Thanks for the posting. This example worked when all of the other ones I tried failed.

Popular posts from this blog

Dell Inspiron Mini 9

Yesterday went to Low Yat to buy my cousin a sub RM 1500 notebook. Of course with that kind of price tag it would have to be a netbook jelah. Anyhow, I was short on time so I didn't get to browse thoroughly. Just went for one quick round around level 2 and picked the one that I thought would fulfil his need. The thing is, as soon as I stepped out of the lift there was a shop that sold the new Dell Inspiron Mini 9 for only RM 1199. I was suprised. Just 1199. I couldn't believe my eyes. With original Windows XP and all. RM 1199. I thought there must be something wrong. Better survey first. So went around level 2. There was nothing that could match that price. Most of the other netbook from acer, asus and lenovo even was around RM 1600. So I decided I'll just go with the Dell lah. But to tell you the truth if I had money to buy for my own use, I'd go with the Lenovo Ideapad S10. Fuh.. she's one sweet mama... Smooth rounded curves, slim white profile. Pergh.. But anyway

Me and my sleep apnea

I have been suffering from sleep apnea for quite a few years already. It started to show when I was still with OSCC some 6 years back when I would sometimes "accidentally" sleep at my cubicle. Early on I just dismissed it as because I was growing fat (we ate a lot at OSCC.. :P and I barely went anywhere except my cubicle) and also because of babies. Oh babies.. those cute little things that keeps you awake at night so that they can be so cute and charming when your friends and relatives come over the next day. So it was dismissed. Later on I got more and more used to sleeping at work, started associating it with my lack of motivation and sometimes feeling of downright depression. And I kept growing fatter and fatter, which I assumed was the reason why I was getting more and more tired. But then around 2 years ago a friend of mine suggested maybe I've got sleep apnea. And a few other people suggested I go to a sleep clinic and all that. Put it off for quite a while. Unti

Installing Centos 7 on HP G7 Server

When I first initially tried it, the installer cannot detect any local hard disk to install to. After much googling found out that it was because a certain driver for the Smart Array Controller is no longer available on Centos 7. To allow for use of the new driver on old hardware, you need to enable the option. Once the DVD has booted and on the first menu screen, highlight the first option and then press tab which would bring you to a command line where you can add additional parameters to boot. Add the following parameters: hpsa.hpsa_allow_any=1 hpsa.hpsa_simple_mode=1 And then press enter to boot. You should now be able to install as you wish. After installation, on the first boot, make sure at the menu, press 'e' to edit the parameters and add them again. Then once booted, go to /boot/grub2/grub.cfg to permanently add the parameters to the menu. Refer to http://serverfault.com/questions/611182/centos-7-x64-and-hp-proliant-dl360-g5-scsi-controller-compatibility and it&#