Ask Ubuntu General Room

Seth

8:00 PM

@Lucio I'm still not sure what you are trying to do and what you expected to happen.. real code might help.

Lucio

ok

paste.ubuntu.com will help

Seth

yes..

Nathan Osman

PHP: bad. jQuery: good.

4

Lucio

paste.ubuntu.com/5859478

Jeremy

@NathanOsman nono

Lucio

8:02 PM

@Seth There you go

@Jeremy see the stars

Is something wrong in that code??

Jeremy

@Lucio That doesn't need to be in a listener... in fact, it's (the anon func) causing your issue.

Seth

@NathanOsman Someone, I won't say who, is going to tell you "shush" ;P

Sosi

hey everyone!

Nathan Osman

I know who, don't worry.

Lucio

I'm calling the processInput() function from HTML like this:

<input onkeyup="processInput(this); />"

But it is never called.

Jeremy

8:04 PM

@Lucio Yeah, but without access. You're calling that function out of it's scope. In other words, you declared the function within a local scope, but are calling it in the global scope

Lucio

@Jeremy right

Jeremy

In simpler terms, get rid of the $(document).ready or declare the processInput variable before it

Lucio

@Jeremy That is how I have it now

and that is what I don't want to do

Jeremy

@Lucio Like the former or the latter?

Lucio

what?

Jeremy

8:06 PM

@Lucio You said "that is how I have it now"

@Lucio What is how you have it now?

Lucio

yep

Without the $(document).ready ...

Jeremy

@Lucio ...so issue is it's not working even when defining the function in the global scope?

Seth

So all you have in your file is

function processInput(name) {
     alert(name.value);
}

?

Lucio

yep

that work, but when I use $(document).ready it doesn't

Jeremy

@Lucio Looks like you need to read up on how scopes and chaining work in Javascript

Lucio

8:10 PM

I want unify both files, how can I do so?

Jeremy

I explained that when using it in $(document).ready, you're defining the function inside a local scope, so it doesn't have access

If you're really insisting on defining the function inside $(document).ready, this should do it:

$(document).ready(function(){
    processInput = function(name) {
         alert(name.value);
    }
});

Lucio

@Jeremy trying this..

It didn't work.

The function is not called

checking syntax..

@Jeremy That worked.

Jeremy

@Lucio I wouldn't suggest it, though.

Lucio

What should I do now? Keep like that or remove the $(document).ready

Jeremy

It just makes code messy when you should be defining it outside of the anonymous function anyways.

Remove the document.ready and either use the var keyword or define the function.

Lucio

8:14 PM

ok

So $(document).ready(); shouldn't be used?

@NathanOsman Do you think the same?

Nathan Osman

For what?

Jeremy

@Lucio If you're not interacting with the DOM, then you're just cluttering your code

Lucio

to declares a few Javascript functions

@Jeremy I do so

Jeremy

@Lucio Where do you interact with the DOM?

Lucio

@Jeremy e.g.: $('input:checkbox').prop('checked',false);

Jeremy

8:16 PM

@Lucio I suggest defining functions outside of $(document).ready unless you want them to only be in the local scope.

Lucio

ok

So I would load the JavaScript functions at the end of the HTML file.

Jeremy

I guess if you wanted to optimize your Javascript, then you may, but you're using inline listeners anyways... so it doesn't matter.

Lucio

@NathanOsman I think that you like that

Jeremy

@Lucio Some people advocate for before </body>

Nathan Osman

You should always avoid polluting the global namespace if possible.

This is typically done by declaring functions within an anonymous function.

Jeremy

8:17 PM

@NathanOsman He's using inline Javascript to call a function, so he really doesn't have a choice.

Nathan Osman

@Jeremy Ah, okay.

Lucio

discussion finished :)

Nathan Osman

But is it really necessary to use inline JavaScript?

Personally, I would avoid that if at all possible.

Jeremy

Though I'd still advise against it. It's always good to separate functions. Design is meant for HTML/CSS, so why mix Javascript in with it?

@NathanOsman samesies

Lucio

let my explain it..

Jeremy

8:20 PM

I gotta go. Bye!

Good luck with your scripting.

Nathan Osman

It's better to bind event handlers from JavaScript instead of doing it inline - then you can bind anonymous functions to the events.

Lucio

I cannot declare EventHandlers for objects that doesn't exist when the JavaScript code is read.

Jeremy

@Lucio That's why you use $(document).ready, though.

Nathan Osman

When precisely is the object created?

Lucio

inputs

etc

Nathan Osman

8:21 PM

Yes, but when are they created? After the DOM is loaded? After a button is clicked?

Lucio

Because I create this elements using PHP scripts at run time with the .post() jQuery function

Nathan Osman

So in response to an AJAX request?

Lucio

right

Nathan Osman

Are you using createElement() to create them?

Lucio

no

Nathan Osman

8:22 PM

What are you using then?

Jeremy

@Lucio Oh boy. Use the success method, then.

Lucio

just printing the HTML code

Jeremy

@NathanOsman Probably just copying the text from PHP... nothing json-ish

Lucio

yes

Nathan Osman

Ah... I see now.

As @Jeremy mentioned, returning JSON would be a better option.

Then use the JSON data to construct the elements.

Lucio

8:23 PM

I could write the Event Handler in the print, though. But I don't like that

Jeremy

api.jquery.com/jQuery.post <-- Look at "success"

Lucio

@Jeremy I know..

Jeremy

Alright, I'm out (for realz). Bye

Nathan Osman

Can you give a short example of the data returned by the PHP script?

Lucio

bye and thanks for your opinion..

yep

Jeremy

8:24 PM

Feel free to ping me if you have questions (@Lucio)

Lucio

ok, thanks :)

@NathanOsman I'll show you, but I warn you, I'm not using CMS by now..

paste.ubuntu.com/5859546

So that table is printed into a DIV

coding_corgi

Well well well....

Lucio

that table will have dynamic data

@coding_corgi Thank you guys :)

coding_corgi

@Lucio blah blah blah [stupid-smiley-face] :P

Lucio

haha

How is GNUplot?

coding_corgi

8:29 PM

@Lucio boring.... Ha ha... Just needed to make a graph, don't label me :D

Nathan Osman

@Lucio: Here's what the JSON for that data might look like: paste.ubuntu.com/5859558

Then you create the table from that data.

Lucio

@NathanOsman from JavaScrip?

why would I use that?

coding_corgi

@Lucio because we told you so

:D

Lucio

lol

coding_corgi

@Lucio ▼EVERYBODY DOWNVOTE NOW!

haha

ah....

well

me is bored

and me does not want to do math hw

so

i ended up here :P

Lucio

8:34 PM

@coding_corgi Yeah, you use GNUplot, how can not be bored..

coding_corgi

@Lucio I just wanted to make a graph! Don't label me!

Lucio

hahahha

I'm just kidding, I'm bored too.

coding_corgi

@Lucio GRRRRRRRRRRRRRrr.... not funny :O

@Lucio yeah...

made this new program

here's how you run it:

sudo selfdestruct now -h

Lucio

@coding_corgi Your dog is still alive? Or that is you?

coding_corgi

very useful...

@Lucio i don't have a corgi sadly...

Lucio

8:36 PM

I can imagine that

coding_corgi

@Lucio yes....

Lucio

I'm out.

good bye

coding_corgi

@Lucio sudo shutdown now -h

also add this to /etc/rc.local:

sudo shutdown now -h

@NathanOsman Hiya!

Ubuntu Questions on U&L

1

Q: Can I recover from a system disk error on Ubuntu Linux?

I got a strange looking warning message in Windows Vista about a potential hard disk failure. I say strange because I have never in my life seen that type of warning in Windows. It suggested that I backup everything on this disk as soon as possible. The hard disk in question is the one I use for...

Lucio

@NathanOsman I think that you were trying to tell me this procedure, isn't?

guntbert

8:59 PM

5

Q: Why can I not set custom resolution for Ubuntu 12.04 running in a virtual machine?

I have installed Ubuntu 12.04 on the latest VirtualBox release and I cannot change the resolution. Here are the commands that i run: -- in Windows VBoxManage setextradata "Ubuntu" "CustomVideoMode1" "1920x1080x32" -- in Ubuntu ~$ gtf 1920 1080 32 # 1920x1080 @ 32.00 Hz (GTF) hsync: 35.2...

12.04 virtualbox resolution

VTR

Takkat

@guntbert but there is no upvotable answer :/

guntbert

@Takkat, askubuntu.com/a/281352/117103

Takkat

naa - this answer is weird. Guest additions should always match the version of virtual box.

It's true however that you can not run 12.04 in old release of virtual box... but this is not really an answer to that question.

Ubuntu Questions on U&L

9:20 PM

0

Q: Booting and installing from USB

I've been trying to install ubuntu (server edition, 13.04 i386) through a USB pen drive, and so far I've miserably failed. This is on a lenovo x230, with USB-* options all up there in the boot order, as well as UEFI / secureboot support disabled (as it seems it messes with most linux distro). So ...

ubuntu usb system-installation

JohnMerlino

what is more popular byobu or screen?

Seth

9:36 PM

byobu

Screen has been deprecated iirc

@JohnMerlino If you run screen is says "exit screen and run byobu"

JohnMerlino

@Seth not on 12.04

Seth

oh? Since 12.10 then

JohnMerlino

@Seth So you are saying in the future byobu will be used and screen will not be used for even simple tasks such as multiplexing several virtual consoles and to ignore the HUP (hangup) signal?

Seth

@JohnMerlino yes, exactly

Wait a second.

@JohnMerlino I take that back. It does work, just not how I thought it would.

I guess I've never used screen before ^^

I still think byobu is preferred.

JohnMerlino

I see a lot of tutorials on GNU screen but not much on byobu, that's why I ask

Seth

9:46 PM

screen is older

JohnMerlino

in fact go on youtube and type byobu and all that comes up is a screen tutorial

Seth

Hmm.

JohnMerlino

9:58 PM

yeah it's a little confusing.

Im just tired of learning a lot of programs that do the same thing

Seth

yeah really.

Ask Ubuntu Meta

10:20 PM

0

Q: how do i change a password on askubuntu

I usually just get auto-logged-in when i click a link leading to AskUbuntu. I just tried to follow this link: http://ubuntuforums.org/showthread.php?t=1117283 Instead, i was presented with a login. It's been a long time and i can't remember it. I don't see any of the usual "forgot my password" ...

discussion

Alvar

10:43 PM

askubuntu.com/q/316025/10698 damn, well done!

JohnMerlino

10:55 PM

I'm wondering if this is even possible to do. I am not looking for the path of the ruby program, but rather the path at which a ruby instance was executed: askubuntu.com/questions/318293/…

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