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Articles indexed in September 2012

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Web Page Execution Internals

- by octopusgrabbus

My question is what is the subject area that covers web page execution/loading. I am looking to purchase a book by subject area that covers when things execute or load in a web page, whether it's straight html, html and Javascript, or a PHP page. Is that topic covered by a detailed html book, or should I expect to find information like that in a JavaScript of PHP book? I understand that PHP and Perl execute on the server and that Javascript is client side, and I know there is a lot of on-line documentation describing <html>, <head>, <body>, and so on. I'm just wondering what subject area a book would be in to cover all that, not a discussion of the best book or someone's favorite book, but the subject area.

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Best practices: Ajax and server side scripting with stored procedures

- by Luka Milani

I need to rebuild an old huge website and probably to port everyting to ASP.NET and jQuery and I would like to ask for some suggestion and tips. Actually the website uses: Ajax (client site with prototype.js) ASP (vb script server side) SQL Server 2005 IIS 7 as web server This website uses hundred of stored procedures and the requests are made by an ajax call and only 1 ASP page that contain an huge select case Shortly an example: JAVASCRIPT + PROTOTYPE: var data = { action: 'NEWS', callback: 'doNews', param1: $('text_example').value, ......: ..........}; AjaxGet(data); // perform a call using another function + prototype SERVER SIDE ASP: <% ...... select case request("Action") case "NEWS" With cmmDB .ActiveConnection = Conn .CommandText = "sp_NEWS_TO_CALL_for_example" .CommandType = adCmdStoredProc Set par0DB = .CreateParameter("Param1", adVarchar, adParamInput,6) Set par1DB = .CreateParameter(".....", adInteger, adParamInput) ' ........ ' can be more parameters .Parameters.Append par0DB .Parameters.Append par1DB par0DB.Value = request("Param1") par1DB.Value = request(".....") set rs=cmmDB.execute RecodsetToJSON rs, jsa ' create JSON response using a sub End With .... %> So as you can see I have an ASP page that has a lot of CASE and this page answers to all the ajax request in the site. My question are: Instead of having many CASES is it possible to create dynamic vb code that parses the ajax request and creates dynamically the call to the desired SP (also implementing the parameters passed by JS)? What is the best approach to handle situations like this, by using the advantages of .Net + protoype or jQuery? How the big sites handle situation like this? Do they do it by creating 1 page for request? Thanks in advance for suggestion, direction and tips.

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Ideal programming language learning sequence? [closed]

- by Gulshan

What do you think? What is the ideal programming language learning sequence which will cover most of the heavily used languages and paradigms today as well as help to grasp common programming basics, ideas and practices? You can even suggest learning sequence for paradigms rather than languages. N.B. : This is port of the question I asked in stackoverflow and was closed for being subjective and argumentative.

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Is there an easy way to (temporarily) disable the display timeout?

- by Izzy

In KDE 3.5 there was the powermanager plugin for the kicker panel, where one could easily switch between different profiles. So normally, I want the display to go to sleep after, say, 10 minutes of user inactivity. But when I watch a video, this should not happen. I know I could go via the KDE launcher, settings, powermanager, and change the setting. But this is too complicated for daily use. I also know there are those activities. But I don't want to change background etc., just the display timeout. Furthermore, when I tried this, many of the open apps simply crashed and got restarted. I simply don't like this approach. Preferably, it would be something to plug-in to the panel, which opens a menu to select the profile -- as it was with KDE 3.5. Is there a similar solution I missed?

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How to connect to other Ubuntu machine as X Server?

- by Tibo

When I want to work on my local Linux machines from windows, I use Putty+Xming and I set the Xming port in Putty connection settings. This way I have a terminal on the machine and if, for example, I run the command 'firefox' a firefox window is opened in Windows (while it is really running on the Linux machine). I want to do the same thing from other Linux machine (they are both Ubuntu machine) connect by SSH and become this connection X Server so any graphic component will be opened on local machine. How can I do that?

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Launcher tooltip display issues

- by Tudor

I've just installed Ubuntu 12.04.1, and it seems that i have some issues with the launcher: if i hover the mouse on an icon, it shows an horizontal line instead of the icon's name. if i hover it again, then it will show me the correctly displayed name, in label and all. The thing is pretty annoying. First hover no label (just that line), second hover, label. Video drivers are installed ! Any thoughts? Thank you

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help with synclient configuration on an ASUS touchpad

- by yohbs

I have recently installed Ubuntu 12.04 on my brand new ASUS K55V. The touchpad behaves weird - two finger tap is interpreted as right-click, click and drag is not working (a double click is needed) and so on. Two finger scrolling (horizontal & vertical) works great. I want the touch pad to behave the "normal" way (that is - like in my old laptop...). I read the synclient documentation and many of the questions posted here, and I can even make some stuff work. Unfortunately, I couldn't figure out how to make these work: Click and drag (that is - physically clicking the button and dragging a finger) Clicking in the right side of the button interpreted as right-click Clicking button with two fingers interpreted as middle-click. specs: The touchpad is equipped with a physical button that clicks. Here's the output of xinput list-props "ETPS/2 Elantech Touchpad" | grep Capabilities: Synaptics Capabilities (294): 1, 0, 1, 1, 1, 1, 1 Any help will be much appreciated.

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Only sdb shows up when installing 12.04 on new Dell inspiron 14z

- by Jan Korpegård

I got my brand new Dell Inspiron 14z yesterday, but failed to install Ubuntu. I can boot from a USB stick, and it works well. When trying to install, I confirm that the laptop is connected to the internet etc (as in the 2nd picture in the installation guide: How do I install Ubuntu?). When pressing "Continue" I do not get the question on installation type (alongside/replace/something else). Instead I get a window where I can select partitions: // Picture removed due to low reputation... The problem is that I can only select sdb in the drop drop down box, and I can do do nothing with sdb (like adding partitions etc). The main disk (sda) is partitioned using Gparted the following way: // Picture removed due to low reputation As far as I understand from other threads on askubuntu, this should work... What can I do to install Ubuntu alongside with Windows 7?

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SMART: DISK FAILURE IS IMMINENT (under 24 hours?)

- by flix

I have on my hard drive 2 OSes: Ubuntu 12.04 and Windows Vista( I keep it just because of school). Everything was OK on both OSes,but one day on Ubuntu I was getting awkward noises from my notebooks's hard drive and then everything stops and I couldn't do anything. On Windows everything was ok. Everytime I boot on Ubuntu I can get 5 minutes of normal run, without problems. After that the hard drive sounds crazy and nothing works. I could run S.M.A.R.T tests from a older Ubuntu CD (10.04) from the GUI(Disk Utility, or something like that and from terminal). From the GUI I got that the DISK FAILURE IS IMMINENT and I have ~700 bad blocks(or broken blocks, I had that test I while ago) on my HDD. From the terminal ( I don't remember if it was fsck or a SMART test command) I got that the HDD will fail in under 24 hours. Since then it passed 2-3 weeks. I've tried "badblocks" but after 10 hours it was still running and I had to stop it. Now I have to use cygwin and other alternatives for my linux apps on Windows. PLEASE HELP!!! How can I separate the bad blocks from Ubuntu so it wouldn't use them?

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netbeans doesn't display properly after permission change

- by psychok7

So basically i installed netbeans 7.2 through the site and everything worked fine. I then changed permissions for /var/www so that my apache2 could write on it without problems. After that netbeans started behaving strangely and giving errors and the fonts where all ugly. So i re-installed it but the problem continued. I have options in Tools that don't even show up anymore. If i open with Sudo the fonts come up nicely again, but the amount of options still isn't the same as the original installation Can anyone help me?

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Default program startup display

- by Tony Martin

I have a dual display setup and would like to be able to set which display a piece of software starts on. Most software seems to return to the last display but Stellarium always starts in the primary display. Does Linux have a way of forcing the startup display or is it something the individual program has to manage? Thanks. EDIT And with no changes on my part Stellarium is behaving nicely and remembering which screen it was on. Still nice to know if there is a way of forcing this.

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How to debug lag using Bluetooth connected mouse and A2DP headset?

- by gertvdijk

I own a Logitech M555b mouse (since a week) for use with my HP Elitebook 8570w laptop running Kubuntu 12.04. Works fine right after connecting using the KDE Bluetooth control module. However, after some time (seemingly random), it starts to lag. Movements are being delayed for roughly 500ms for a short period of time. Usually it recovers after some time too, but it can take minutes. All actions are being delayed: movements, click, scrolls. Additionally, the movements can be choppy during these times. A workaround that always works for the same short period of time is to disconnect an re-connect the mouse. This can be done using the same KDE Bluetooth control module. What did I try already? Running this at boot time: echo on > `readlink -f /sys/class/bluetooth/hci0`/../../../power/level To disable any power saving features on the Bluetooth hci0 device. Check the mouse's batteries (it's just a week old, other new batteries: same result) Checking logs and kernel messages about Bluetooth-related entries: none aside the expected messages on connect time. I'm running kernel 3.5.0-13-generic as provided in the xorg-edgers PPA. Booting the regular 3.2 Precise kernel results in the same behaviour. Some other information that may help: It happens when no other Bluetooth connections are active on the machine. Similar symptoms also occur on my Bluetooth stereo (A2DP) headset, but then it's audio lagging and skipping. Swapping Bluetooth profiles as described here then helps. Conclusion: it's not the mouse that's faulty. The headset always worked fine using my now dead Thinkpad T61p with built-in Bluetooth. The bluetooth module in my laptop is connected via USB and shows up as Bus 002 Device 003: ID 0a5c:21e1 Broadcom Corp. I'm mobile and several people around me are using Bluetooth at work (A2DP mostly). It also occurs at home, where my neighbours are probably using Bluetooth as well. It could just be radio interference, but I think Bluetooth connections should just hop to another channel. And, moreover, it just works properly instantly when re-connecting. Therefore I think it's a software driver issue and I'd like to debug it. Is there any way to get more verbose logging on the Bluetooth(-hid) modules?

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Is there an equivalent of RDP?

- by detly

The "Desktop Sharing" settings that come installed by default seem to use VNC. VNC is a bit of a bandwidth hog, can only work at the resolution of whatever screen is attached to the host, and mirrors every action on the host. (It also seems to work poorly with compositing, but maybe that's been fixed.) I know about X tunnelling, but that's annoying to use and doesn't always work properly (or, more accurately, some apps don't work properly). Is there any kind of protocol in between the two, similar to RDP used for Windows? Specifically, something that can run at a different resolution to the host screen and is a little lighter on the network? (Ideally, the more the protocol could have in common with RDP, the better.)

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Accessing second hard drive

- by Jonathan

So I recently installed Ubuntu 10.10 64-bit on my computer. I installed it on my 60gb SSD hard drive, and in the installation it never acknowledged the existence of my second hard drive. The hard drive that I keep all my files on, and which I want to make my home folder if I can, is a Western Digital Caviar Black 1TB SATA 6Gb/s 64MB cache (WD1002FAEX). I've read the following: https://help.ubuntu.com/community/Mount but honestly cannot work out how to access the hard drive from my Ubuntu installation. I did have Windows 7 64-bit prior to installing Ubuntu. I have backed up all the files on the hard drive, but if I could just access them straight off that would be super cool. Does anyone know how I can use the second hard drive? Thank you for your help EDIT: The following directories are currently in my /dev/ folder: ati/, block/, bsg/, bus/, char/, cpu/, isk/, input/, mapper/, net/, pktcdvd/, pts/, shm/, snd/, and usb/ EDIT: Result from sudo fdisk -l Disk /dev/sda: 60.0 GB, 60022480896 bytes 255 heads, 63 sectors/track, 7297 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000d2dfd Device Boot Start End Blocks Id System /dev/sda1 * 1 6994 56174592 83 Linux /dev/sda2 6994 7298 2438145 5 Extended /dev/sda5 6994 7298 2438144 82 Linux swap / Solaris @djeykib So very close to fixing it.. unfortunately on the last command you gave it says this: $ sudo apt-get install linux-lts-backport-natty Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package linux-lts-backport-natty Checking on http://www.ubuntuupdates.org/ppas reveals that it is only available for 10.04. Looks like I'll have to unplug and re-plug hardware if I want it working still :(

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Why does my flash video get stuck? (not lag?)

- by Sk606

After moving to Ubuntu 10.10 Netbook Edition, I've noticed a strange problem that manifests itself most obviously with streaming videos like youtube and hulu. The video will load and begin playing fine and eventually stop, as though it is buffering. However, it usually happens between 40 and 60 seconds into the clip. The loading indication however shows that it actually isn't buffering anymore of the data, and will just sit there. If I force the clip forward (e.g. click to start the movie somewhere ahead of the stall point) the clip will usually reload quickly and begin playing as expected. Because of the quick load times, and the consistent stop of video, I don't think the problem is related to hardware performance or network throughput. Also, I have none of these problems in 10.04. Rebooting into 10.04 makes the problem disappear. However, one more clue, I also have noticed a higher occurrence of web pages that simply "stop loading" - say, 1/10 clicks while browsing I have to hit "reload" to get the page to load because the page timed out part of the way through. This seems strangely related to the video problem, though is a lot less infuriating. Help! Where do I begin to look with a problem like this?

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What's the relation between website's traffic and Google Adsense revenue?

- by user1592845

Are there some relations between the website's daily traffic and Google's Adsense revenue? In other word, Suppose the same Ad. will be published on two different websites, the first has average daily traffic 2000 visits while the other has only 100 visits. Does one click on that ad. on the first website will make revenue more than the second website? I've got misunderstand with Google documentation and I need to make a clear idea about this subject.

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Subscription based eCommerce Site selling Physical Goods

- by Kash

I want to implement a system where customers can buy physical products as subscription with recurring billing. Customers will come to my site, visit product page and buy stuff. They need to register an account before purchasing. After registration they will be forwarded to payment processor for payment and after successful payment they will be returned back to my site. Requirement: I dont want to use Paypal as a payment processor. It will be recurring payment on monthly, quarterly, bi-annual or annual basis. Customers can login to my site in order to view their Order History, Profile Management and can edit their Billing and/or Shipping details. Customers can cancel their Subscription any time after login to their account on my site. Plan: Currently I am using wordpress with WooCommerce plugin for eCommerce functionality. I am planning to use Amazon as a payment processor. I have searched WooCommerce Extension Drectory and found WC Subscription extension that can be used for my site. But I just confirmed from the Support WC Subscription only support recurring payment with Paypal and Stripe, no other payment processor is supported at the moment. Questions: According to my need, what will be the best solution? I am open to switch the platform from Wordpress to something else that can fulfill my requirement.

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Referrer Strings

- by WernerCD

I'm not exactly sure how to ask this, but here I go. I work for a company that provides IT services. Our main costumer has a website developed by WebCompany.com, and I act as a maintainer/middle-man for this website for our customer. What's happening is that on the front page there is a drop-down-menu with links. One link goes to a third party website - ThirdParty.com. This third party website automatically logs you in based on your IP or your referrer string. Homepage ThirdParty.com Logged in via IP or referrer string. What's happening... is Website.com is passing along inconsistent referrer strings. I've asked them to look into it and they say it's not their fault, referrer strings are handled at the browser. ThirdParty.com is actually nice enough to have IP and referrer string listed on the front page for users not logged in. So... how can I trace the referrer string so that I can figure out why http://Website.com's front page link to ThirdParty.com is showing a referrer as "None" or "Thirdparty.com" instead of "ThirdParty.com"? Their website is build in PHP. Can you force all links on a website to list "referrer" as "http://website.com/"? instead of "http://website.com/portal/1" or "http://website.com/page3"?

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Issue with image lightbox and enlargement / Jquery Mobile

- by Matt

I'm working on a redesign of my weather website using Jquery Mobile. I have it set up so that you drill down through a series of content containers to get to the weather info (each group of info opens in a dialog display). Everything's worked well, but I've run into an issue with my images. I have them sized so that they fit a mobile device's screen nicely, but because of that, when you look at them in a desktop browser, you can't really make out what the image is. I've tried several image lightbox / enlargement solutions, but for some reason, none of them have worked. Either nothing happens or the images open in a new window. I thought that this might be caused by Jquery Mobile somehow overwriting the scripts and css of the lightbox / enlargements I've tried. I'm not completely sure though that this is the case, and if it is, how I can get around it to be able to enlarge the images to their original size, preferably onclick. Here is a working (for the most part - still some kinks to work out) example. If you look under the "Tropical" section at the "Satellite-Derived Products", you'll see what I mean. http://www.suncoaststormwatch.com/Beta/Index.html

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SIMPLEST way to set up password protection for a static site, with basic admin UI?

- by Joseph Turian

I have a static site. I would like the simplest approach to password protecting a directory, with a basic admin UI for adding/removing users. I will have so few users that I don't care about performance. I don't care if it's PHP or Django or whatever, I just want a complete software package. Apache basic auth isn't good, because you can't log out. Nor is there a UI for adding users. I tried throwing everything behind Django auth and serving the files through Django. However, Chrome treats all my text/css headers as text/plain, so I don't get any stylesheets showing. I can't use mod_xsendfile on my server because I can't reconfigure Apache to add new modules. I think this approach is overkill anyway. I can try configuring Nginx's X-Accel-Redirect, however that requires implementing all the Django code for auth myself, and I'd prefer an existing solution. However, this is my backup plan. Is there a code package that implements authentication with basic admin for a static site?

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Tracking a goal through a virtual pageview is not registering

- by Will

I am trying to track a goal in Google Analytics through a virtual pageview. As you can see in the code example, it is linking out from a picture instead of text with a link. I triple-checked to see if I had my Goals set up properly in the Admin panel, where the goal URL is set to "/click2", the goal type is URL destination and the match type is Head Match. I am unsure if the problem lies in the fact that it's linking out to an "https" link or if the link is attached to a picture that serves as a Call To Action. I would appreciate if any of you can help shed some light on this problem I'm having.

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touch detection of non-rectangular sprites (cocos2d)

- by hogni89

What is the correct way to implement a non-rectangular sprite in Cocos2d? I am working on a jigsaw puzzle. And therefor do our sprites have some strange forms (Jigsaw puzzle bricks). As of now, we have implemented the "detect" this way: - (void)selectSpriteForTouch:(CGPoint)touchLocation { CCSprite * newSprite = nil; // Loop array of sprites for (CCSprite *sprite in movableSprites) { // Check if sprite is hit. // TODO: Swap if with something better. if (CGRectContainsPoint(sprite.boundingBox, touchLocation)) { newSprite = sprite; break; } } if (newSprite != selSprite) { // Move along, nothing to see here // Not the problem } } - (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event { CGPoint touchLocation = [self convertTouchToNodeSpace:touch]; [self selectSpriteForTouch:touchLocation]; return TRUE; } I know that the problem is in the keyword "sprite.boundingBox". Is there a better way of implementing this, OR is it a limit when using sprites based on .png's? If so, how should I proceed? I'm new to iPhone and game development :D

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Resource management question. Resource containing resource

- by bobenko

I have resource manager handling as usual resource loading, unloading etc. With resources such an images, mesh no problem. But what to do when I have resource containing other resource (for example spriteFont contains reference to sprite and letters description). Should that sprite be added to resource manager? Or my spriteFont must be the only owner of that resource? Any thoughts on this. Have you faced with such problem? Thanks in advance.

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Assets.getBytes returns null in test environment

- by ashes999

I'm using the latest Haxe (2.10), NME (3.4.3), and MUnit. I've written some unit tests that need to fetch bitmap data from SWF symbols. The first step is to actually load the SWF data. To do this, I use NME's getByteArray along with the swf library, like so: var blah:SWF = new SWF(Assets.getBytes("assets/swf/test.swf")); The call to Assets.getBytes returns null when I'm running this under MUnit. When running my actual game code, I'm able to get the byte array (and consequentially, instantiate the SWF class). Am I doing something wrong? What am I missing? Edit: My directory structure is: . (root .\assets .\assets\*.png (other images) .\assets\swf\*.swf (SWFs) .\Source\*.hx (source code) .\Test\*.hx (tests)

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How to make an Image still when at position at Slick 2D?

- by SystemNetworks

For example, I want to put a building down. if I press 2, it will show the building near the character and it is moving with my character. I have done that. Now I wanted to know how do i put it down and stop following my character? I have something called shiftX and shiftY (Which is the position of my character) And my character looks like it is moving because the map and images itself is moving which i call, probePositionX and probePositionY.

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