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  • It seems like the safest way to think of an Inner Join is to think of it as a Cross Join and then sa

    - by Jian Lin
    It seems like the safest way to think of an Inner Join is to think of it as a Cross Join and then satisfying some condition(s)? Because the equi-join can be obvious, but the non-equi-join can be a bit confusing. But if we always use the Cross Join, and then filter out the ones satisfying the condition, then we get the resulting table. In other words, we can always analyze it by using the first record on the left table, and then go through every single records on the right, and then repeat that for 2nd record on the left, and for the 3rd, 4th, ... etc. So in our mind, we can analyze it using this way, and it is like O(n^2), although what happens in the DBMS maybe that it is a lot faster (when an index is present). Is there another good way to think of it besides this method?

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  • Which Java Web Framework allows Cross-Domain Javascripting (http proxy) ?

    - by snsd
    So just a quick intro, I am starting to explore Vaadin, and it's absolutely perfect. Previously, I was juggling PHP, Perl, Ruby, and Jquery for designing rich client web application. It didn't work out too well, as I've burnt out from trying to fix cross browser issues (aka get-it-to-work-on-IE-damn-it), handling server-side, client-side, and building a robust communication between the two tier had lot of code not related to application logic....by the time I was burnt out, only tiny bit of application logic was implemented. Vaadin seems like the answer to my problem as it only requires Java and built on top of GWT. However, I am curious how I can incorporate Cross-Domain Javascripting ? Back in LAMP environment, I had a CGI proxy script that loaded external URL, and injected JS into the proxy-loaded page. I used the CGI proxy script, as it rendered Javascript of the external URL well. Is there a class or package for Java or a specific Java web framework similiar to Vaadin that makes this possible ? Thank you.

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  • How to Apply a Business Card Template to a Contact and Customize it in Outlook 2013

    - by Lori Kaufman
    If you want to add a business card template to an existing contact in Outlook, you can do so without having to enter all of the information again. We will also show you how to customize the layout and format of the text on the card. Microsoft provides a couple of business card templates you can use. We will use their Blue Sky template as an example. To open the archive file for the template you downloaded, double-click on the .cab file. NOTE: You can also use a tool like 7-Zip to open the archive. A new Extract tab becomes available under Compressed Folder Tools and the files in the archive are listed. Select the .vcf file in the list of files. This automatically activates the Extract tab. Click Extract To and select a location or select Choose location if the desired location is not on the drop-down menu. Select a folder in which you want to save the .vcf file on the Copy Items dialog box and click Copy. NOTE: Use the Make New Folder button to create a new folder for the location, if desired. Double-click on the .vcf file that you copied out of the .cab archive file. By default, .vcf files are associated with Outlook so, when you double-click on a .vcf file, it automatically opens in a Contact window in Outlook. Change the Full Name to match the existing contact to which you want to apply this template. Delete the other contact info from the template. If you want to add any additional information not in the existing contact, enter it. Click Save & Close to save the contact with the new template. The Duplicate Contact Detected dialog box displays. To update the existing contact, select the Update information of selected Contact option. Click Update. NOTE: If you want to create a new contact from this template, select the Add new contact option. With the Contacts folder open (the People link on the Navigation Bar), click Business Card in the Current View section of the Home tab. You may notice that not all the fields from your contact display on the business card you just updated. Double-click on the contact to update the contact and the business card. On the Contact window, right-click on the image of the business card and select Edit Business Card from the popup menu. The Edit Business Card dialog box displays. You can change the design of the card, including changing he background color or image. The Fields box allows you to specify which fields display on the business card and in what order. Notice, in our example, that Company is listed below the Full Name, but no text displays on the business card below the name. That’s because we did not enter any information for Company in the Contact. We have information in Job Title. So, we select Company and click Remove to remove that field. Now, we want to add Job Title. First, select the field below which you want to add the new field. We select Full Name to add the Job Title below that. Then, we click Add and select Organization | Job Title from the popup menu to insert the Job Title. To make the Job Title white like the name, we select Job Title in the list of Fields and click the Font Color button in the Edit section. On the Color dialog box, select the color you want to use for the text in the selected field. Click OK. You can also make text bold, italic, or underlined. We chose to make the Job Title bold and the Full Name bold and italic. We also need to remove the Business Phone because this contact only has a mobile phone number. So, we add a Mobile Phone from the Phone submenu. Then, we need to remove enough blank lines so the Mobile Phone is visible on the card. We also added a website and email address and removed more blank lines so they are visible. You can also move text to the right side of the card or make it centered on the card. We also changed the color of the bottom three lines to blue. Click OK to accept your changes and close the dialog box. Your new business card design displays on the Contact window. Click Save & Close to save the changes you made to the business card for this contact and close the Contact window. The final design of the business card displays in the Business Card view on the People screen. If you have a signature that contains the business card for the contact you just updated, you will also need to update the signature by removing the business card and adding it again using the Business Card button in the Signature editor. You can also add the updated Business Card to a signature without the image or without the vCard (.vcf) file.     

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  • VB.NET Two different approaches to generic cross-threaded operations; which is better?

    - by BASnappl
    VB.NET 2010, .NET 4 Hello, I recently read about using SynchronizationContext objects to control the execution thread for some code. I have been using a generic subroutine to handle (possibly) cross-thread calls for things like updating UI controls that utilizes Invoke. I'm an amateur and have a hard time understanding the pros and cons of any particular approach. I am looking for some insight on which approach might be preferable and why. Update: This question is motivated, in part, by statements such as the following from the MSDN page on Control.InvokeRequired. An even better solution is to use the SynchronizationContext returned by SynchronizationContext rather than a control for cross-thread marshaling. Method 1: Public Sub InvokeControl(Of T As Control)(ByVal Control As T, ByVal Action As Action(Of T)) If Control.InvokeRequired Then Control.Invoke(New Action(Of T, Action(Of T))(AddressOf InvokeControl), New Object() {Control, Action}) Else Action(Control) End If End Sub Method 2: Public Sub UIAction(Of T As Control)(ByVal Control As T, ByVal Action As Action(Of Control)) SyncContext.Send(New Threading.SendOrPostCallback(Sub() Action(Control)), Nothing) End Sub Where SyncContext is a Threading.SynchronizationContext object defined in the constructor of my UI form: Public Sub New() InitializeComponent() SyncContext = WindowsFormsSynchronizationContext.Current End Sub Then, if I wanted to update a control (e.g., Label1) on the UI form, I would do: InvokeControl(Label1, Sub(x) x.Text = "hello") or UIAction(Label1, Sub(x) x.Text = "hello") So, what do y'all think? Is one way preferred or does it depend on the context? If you have the time, verbosity would be appreciated! Thanks in advance, Brian

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  • Apache 2.2, worker mpm, mod_fcgid and PHP: Can't apply process slot

    - by mopoke
    We're having an issue on an apache server where every 15 to 20 minutes it stops serving PHP requests entirely. On occasions it will return a 503 error, other times it will recover enough to serve the page but only after a delay of a minute or more. Static content is still served during that time. In the log file, there's errors reported along the lines of: [Wed Sep 28 10:45:39 2011] [warn] mod_fcgid: can't apply process slot for /xxx/ajaxfolder/ajax_features.php [Wed Sep 28 10:45:41 2011] [warn] mod_fcgid: can't apply process slot for /xxx/statics/poll/index.php [Wed Sep 28 10:45:45 2011] [warn] mod_fcgid: can't apply process slot for /xxx/index.php [Wed Sep 28 10:45:45 2011] [warn] mod_fcgid: can't apply process slot for /xxx/index.php There is RAM free and, indeed, it seems that more php processes get spawned. /server-status shows lots of threads in the "W" state as well as some FastCGI processes in "Exiting(communication error)" state. I rebuilt mod_fcgid from source as the packaged version was quite old. It's using current stable version (2.3.6) of mod_fcgid. FCGI config: FcgidBusyScanInterval 30 FcgidBusyTimeout 60 FcgidIdleScanInterval 30 FcgidIdleTimeout 45 FcgidIOTimeout 60 FcgidConnectTimeout 20 FcgidMaxProcesses 100 FcgidMaxRequestsPerProcess 500 FcgidOutputBufferSize 1048576 System info: Linux xxx.com 2.6.28-11-server #42-Ubuntu SMP Fri Apr 17 02:45:36 UTC 2009 x86_64 GNU/Linux DISTRIB_ID=Ubuntu DISTRIB_RELEASE=9.04 DISTRIB_CODENAME=jaunty DISTRIB_DESCRIPTION="Ubuntu 9.04" Apache info: Server version: Apache/2.2.11 (Ubuntu) Server built: Aug 16 2010 17:45:55 Server's Module Magic Number: 20051115:21 Server loaded: APR 1.2.12, APR-Util 1.2.12 Compiled using: APR 1.2.12, APR-Util 1.2.12 Architecture: 64-bit Server MPM: Worker threaded: yes (fixed thread count) forked: yes (variable process count) Server compiled with.... -D APACHE_MPM_DIR="server/mpm/worker" -D APR_HAS_SENDFILE -D APR_HAS_MMAP -D APR_HAVE_IPV6 (IPv4-mapped addresses enabled) -D APR_USE_SYSVSEM_SERIALIZE -D APR_USE_PTHREAD_SERIALIZE -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT -D APR_HAS_OTHER_CHILD -D AP_HAVE_RELIABLE_PIPED_LOGS -D DYNAMIC_MODULE_LIMIT=128 -D HTTPD_ROOT="" -D SUEXEC_BIN="/usr/lib/apache2/suexec" -D DEFAULT_PIDLOG="/var/run/apache2.pid" -D DEFAULT_SCOREBOARD="logs/apache_runtime_status" -D DEFAULT_ERRORLOG="logs/error_log" -D AP_TYPES_CONFIG_FILE="/etc/apache2/mime.types" -D SERVER_CONFIG_FILE="/etc/apache2/apache2.conf" Apache modules loaded: alias.load auth_basic.load authn_file.load authz_default.load authz_groupfile.load authz_host.load authz_user.load autoindex.load cgi.load deflate.load dir.load env.load expires.load fcgid.load headers.load include.load mime.load negotiation.load rewrite.load setenvif.load ssl.load status.load suexec.load PHP info: PHP 5.2.6-3ubuntu4.6 with Suhosin-Patch 0.9.6.2 (cli) (built: Sep 16 2010 19:51:25) Copyright (c) 1997-2008 The PHP Group Zend Engine v2.2.0, Copyright (c) 1998-2008 Zend Technologies

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  • VMWare ESX Updates - Which to Apply?

    - by Aaron Alton
    Wondering what more experienced ESX admins typically do... I just brought our ESX hosts up to 3.5 Update 5 (Yes, I know we're behind still). I then applied the "Critical Host Updates" baseline in VMWare update manager, and found that we're still short on 14 "critical updates". My question is, do most people go ahead and apply any update flagged as critical, or do they evaluate each update one-by-one to determine whether or not the issue that has been addressed is likely to affect them. In the SQL Server world (my alma mater, so to speak), we regularly apply service packs, and sometimes cumulative updates, but we only apply hotfixes when the issue that they are targeted towards affects us. Does the same logic hold fast in VMWare land?

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  • '0' inserted when cross-referencing numbered equations in MSWord 2007

    - by Jyotirmoy Bhattacharya
    I am inserting numbered equations using tables and multi-level lists as described in http://blogs.msdn.com/b/microsoft_office_word/archive/2006/10/20/equation-numbering.aspx I want to cross-reference the equations in my text. To do so I go to Insert-Cross reference and among the "Numbered Items" I pick the equation I wish to refer to. The problem is that if I pick the "Insert reference to" as "Paragraph number" a zero is always inserted into my text. The surprising thing is that the hyperlink in the cross-reference points to the correct equation. Also if I choose "Insert reference to" as "Page number" then the correct page numbers are inserted and they are correctly updated too.

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  • How does Google Friend Connect accomplish cross domain communication without needing to upload a file to the client domain?

    - by mboyle
    Previously, Google's Friend Connect required users to upload a couple of files to their websites to enable cross domain communication and Facebook Connect still requires you to upload a single file to enabled it. Now, Friend Connect doesn't require any file upload... I was wondering how they were able to accomplish this. Reference: http://www.techcrunch.com/2009/10/02/easy-does-it-google-friend-connect-one-ups-facebook-connects-install-wizard/

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  • How to get cross browser <sup> without intrerupting line height?

    - by jitendra
    How to get cross browser <sup> without interrupting line height? I tried vertical-align:top but it looks ok in FF 3.6 and IE but not in FF 3.0. How to get consistent in size (size of superlative text) and position of <sup> identical in all browsers without interrupting line height. I'm using <sup> to indicate footnote? not to show power Stackoverflow is killing10 experts-exchange

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  • facebook-api: what's Facebook Connect cross-domain receiver URL ?

    - by ufk
    Hiya. I'm trying to configure that my facebook application will be resizeable. The docs at http://wiki.developers.facebook.com/index.php/Resizable_IFrame talk about facebook connect cross-domain receiver URL. and in the JS code i need to enter the 'site relative url to xd_receiver.htm'. what's that? what code should be in that HTML file ? thanks

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  • Javascript permission denied. Not cross domain?

    - by Dan
    I'm working on a web app that very rarely returns a Javacript permission denied error when attempting to access document elements. I'm well aware of cross-domain issues and I am actively pursuing them as a possible cause. My question is: are there other possible causes for a permission denied exception? Just want to make sure I'm looking in to all possible avenues. Thanks!

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  • How to make cross-domain AJAX calls to Google Maps API?

    - by Pedro
    Hi everyone, I'm trying to make a jQuery $.getJSON call to the Google Maps Geocoding webservice, but this doesn't work because of cross-domain security issues. I haven't been able to figure it out online, but I've read a bit about Google Javascript API or JSONP, but so far no clear answer... Could anyone enlight me? Thanks!

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  • Is there a C++ cross platform key/value API or library for C++?

    - by Tim
    We want to persist some user settings int he GUI part of our code. I used to do Win32 programming exclusively and the typical way this was done was with registry settings. I assume that this should be done with configuration files, but was wondering if there was a library or cross platform wrapper that made key/value pair persistence very easy.

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  • Are there any simple, stupid, module based, cross-platform, c++ projects that I can check out of a r

    - by leeand00
    I'm looking for one just to get a general idea of how a standard C++ project should be properly setup. (If that's possible... :-p) Here are my requirements for this project: module-based (has libraries/modules that compile into a main program module) compiles cross-platform I'd like to do this so that I can get a hold on the basics of how a good C++ project is setup, and so that I can test out Premake.

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