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• How do I enable automatic reloading of view files in development mode in JRuby on Rails?

  - by thekingoftruth

  I am developing an app in JRuby on Rails. For some reason, when I edit the view files, the development JRuby Mongrel server doesn't reload them. The perplexing thing is that after editing the controller files, the server reloads them just fine on the next request. This would be annoying even when using MRI Ruby, however starting up JRuby Mongrel after every view edit is much slower, and much more annoying. (Note that once it starts up it's quite fast, the only issue is startup--the JVM has to load up every time I start JRuby Mongrel.) I'm running JRuby 1.5.0, Rails 2.3.5, and Java 6.

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• How can I check the location of perl and CPAN files?

  - by Rob

  I constantly have to set up new servers for an employer of mine for an exact purpose of his, and as such they all have to be set up in exactly the same way. So I've created a script in PHP that I run from my own box to automatically send over all the relevant files, compile everything, run updates, and everything else. However, for some reason these brand new servers come with perl, which is fine, but they have perl installed in different locations. This makes it a pain for me to copy over Config.pm for CPAN without going in and finding the location manually. Is there perhaps some command I'm unaware of that will hunt down the precise location? If it helps, usually the servers are CentOS 5

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• Enable a program in Windows to run multiple times?

  - by user135490

  I've got this legacy software that only allows you to run one copy at a time, it detects that you have another session opened and it won't allow you to open a second instance. The problem is this is a cpu intensive program and it only use a single core. Is there any hacks or tweaks so I can trick it and open more than one instance? This would allow me to retire about 5 servers... I'm using Windows 2008 R2. I had to use cff explorer to enable the use more than 2GB RAM as the program crashes when it tries to use more than 2GB.

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• Testing performance from around the world - how do I get a linux shell easily in multiple countries?

  - by Matthew O'Riordan

  We are building a socket based service where latency is paramount, and as such we have servers distributed into 7 data centres around the world. However, whilst we know we're bringing the servers closer to the clients, it's very difficult to know how effective this is, and importantly, what difference this makes compared to our competitors. As such, we want to run simple scripts that test latency and throughput for both our service and our competitors, which is easy enough using Amazon, however Amazon only have 7 data centres. We would like to know for example how we perform in locations all over the world such as South Africa, Australia, China, Peru etc. Does anyone know of any service where we could piggy back off their global infrastructure and run some scripts to test this performance? The obvious contenders are people like Monitis, but I don't think they would allow us to run custom scripts, only standard protocol monitors. Thanks for your help. Matt

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• Can gedit on mac be used to edit files over ssh?

  - by Dave

  I use a linux machine at work and a mac at home. I can ssh from my machine at home to my work machine. But the only editor that I have access to on the command line then is vi, which I don't like. Is there a way to use gedit on my mac to edit files remotely over an ssh connection? This page says that it can be done, but I think that it assumes that you are using gedit on ubuntu. On my mac (os 10.5.8) I don't have the "bookmark" option when I click "connect to server". http://thecodecentral.com/2010/04/02/use-gedit-as-remote-file-editor-via-ftp-and-ssh-ubuntu/comment-page-1#comment-50558

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• How to search for files containing a particular text string?

  - by Nam Gi VU

  How to search for files containing a particular text string using MSBuild?

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• Is it possible to guarantee a unique id for multiple items using the same id variable at a point in

  - by Scarface

  First of all, do not be overwhelmed by the long code, I just put it for reference...I have a function that preg_replaces content and puts it in a jquery dialog box with a matching open-link. For example, if there is a paragraph with two matches, they will be put inside two divs, and a jquery dialog function will be echoed twice; one for each div. While this works for one match, if there are multiple matches, it does not. I am not sure how to distribute unique ids at a point in time for each of the divs and matching dialog open-scripts. Keep in mind, I removed the preg replace function since it kind of complicates the problem. If anyone has any ideas, they will be greatly appreciated. <?php $id=uniqid(); $id2=uniqid(); echo "<div id=\"$id2\"> </div>"; ?> $.ui.dialog.defaults.bgiframe = true; $(function() { $("<?php echo"#$id2"; ?>").dialog({hide: 'clip', modal: true ,width: 600,height: 350,position: 'center', show: 'clip',stack: true,title: 'title', minHeight: 25, minWidth: 100, autoOpen: false}); $('<?php echo"#$id"; ?>').click(function() { $('<?php echo"#$id2"; ?>').dialog('open'); }) .hover( function(){ $(this).addClass("ui-state-hover"); }, function(){ $(this).removeClass("ui-state-hover"); } ).mousedown(function(){ $(this).addClass("ui-state-active"); }) .mouseup(function(){ $(this).removeClass("ui-state-active"); }); });

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• Is it possible to sync specific router settings across multiple routers?

  - by Betard Fooser

  I recently purchased a second Linksys wireless routers set up on the other side of my home and I am wondering if it is possible to somehow sync particular settings between the two? For instance what I am really after is the "MAC Filter List". I would "like" to be able to maintain the list on both routers without having to manually type in the field values. maybe this isn't possible, or has an easy answer, but hopefully those of you who know will cut me a bit of slack. I tried to "google" the answer to this of course, but it seems any searches with the words "sync" and "router" and/or "wifi" result in pages of people having issues with synching their iOS devices over wifi. I would say that have decent amount of networking knowledge in regards to average home networks, and I imagine in larger businesses / corporations they must have a "simpler" way of maintaining things like this. Any insight to point me in the right direction will be much appreciated.

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• Can I use multiple product keys with the same Win 7 DVD?

  - by RexE

  Instead of sending my friend 3 Win 7 DVDs, is it enough just to send 1 DVD and then email 3 product keys? Also, would a Win 7 Professional product key work if the DVD was for Home Premium?

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• Outgoing email getting stuck in outbox and sent out multiple times.

  - by Alain

  I have someone with 3 accounts on Outlook - one of them is giving trouble, in that when sending mail from it, it gets stuck in the outbox, saying it hasn't sent yet. When it finally does send off, he gets reports that about 10 copies have been received. The webmail associated with that account works fine, which means the hosting company (Godaddy) hasn't been helpful in solving this problem. It seems to be an Outlook issue. The other two email accounts (one of which is also a Godaddy email), work normally.

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• How to authenticate multiple entry points in a facebook app?

  - by Simon_Weaver

  I am using an IFrame application with XFBML and the new Javascript API. I'd like to have a facebook application with multiple entry points. These will most likely represent different links coming from a fan page tab. I can do this quite easily if the pages don't require authentication - for instance I can create several pages under the app and if a new user comes I can send them to any page: http://apps.facebook.com/myapp/offers http://apps.facebook.com/myapp/game http://apps.facebook.com/myapp/products The problem is that if I need to have authentication then once the user is authenticated they get redirected to my default post-authorization url. Is there a way for a user that comes to /game to stay on /game after they are authenticated without redirecting. I thought I could do it with the AJAX login form - but I cannot find out how to do that in a Facebook IFrame application. I think the example using requirelogin only works for FBML. <a href="http://apps.facebook.com/mysmiley" requirelogin=1> Welcome to my app</a>. Is there a way to accomplish this with Facebook APIs - or will I have to do some kind of clever cookie handling?

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• Same Activity called twice... Issue with Multiple AsyncTasks?

  - by stormin986

  I have three simultaneous instances of an AsyncTask for download three files. When two particular ones finish, at the end of onPostExecute() I check a flag set by each, and if both are true, I call startActivity() for the next Activity. I am currently seeing the activity called twice, or something that resembles this type of behavior. Since the screen does that 'swipe left' kind of transition to the next activity, it sometimes does it twice (and when I hit back, it goes back to the same activity). It's obvious two versions of the activity that SHOULD only get called once are being put on the Activity stack. Could this be from both onPostExecute()s executing simultaneously and both checking the flags each other set at the exact same time? This seems extremely unlikely since two processes would have to be running line-by-line in parallel... *EDIT* A lot removed from this question since I was way off in what I thought was wrong. Nonetheless I found the answer here quite useful, so I have edited the question to reflect the useful parts.

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• Why use hashing to create pathnames for large collections of files?

  - by Stephen

  Hi, I noticed a number of cases where an application or database stored collections of files/blobs using a has to determine the path and filename. I believe the intended outcome is a situation where the path never gets too deep, or the folders ever get too full - too many files (or folders) in a folder making for slower access. EDIT: Examples are often Digital libraries or repositories, though the simplest example I can think of (that can be installed in about 30s) is the Zotero document/citation database. Why do this? EDIT: thanks Mat for the answer - does this technique of using a hash to create a file path have a name? Is it a pattern? I'd like to read more, but have failed to find anything in the ACM Digital Library

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• How can I load one image over network to multiple computers on boot?

  - by user754730

  A few years ago I saw this in a company but I don't know how it was built. There was 1 Computer (I don't know if Windows Server or plain Windows 7 - the server) and 3 other computers (Windows 7 - the clients). As soon as the Windows 7 clients were started, they all started up the same image (Don't know if the same image file or just the same state) over network and were able to work on the computer. As soon as the machine was shutdown, all the changes made to the system were erased. How could I build a system like this so I have 1 image file which I keep up to date and then feed it to the other machines in my network? It would look this this basically:

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• How can I get the same SSID for multiple access points?

  - by krosenvold

  I need to upgrade my existing wireless infrastructure and this time I want 2 access points to cover my house, since I get blind spots no matter what with a single AP. I have physical cabling to my central network available for both access points. I would really like these two to interoperate seamlessly as a single SSID. How do I do this? What are the features that the new access points I'm buying would need to support?

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• Can a Mac Mini Server and XCode be used for multiple students?

  - by twerdster

  I'm not an administrator but Ive been given the task of finding out whether this is possible. The scenario is like this: At our university we are offering a course in basic iPhone programming for between 4 to 8 groups of students. We have a few iPads, iPods and iPhones but only two Mac Minis. We want to enable the students to work on XCode in the lab (and from home if possible) without buying 8 Mac Minis. Is this possible to do using a Mac Mini Server? If so how would it work if 2 or more groups want to use XCode simultaneously and to debug their programs on devices simultaneously?

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• How to sync bookmarks between Firefox, Chrome, and Safari on multiple computers?

  - by Tai Squared

  There are some similar question on bookmark syncing, but most answers point to Delicious or Google bookmarks. However, as Chrome doesn't have the Google toolbar, how would those sync? I use several computers and different browsers on them so I would like a easy solution to keep all of the bookmarks in sync on various computers and browsers in the same organizational structure throughout. Also, I would prefer to have my bookmarks only synced to my account, not necessarily visible to the whole world as on Delicious. Is there any service that could handle this?

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• Am I trying to Implement Multiple Inheritance. How can I do this.

  - by Shantanu Gupta

  I have created a class say A which has some functions defined as protected. Now Class B inherits A and class C inherits B. Class A has private default constructor and protected parameterized constructor. I want Class B to be able to access all the protected functions defined in Class A but class C can have access on some of the functions only not all the functions and class C is inheriting class B. How can I restrict access to some of the functions of Class A from Class C ? EDIT: namespace Db { public Class A { private A(){} protected A(string con){assign this value} protected DataTable getTable(){return Table;} protected Sqlparameters setParameters(){return parameter;} } } namespace Data { public Class B:A { protected B():base("constring"){} protected DataTable output(){return getTable();} protected sqlparameter values(param IDataParameter[] parameter){} } } namespace Bsns { public Class C:B { protected C():base(){} protected DataTable show() {return values(setparameter());} } } EDIT I think what I am trying to do here is Multiple inheritance. Please check. Class A { //suppose 10 functions are declared } Class B:A { //5 functions declared which are using A's function in internal body } Class C:B { //using all functions of B but require only 4 functions of A to be accessible by C. }

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• Can generated OpenVPN keys be used on multiple clients?

  - by Jakobud

  We are experimenting with running an OpenVPN server for our business. One question I can't seem to find the answer to is this: When we generate keys for one of our users for them to use at home, can their use the same keys on their home laptop as well as their home desktop? Or do we need to generate separate keys for each user's client machine?

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• Why am I getting "too many include files : depth = 1024"?

  - by BeeBand

  I'm using Visual Studio 2008 Express edition, and keep getting the following error: "Cascadedisplay.h(4) : fatal error C1014: too many include files : depth = 1024. Obviously I'm doing something very wrong with include files, but I just can't see what. Basically, I have an interface class, StackDisplay, from which I want to derive CascadeDisplay in another file: #if !defined __BASE_STACK_DISPLAY_H__ #define __BASE_STACK_DISPAY_H__ #include <boost\shared_ptr.hpp> #include "CascadeDisplay.h" namespace Sol { class StackDisplay { public: virtual ~StackDisplay(); static boost::shared_ptr<StackDisplay> make_cascade_display(boost::shared_ptr<int> csptr) { return boost::shared_ptr<StackDisplay>(new CascadeDisplay(csptr)); } }; } #endif and then in CascadeDisplay.h: #if !defined __CASCADE_DISPLAY_H__ #define __CASCADE_DISPAY_H__ #include "StackDisplay.h" #include <boost\shared_ptr.hpp> namespace Sol { class CascadeDisplay: public StackDisplay { public: CascadeDisplay(boost::shared_ptr<int> csptr){}; }; } #endif So what's up with that?

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• how can i use flash files in visual C++ without register ocx file ?

  - by hadi

  hi how can i use flash files in visual C++ without register any ocx file ? please help me thanks

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• Symlink across local volumes in webroot?

  - by geerlingguy

  I am looking for a good short-term solution to storage space concerns on my website. Currently, I have all uploaded files (flash video, images, etc.) inside the 'files' directory in my web root (/home/account/public_html/files). That directory is located on my high-speed main hard drive (a 15k SCSI drive). I have another drive with much more capacity, but spinning at 10k rpm (so still fast, but not as good for random reads/writes as the main drive. The entire drive is mounted at /backup Right now I'm just using it as a backup volume. I would like to create a symlink from my /home/account/public_html/files folder to /backup/files, and have all files reside on the second drive. However, if someone accesses a file at http://www.example.com/files/filename.jpg, would it still work if I symlinked to the second drive? (Basically, would Apache/PHP automatically know to follow the symlink for that directory?).

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• How can I attach files to a question here?

  - by Craig Johnston

  If I want to attach files on stackoverflow for readers to download, how do I do this?

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• Only one domain is not resolving via Windows DNS server at multiple locations, but is at others

  - by Brett G

  I'm having quite a weird issue. Had mail delivery issues to a specific domain. After looking closer, I realized that the DNS for that domain isn't resolving via the in-house Windows 2003 SP2 DNS server. C:\>nslookup foodmix.net Server: DC.DOMAIN.com Address: 10.1.1.1 DNS request timed out. timeout was 2 seconds. DNS request timed out. timeout was 2 seconds. *** Request to DC.DOMAIN.com timed-out (DC.DOMAIN.com and 10.1.1.1 are generic values to replace the actual ones) Even if I run this nslookup from the DC.DOMAIN.com server, I get the same result. However, all other requests are working as they should. I had a sysadmin friend try this DNS lookup on servers at several companies that he consults for (which are also Windows 2003 AD servers). The weird thing is some of these were having the same exact issue. However using public DNS servers work. I have tried clearing the DNS cache, restarting the server, restarting the services, etc. Nothing has worked. One weird event I noticed in the DNS Server Event Logs that might be related is an event ID of 5504 with the following description: The DNS server encountered an invalid domain name in a packet from 192.33.4.12. The packet will be rejected. The event data contains the DNS packet. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. In the data section below, I can see the following mentioned: ns2.webhostingstar.com Which happens to be the nameserver for the domain in question. Several discussion threads and a MS KB have pointed to disabling EDNS. I have done this via "dnscmd /config /enableednsprobes 0" and it has not fixed the issue.

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• How can I send GET data to multiple URLs at the same time using cURL?

  - by Rob

  My apologies, I've actually asked this question multiple times, but never quite understood the answers. Here is my current code: while($resultSet = mysql_fetch_array($SQL)){ $ch = curl_init($resultSet['url'] . $fullcurl); //load the urls and send GET data curl_setopt($ch, CURLOPT_TIMEOUT, 2); //Only load it for two seconds (Long enough to send the data) curl_exec($ch); //Execute the cURL curl_close($ch); //Close it off } //end while loop What I'm doing here, is taking URLs from a MySQL Database ($resultSet['url']), appending some extra variables to it, just some GET data ($fullcurl), and simply requesting the pages. This starts the script running on those pages, and that's all that this script needs to do, is start those scripts. It doesn't need to return any output. Just the load the page long enough for the script to start. However, currently it's loading each URL (currently 11) one at a time. I need to load all of them simultaneously. I understand I need to use curl_multi_*, but I haven't the slightest idea on how cURL functions work, so I don't know how to change my code to use curl_multi_* in a while loop. So my questions are: How can I change this code to load all of the URLs simultaneously? Please explain it and not just give me code. I want to know what each individual function does exactly. Will curl_multi_exec even work in a while loop, since the while loop is just sending each row one at a time? And of course, any references, guides, tutorials about cURL functions would be nice, as well. Preferably not so much from php.net, as while it does a good job of giving me the syntax, its just a little dry and not so good with the explanations.

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