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• Suggestions for entering mobile development -- pure iPhone SDK, Android SDK, Mono Touch or Titanium

  - by Tom Cabanski

  I am entering mobile development. I have been working primarily in .NET since 1.0 came out in beta. Before that, I was mostly a C++ and Delphi guy and still dabble in C++ from time to time. I do web apps quite a bit so I am reasonably proficient with Javascript, JQuery and CSS. I have also done a few Java applications. I started web programming with CGI and live mostly in the ASP.NET MVC world these days. I am trying to decide on which platform/OS and tool to select. I am concerned with the size of the market available for my applications as well as the marketibility of the skills I will pick up. The apps I have in mind would work on both phones and pads. Some aspects of what I have in mind will play better on the bigger screens that will be available on pads. Here are the options I am considering: Apple iPhone/iPad using pure Apple SDK (Objective-C) Apple iPhone/iPad using Mono Touch (C#) Android using pure Android SDK (Java) Multiple platforms using something like Titanium to generate native apps from web technologies (HTML, CSS and Javascript) Multiple platforms using HTML5 web applications that run in the browser (HTML, CSS and Javascript). Which option would you choose? Do you have a different suggestion? What are the pros and cons?

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• Load Balance WCF and Share a Remote MSMQ for High Throughput

  - by BarDev

  After a ton of reading in books and on the web, I have noticed hints of information that WCF and MSMQ can be used in achieving high throughput. The information I have seen mentions using multiple WCF services in a farm that reads from a single MSMQ queue. The problem is that I have found paragraphs here and there that mentions that high throughput can be done, but I cannot seem to find a document of how to implement it. The following is an excerpt from a MSDN article. The following paragraph is from Best Practices for Queued Communication http://msdn.microsoft.com/en-us/library/ms731093.aspx To achieve higher throughput and availability, use a farm of WCF services that read from the queue. This requires that all of these services expose the same contract on the same endpoint. The farm approach works best for applications that have high production rates of messages because it enables a number of services to all read from the same queue. This is what I'm trying to solve. I have an intranet application where a client sends a request to a WCF service. But I want the ability to load balance the WCF services on multiple servers in a farm. I also want these WCF services in the farm to do transactional reads from a remote MSMQ when an item is available in the Queue. If this is possible, an issue I have is that I do not understand the activation process of WCF to retrieve messages from a remote queue. If this is possible, does anyone know of any articles or Webcasts that would explain it in detail? BarDev

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• Windows 8 Start Screen very slow after Guest Additions

  - by Renan

  I installed Windows 8 Release Preview on a VirtualBox VM, and it worked correctly. Then I installed the Guest Additions to get the correct resolutions. Now, the Start screen is very slow, takes a long time to scroll and doesn't respond well to clicks. I believe it's not my host, as it's a good machine (i7 CPU, 6 GB of RAM) and this specifically starts to happen after installing the Guest Additions. The task manager doesn't show anything wrong (i.e. no processes pegging the CPU). Any suggestions?

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• Cannot resolve Dictionary in Unity container

  - by IanR

  Hi, I've just stumbled upon this: within a Unity container, I want to register IDictionary<TK, TV>; assume that it's IDictionary<string, int> _unityContainer = new UnityContainer() .RegisterType<IDictionary<string, int>, Dictionary<string, int>>(); but if I try var d = _unityContainer.Resolve<IDictionary<string, int>>(); it fails to resolve... I get... Microsoft.Practices.Unity.ResolutionFailedException: Microsoft.Practices.Unity.ResolutionFailedException: Resolution of the dependency failed, type = "System.Collections.Generic.IDictionary`2[System.String,System.Int32]", name = "(none)". Exception occurred while: while resolving. Exception is: InvalidOperationException - The type Dictionary`2 has multiple constructors of length 2. Unable to disambiguate. At the time of the exception, the container was: Resolving System.Collections.Generic.Dictionary2[System.String,System.Int32],(none) (mapped from System.Collections.Generic.IDictionary2[System.String,System.Int32], (none)) --- System.InvalidOperationException: The type Dictionary`2 has multiple constructors of length 2. Unable to disambiguate.. So it looks like it has found the Type to resolve (being Dictionary<string, int>) but failed to new it up... How come unity can't resolve this type? If I type IDictionary<string, int> d = new Dictionary<string, int>() that works... any ideas? thanks!

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• Is MEF an all-or-nothing affair?

  - by Dave

  I've had a few questions about MEF recently, but here's the big one -- is it really all-or-nothing, as it appears to be? My basic application structure is simply an app, several shared libraries that are intended to be singletons, and several different plugins (which may implement different interfaces). The app loads the plugins, and both the app and all plugins need to access the shared libraries. My first go at MEF was fairly successful, although I made some stupid mistakes along the way because I was trying so many different things, I just got confused at times. But in the end, last night I got my smallish test app running with MEF, some shared libraries, and one plugin. Now I'm moving onto the target app, which I already described. And it's the multiple plugins part that has be a bit worried. My existing application already supports multiple plugins with different interfaces by using Reflection. I need to be able to uniquely identify each plugin so that the user can select one and get the expected behavior exposed by that plugin. The problem is that I don't know how to do this yet... but that's the topic of a different question. Ideally, I'd be able to take my existing plugin loader and use it as-is, while relying on MEF to do the shared library resolution. The problem is, I can't seem to get MEF to load them (i.e. I get a CompositionException when calling ComposeParts()) unless I also use MEF to load the plugin. And if I do this, well... then I need to know how to keep track of them as they get loaded so the user can select one from a list of plugins. What have your experiences been with trying to mix and match these approaches?

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• Remove duplicates from a sorted ArrayList while keeping some elements from the duplicates

  - by js82

  Okay at first I thought this would be pretty straightforward. But I can't think of an efficient way to solve this. I figured a brute force way to solve this but that's not very elegant. I have an ArrayList. Contacts is a VO class that has multiple members - name, regions, id. There are duplicates in ArrayList because different regions appear multiple times. The list is sorted by ID. Here is an example: Entry 0 - Name: John Smith; Region: N; ID: 1 Entry 1 - Name: John Smith; Region: MW; ID: 1 Entry 2 - Name: John Smith; Region: S; ID: 1 Entry 3 - Name: Jane Doe; Region: NULL; ID: 2 Entry 4 - Name: Jack Black; Region: N; ID: 3 Entry 6 - Name: Jack Black; Region: MW; ID: 3 Entry 7 - Name: Joe Don; Region: NE; ID: 4 I want to transform the list to below by combining duplicate regions together for the same ID. Therefore, the final list should have only 4 distinct elements with the regions combined. So the output should look like this:- Entry 0 - Name: John Smith; Region: N,MW,S; ID: 1 Entry 1 - Name: Jane Doe; Region: NULL; ID: 2 Entry 2 - Name: Jack Black; Region: N,MW; ID: 3 Entry 3 - Name: Joe Don; Region: NE; ID: 4 What are your thoughts on the optimal way to solve this? I am not looking for actual code but ideas or tips to go about the best way to get it done. Thanks for your time!!!

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• Problem using AVAudioRecorder.

  - by tek3

  Hi all, I am facing a strange problem with AVAudioRecorder. In my application i need to record audio and play it. I am creating my player as : if(recorder) { if(recorder.recording) [recorder stop]; [recorder release]; recorder = nil; } NSString * filePath = [NSHomeDirectory() stringByAppendingPathComponent: [NSString stringWithFormat:@"Documents/%@.caf",songTitle]]; NSDictionary *recordSettings = [[NSDictionary alloc] initWithObjectsAndKeys: [NSNumber numberWithFloat: 44100.0],AVSampleRateKey, [NSNumber numberWithInt: kAudioFormatAppleIMA4],AVFormatIDKey, [NSNumber numberWithInt: 1], AVNumberOfChannelsKey, [NSNumber numberWithInt: AVAudioQualityMax],AVEncoderAudioQualityKey,nil]; recorder = [[AVAudioRecorder alloc] initWithURL: [NSURL fileURLWithPath:filePath] settings: recordSettings error: nil]; recorder.delegate = self; if ([recorder prepareToRecord] == YES){ [recorder record]; I am releasing and creating player every time i press record button. But the problem is that ,AVAudiorecorder is taking some time before starting to record , and so if i press record button multiple times continuously ,my application freezes for some time. The same code works fine without any problem when headphones are connected to device...there is no delay in recording, and the app doesn't freeze even if i press record button multiple times. Any help in this regard will be highly appreciated. Thanx in advance.

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• Get value of multiselect box using jquery or javascript

  - by Hulk

  In the code below, how to get the values of multiselect box in function val() using jquery or javascript. <script> function val() { //Get values of mutliselect drop down box } $(document).ready(function() { var flag=0; $('#emp').change(function() { var sub=$("OPTION:selected", this).val() if(flag == 1) $('#new_row').remove(); $('#topics').val(''); var html='<tr id="new_row" class="new_row"><td>Topics:</td><td> <select id="topic_l" name="topic_l" class="topic_l" multiple="multiple">'; var idarr =new Array(); var valarr =new Array(); {% for top in dict.tops %} idarr.push('{{top.is}}'); valarr.push('{{topic.ele}}'); {% endfor %} for (var i=0;i < idarr.length; i++) { if (sub == idarr[i]) { html += '<option value="'+idarr[i]+'" >'+valarr[i]+'</option>'; } } html +='</select></p></td></tr>'; $('#tops').append(html); flag=1; }); }); </script> Emp:&nbsp;&nbsp;&nbsp;&nbsp;<select id="emp" name="emp"> <option value=""></option> </select> <div name="tops" id="tops"></div> <input type="submit" value="Create Template" id="create" onclick="javascript:var ret=val();return ret;"> Thanks..

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• Postgres 9.0 locking up, 100% CPU

  - by Jake

  We are having a problem where our Postgres 9.0 server occasionally locks up and kills our webapp. Restarting Postgres fixes the problem. Here's what I've been able to observe: First, usage of one CPU jumps to 100% for a few minutes Disk operations drop to ~0 during this time Database operations drop to 0 (blocks and tuples per sec) Logs show during this time: WARNING: worker took too long to start; cancelled WARNING: worker took too long to start; cancelled No Queries in logs (only those over 200ms are logged) No unusually long-running queries logged before or during Then the second CPU jumps to 100% The number of postgres processes jumps from the usual 8-10 to ~20 Matched by a spike in Postgres Blocks per second (about twice normal) Logs show LOG: could not accept SSL connection: EOF detected Queries are running but slow Restarting postgres returns everything to normal Setup: Server: Amazon EC2 Large Ubuntu 10.04.2 LTS Postgres 9.0.3 Dedicated DB server Does anyone have any idea what's causing this? Or any suggestions about what else I should be checking out?

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• How to unlock files using handle.exe and process name?

  - by Radek

  I tried Unlocker 1.9.1 but it doesn't work correctly for me on Windows7 (worked ok on Windows XP) and also I tried LockHunter 2.0.2.103 x64 and reported a bug but .... LockHunter actually unlocks the file from GUI but not from command line. So I want to use handle.exe by SysInternals to unlock one file "TestPro.log". I know the absolut path if it helps. I can list and all processes that locked the file by executing C:\Windows\system32>c:\edutester\progs\handle testpro.log java.exe pid: 2120 type: File 338: C:\Users\Public\TestPro \TestPro Automation Framework\Logs\TestPro.log java.exe pid: 1004 type: File 934: C:\Users\Public\TestPro \TestPro Automation Framework\Logs\TestPro.log What I need to know how to unlock the file using above info from command line automatically. No user intervention is possible. Windows 7 64bit Microsoft Windows [Version 6.1.7601]

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• Windows 2003 Enterprise Server becomes unresponsive occasionally

  - by Derek Ivey

  We're experiencing issues with our Windows 2003 server, which runs SQL Server 2005 SP1. We notice that sometimes the entire server becomes unresponsive and I captured a screenshot of the task manager when this happened. I noticed that the processes are not displayed during this time and all of the memory information and handles disappear (as shown in the screenshot). Does anyone have any ideas as to what could be wrong with this sytem? I'm planning to take it down over the weekend to run Memtest86. Screenshot: http://dl.dropbox.com/u/2058/windows_screenshot.png The issue is resolved by a reboot, but I'd like to figure out the cause of this and get it fixed. I also tried to run a ping when this occurred and I got the following error in the event log: "Application popup: ping.exe - Application Error: The application failed to initialize properly (0xc0000142). Click on OK to terminate the application." Thanks, Derek

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• Compiling cpp code in netbeans produce errors, how to solve it ?

  - by Rupertt Wind

  i use the netbeans with MinGW and MYSY make /debugger but when i compile a basic cpp code in it and run it it produces two erorrs this is the code runned and the output![alt text][1] box #include <iostream> void main() { cout << "Hello World!" << endl; cout << "Welcome to C++ Programming" << endl; } output is /usr/bin/make -f nbproject/Makefile-Debug.mk SUBPROJECTS= .build-conf make[1]: Entering directory `/d/Users/Home/Documents/NetBeansProjects/newApp' /usr/bin/make -f nbproject/Makefile-Debug.mk dist/Debug/MinGW-Windows/newapp.exe make[2]: Entering directory `/d/Users/Home/Documents/NetBeansProjects/newApp' mkdir -p dist/Debug/MinGW-Windows g++.exe -o dist/Debug/MinGW-Windows/newapp build/Debug/MinGW-Windows/newmain.o build/Debug/MinGW-Windows/newfile.o build/Debug/MinGW-Windows/main.o build/Debug/MinGW-Windows/newfile.o: In function `main': D:/Users/Home/Documents/NetBeansProjects/newApp/newfile.cpp:5: multiple definition of `main' build/Debug/MinGW-Windows/newmain.o:D:/Users/Home/Documents/NetBeansProjects/newApp/newmain.c:15: first defined here build/Debug/MinGW-Windows/main.o: In function `main': D:/Users/Home/Documents/NetBeansProjects/newApp/main.cpp:13: multiple definition of `main' build/Debug/MinGW-Windows/newmain.o:D:/Users/Home/Documents/NetBeansProjects/newApp/newmain.c:15: first defined here collect2: ld returned 1 exit status make[2]: *** [dist/Debug/MinGW-Windows/newapp.exe] Error 1 make[2]: Leaving directory `/d/Users/Home/Documents/NetBeansProjects/newApp' make[1]: *** [.build-conf] Error 2 make[1]: Leaving directory `/d/Users/Home/Documents/NetBeansProjects/newApp' make: *** [.build-impl] Error 2 BUILD FAILED (exit value 2, total time: 1s) how can i solve this ?

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• Syntax for file and process exclusions in Forefront Endpoint Protection?

  - by Massimo

  I can't seem to find an official and up-to-date documentation on how to set up file and process exclusions in Forefront Endpoint Protection 2012. For file types, which of these will work? Are they the same? ext .ext *.ext What about wildcards? .e?t .e* .*t For file paths, which wildcards are allowed and how do they work? C:\path* C:\path\s*e C:\path\somef?le C:\*\somefile C:\pa*\somefile C:\pa?h\somefile *\path *:\path For processes, can wildcard be used when specifying the file name? Same syntax as file paths? Also: I read in this post that, as of October 2009, Real Time Protection ignored wildcards; is this still true for the 2012 version?

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• Which user account should be used for WSGIDaemonProcess?

  - by Nathan S

  I have some Django sites deployed using Apache2 and mod_wsgi. When configuring the WSGIDaemonProcess directive, most tutorials (including the official documentation) suggest running the WSGI process as the user in whose home directory the code resides. For example: WSGIScriptAlias / /home/joe/sites/example.com/mod_wsgi-handler.wsgi WSGIDaemonProcess example.com user=joe group=joe processes=2 threads=25 However, I wonder if it is really wise to run the wsgi daemon process as the same user (with its attendant privileges) which develops the code. Should I set up a service account whose only privilege is read-only access to the code in order to have better security? Or are my concerns overblown?

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• Array of ArrayList Java

  - by David Bobo

  Hi, I am creating an PriorityQueue with multiple queues. I am using an Array to store the multiple ArrayLists that make up my different PriorityQueues. Here is what I have for my constructor so far: ArrayList<ProcessRecord> pq; ArrayList[] arrayQ; MultiList(){ arrayQ = new ArrayList[9]; pq = new ArrayList<ProcessRecord>(); } The problem comes when I am trying to get the size of the entire array, that is the sum of the sizes of each ArrayList in the array. public int getSize(){ int size = 0; for(int i = 1; i <=9; i++){ size = size + this.arrayQ[i].size(); } return size; } is not seeming to work. Am I declaring the Array of ArrayList correctly? I keep getting an error saying that this.arrayQ[i].size() is not a method. (the .size() being the problem) Thanks for any help! David

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• How to interpret output from Linux 'top' command?

  - by Ali

  Following a discussion made HERE about how PHP-FPM consuming memory, I just found a problem in reading the memory in top command. Here is a screenshot of my top just after restarting PHP-FPM. Everything is normal: about 20 PHP-FPM processes, each consuming 5.5MB memory (0.3% of total). Here is the aged server right before restart of PHP-FPM (one day after the previous restart). Here, we still have about 25 PHP-FPM with double memory usage (10MB indicating 0.5% of total). Thus, the total memory used should be 600-700 MB. Then, why 1.6GB memory has been used?

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• Does RabbitMq do round-robin from the exchange to the queues

  - by Lancelot

  Hi, I am currently evaluating message queue systems and RabbitMq seems like a good candidate, so I'm digging a little more into it. To give a little context I'm looking to have something like one exchange load balancing the message publishing to multiple queues. I don't want to replicate the messages, so a fanout exchange is not an option. Also the reason I'm thinking of having multiple queues vs one queue handling the round-robin w/ the consumers, is that I don't want our single point of failure to be at the queue level. Sounds like I could add some logic on the publisher side to simulate that behavior by editing the routing key and having the appropriate bindings in place. But that's kind of a passive approach that wouldn't take the pace of the message consumption on each queue into account, potentially leading to fill up one queue if the consumer applications for that queue are dead. I was looking for a more pro-active way from the exchange entity side, that would decide where to send the next message based on each queue size or something of that nature. I read about Alice and the available RESTful APIs but that seems kind of a heavy duty solution to implement fast routing decisions. Anyone knows if round-robin between the exchange the queues is feasible w/ RabbitMQ then? Thanks.

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• Push Trunk or Push Branch to Production

  - by coffeeaddict

  I'd like to get an idea of some processes on build process with Tortoise SVN. Primarily I'm wondering do you push: The Mainline Trunk A branch after QA has grabbed it into a working copy locally and tested the branch and then some build pushes that branch The problem I have is I work at a craphole (hey, it is what it is and I'm venting on stackoverflow, you better believe it..good way to relieve stress due to complete utter chaos) and we have no formal process for pushing anything. In fact even worse my boss directly codes against production. When I have changes, he pushes the mainline trunk. The problem becomes when I make database changes on our Dev database for lets say Branch A. Well...that breaks Branch B and C. I have like 4 projects going on at once! Why? Well, I will not get into that (chaos). So consequently I rename a table field, or add a field or whatever in SQL Server and walla, now my other branches have stale code pointing to previous field names. So what happens? I have to merge certain changes to this branch, to that branch, etc. It feels like a war zone. Finally, what happens is I try to only merge the minimum. Lets say I made DB changes for Branch A's code but now I had to jump back on Branch B's project. Well I need to merge "some" of A's changes over for those database changes so that B's code is not going to bomb out and is able to work with the new table changes. Finally boss pushes the mainline trunk to production. Now I get an email "you forgot to remove the hyperlink for this". That hyperlink was actually a feature I added in Branch A. But what he's talking about here is he just pushed the mainline trunk to production which now has my merged changes from Branch B and any database scripts for Branch A because remember I had some DB changes and if he pushes code, it's got to reflect those changes thus some partial database changes must also be pushed even if it's not related to this project. Well...I missed the hyperlink, so kill me. Maybe that's why we need a build process boss? (sorry, it's been a nightmare working here which is why this thread is getting so detailed). Anyway, obviously this is a nightmare. And he dictates almost everything. The only reason we have source control is because I've worked on hard core teams and that's the first thing you setup. Well there was none here. Problem is I can't dictate the structure..he does but he's never really used source control!! My God. So we have no QA. This is an e-commerce website. That's another huge issue. So consequently I'm expected to be perfect. That means mainline trunk needs to be perfect for whatever we're pushing, whatever branch feature. Is this luda? wtf do I do? I could go off on him after tying so many times tactfully to explain that we need a freakin build process (not just copy local mainline trunk to production!) but I've tried to push before and got yelled at. So I gave up on that. So it will help me tremendously to know how others are pushing their source from Tortoise to production. I was not the person pushing when I was on previous teams so really I'm not too versed in build processes. We are a fairly good size e-commerce site and get a couple millions hits a month.

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• Linux halts every few seconds

  - by Zeppomedio

  We're having an issue where one our Linux boxes (Ubuntu 10.04 LTS, running on EC2 with a quadruple-large size, 68GB of RAM and 8 virtual cores with 3.25GHz each) freezes up every few seconds. Typing in an ssh session will freeze, and running strace on one of the Postgresql processes that's running usually shows: 02:37:41.567990 semop(7831581, {{3, -1, 0}}, 1 for a few seconds before it proceeds (it always gets stuck at that semop). OProfile shows that most of the time is spent in the kernel (60%) versus 37% in Postgresql. The result of these halts (which began suddenly a day ago) is that load on the box has gone from 0.7 to 10+, and causes our entire stack to slow done. Any ideas on how to track down what's going on? iostat doesn't show the disks being particularly slow or overloaded, and top shows user cpu % spike from 8% to about 40% whenever these back-ups happen.

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• Windows activation on a Virtual Machine (Physical->VM)

  - by Daisetsu

  I backed up a number of laptops to virtual machines before they are to be re-purposed, in case I need the data at some later time. While the Physical to VM processes worked fine I am encountering issues on some of the VMs. When I boot them I get an error message saying I MUST activate windows in order to login. This is expected because the hardware changed (from physical hardware to virtualized hardware). I click the OK button and expect to be prompted with ways to activate, windows sits there for quite a while then tells me that "Windows has already been activated". I click OK at that message and get take back to the beginning where I am asked to activate Windows. I have done some fairly intensive googling but haven't been able to find a real solution. EDIT: The laptops with the issues are 2 Sony Vaios, I believe that they have the OEM version of the OS originally installed by the factory.

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• Mercurial Remote Subrepos

  - by Travis G

  I'm trying to set up my Mercurial repository system to work with multiple subrepos. I've basically followed these instructions to set up the client repo with Mercurial client v1.5 and I'm using HgWebDir to host my multiple projects. I have an HgWebDir with the following structure: http://myserver/hg fooproj mylib where mylib is some collection of common template library to be consumed by fooproj. The structure of fooproj looks like this: fooproj doc/ src/ .hgignore .hgsub .hgsubstate And .hgsub looks like: src/mylib = http://myserver/hg/mylib This should work, per my interpretation of the documentation: The first 'nested' is the path in our working dir, and the second is a URL or path to pull from. So, let's say I pull down fooproj to my home folder with: ~$ hg clone http://myserver/hg/fooproj foo Which pulls down the directory structure properly and adds the folder ~/foo/src/mylib which is a local Mercurial repository. This is where the problems begin: the mylib folder is empty aside from the items in .hg. With 2 seconds of investigation, one can see the src/mylib/.hg/hgrc is: [paths] default = http://myserver/hg/fooproj/src/mylib which is completely wrong (attempting a pull of that repo will give a 404 because, well, that URL doesn't make any sense). Logically, the default value should be what I specified in .hgsub or it would get the files from the repository in some way. None of the Mercurial commands return error codes (aside from a pull from within src/mylib), so it clearly believes that it is behaving properly (and just might be), although this does not seem logical at all. What am I doing wrong?

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• simple Stata program

  - by Cyrus S

  I am trying to write a simple program to combine coefficient and standard error estimates from a set of regression fits. I run, say, 5 regressions, and store the coefficient(s) and standard error(s) of interest into vectors (Stata matrix objects, actually). Then, I need to do the following: Find the mean value of the coefficient estimates. Combine the standard error estimates according to the formula suggested for combining results from "multiple imputation". The formula is the square root of the formula for "T" on page 6 of the following document: http://bit.ly/b05WX3 I have written Stata code that does this once, but I want to write this as a function (or "program", in Stata speak) that takes as arguments the vector (or matrix, if possible, to combine multiple estimates at once) of regression coefficient estimates and the vector (or matrix) of corresponding standard error estimates, and then generates 1 and 2 above. Here is the code that I wrote: (breg is a 1x5 vector of the regression coefficient estimates, and sereg is a 1x5 vector of the associated standard error estimates) mat ones = (1,1,1,1,1) mat bregmean = (1/5)*(ones*breg’) scalar bregmean_s = bregmean[1,1] mat seregmean = (1/5)*(ones*sereg’) mat seregbtv = (1/4)*(breg - bregmean#ones)* (breg - bregmean#ones)’ mat varregmi = (1/5)*(sereg*sereg’) + (1+(1/5))* seregbtv scalar varregmi_s = varregmi[1,1] scalar seregmi = sqrt(varregmi_s) disp bregmean_s disp seregmi This gives the right answer for a single instance. Any pointers would be great! UPDATE: I completed the code for combining estimates in a kXm matrix of coefficients/parameters (k is the number of parameters, m the number of imputations). Code can be found here: http://bit.ly/cXJRw1 Thanks to Tristan and Gabi for the pointers.

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• error: cannot fork() for status: Resource temporarily unavailable (git)

  - by Elnaz Shahmehr

  when I want to do something: add , remove, pull , push in github, I just have this error in my terminal Thanks in advance! selnaz:iOS-Tidinfo Lnaz$ git add . error: cannot fork() for status: Resource temporarily unavailable fatal: Could not run git status --porcelain fatal: git status --porcelain failed fatal: git status --porcelain failed fatal: git status --porcelain failed fatal: git status --porcelain failed fatal: git status --porcelain failed fatal: git status --porcelain failed Edit: selnaz:iOS-Tidinfo Lnaz$ ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited file size (blocks, -f) unlimited max locked memory (kbytes, -l) unlimited max memory size (kbytes, -m) unlimited open files (-n) 256 pipe size (512 bytes, -p) 1 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 709 virtual memory (kbytes, -v) unlimited Edit2 selnaz:iOS-Tidinfo Lnaz$ ps xfu | wc -l ps: illegal option -- f usage: ps [-AaCcEefhjlMmrSTvwXx] [-O fmt | -o fmt] [-G gid[,gid...]] [-u] [-p pid[,pid...]] [-t tty[,tty...]] [-U user[,user...]] ps [-L] 0

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• systemd initiated uwsgi process shuts down after a while

  - by Calvin Cheng

  So I wrote this simple systemd service script:- [Unit] Description=uwsgi server script [Service] User=web Group=web WorkingDirectory=/var/www/prod/myproject/releases/current ExecStart=/bin/bash -c 'source ~/.bash_profile; workon myproject; uwsgi --ini /var/www/prod/myproject/releases/current/myproject/uwsgi_prod.ini' [Install] WantedBy=multi-user.target which works fine - it starts up and I can see my uwsgi processes in htop. However, it inexplicably shuts down after being idle for 5 minutes. If I start this process manually in bash console by executing, as web user:- source ~/.bash_profile workon myproject uwsgi --ini /var/www/prod/myproject/releases/current/myproject/uwsgi_prod.ini my process does not die after being idle. What could the problem be?

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• Software for monitoring internal software?

  - by Tyler Eaves

  Is there any good software for monitoring the health of a collection of related software? Requirements are as follows: Web-based, deployable on standard Linux/BSD software. Configurable to support a variety of processes, scheduled at various intervals. Some sort of dashboard interface, for monitoring status, viewing errors, etc. As an example, suppose we have a daily export that's scheduled to run at 6AM each morning. After the export completes, it would POST a status message, saying it had completed, passing in some sort of application key to identify the export. If that status message hadn't come in, by, say, 6:30AM, an e-mail might be sent, that application should go red on the dashboard, etc. Applications should also be able to post error/warning messages. Basically the goal is to be able to monitor all of our internal projects from one system, rather than a multitude of e-mails, log files, etc. I suspect that I'll probably have to end up writing this from scratch, but I just thought I'd ask.

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