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• Why is distributed source control considered harder?

  - by Will Robertson

  It seems rather common (around here, at least) for people to recommend SVN to newcomers to source control because it's "easier" than one of the distributed options. As a very casual user of SVN before switching to Git for many of my projects, I found this to be not the case at all. It is conceptually easier to set up a DCVS repository with git init (or whichever), without the problem of having to set up an external repository in the case of SVN. And the base functionality between SVN, Git, Mercurial, Bazaar all use essentially identical commands to commit, view diffs, and so on. Which is all a newcomer is really going to be doing. The small difference in the way Git requires changes to be explicitly added before they're committed, as opposed to SVN's "commit everything" policy, is conceptually simple and, unless I'm mistaken, not even an issue when using Mercurial or Bazaar. So why is SVN considered easier? I would argue that this is simply not true.

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• Best way to auto-restore a database every hour

  - by aron

  I have a demo site where anyone can login and test a management interface. Every hour I would like to flush all the data in the SQL 2008 Database and restore it from the original. Red Gate Software has some awesome tools for this, however they are beyond my budget right now. Could I simply make a backup copy of the database's data file, then have a c# console app that deletes it and copies over the original. Then I can have a windows schedule task to run the .exe every hour. It's simple and free... would this work? I'm using SQL Server 2008 R2 Web edition I understand that Red Gate Software is technically better because I can set it to analyze the db and only update the records that were altered, and the approach I have above is like a "sledge hammer".

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• NHibernate very slow during debugging

  - by HeavyWave

  Have anyone stumbled upon a problem where NHibernate is extremely slow in Visual Studio while debugging, but behaves normally when run separately? Logging is disabled and the time lost seems to be when the actual queries are executed, NHProfiler shows that queries were executed very quickly (on SQL side I presume), but each session with 10 queries takes about 4 seconds. I am using SQL Express Server. As I said, even if I turn on full logging and run my application without Visual Studio it is a magnitude faster. Update. After hours and hours of work towards the issue I was able to fix it by simply switching project type from Windows Application to Console Application (although in reality it's a Windows Service, but it always worked before with Windows Application project type). What could possibly be the difference to bring NHibernate to a halt in debugging mode?

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• Re-measuring custom item renderer on a List

  - by leolobato

  I'm writing an Adobe Air client to a service similar to Twitter. On the timeline (List component) I have a custom item renderer which is basically a Canvas with a fixed-width Image and a Text control, which is multi-line. If the text is long enough to change the Canvas height, it will only be resized if I manually change the width of the Window, forcing a redraw of all renderers. If I simply scroll through the List, all "new" renderers will have the minimum height possible (which is the Image height). Any ideas on how to force the re-measurement of the renderer when I set it's data? Thanks in advance! :)

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• PHP code in Drupal 6

  - by abhishekgupta92

  A very standard example of the problem that I am facing is that of a custom content say blog type. Now there is a view namely "My Blog Posts". In that view i take the argument as User:uid. Now, for the link part i simply write the code below: global $user; and send $user-uid as the argument to User:Uid. This give me link for "My Blog Posts" or the blog posts of the logged-in user What I want is a view like "His Blog Posts". So, if i visit the profile of some other user. There should be a tab in his profile "Blog Posts by Me". So for that i need to have the UID of the user whose profile I am visiting. So, how can I get this parameter from URL of his profile or somevhere else.

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• Google Maps custom marker - can the iframe accept one like the static maps?

  - by alex

  I was reading the static maps API, and it says you can include a custom marker in the GET params. You simply link to an image file. I now have a second Google Map within an iframe, and was wondering if you can attach custom markers via the GET params to it? Here is the src attribute of the iframe currently. http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=111+Fake+Street+Noosaville+Queensland+Australia&ie=UTF8&output=embed I can't seem to find the documentation on how to do this, if possible. Is this possible?

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• c++ Using const in a copy constructor?

  - by Anton

  I have never written copy constructor, so in order to avoid pain i wanted to know if what i have coded is legit. It compiles but i am not sure that it works as a copy constructor should. Also do i have to use const in the copy constructor or i can simply drop it. (What i dont like about const is that the compiler cries if i use some non const functions). //EditNode.h class EditNode { explicit EditNode(QString elementName); EditNode(const EditNode &src); } //EditNodeContainer.h class EditNodeContainer : public EditNode { explicit EditNodeContainer(QString elementName); EditNodeContainer(const EditNodeContainer &src); } //EditNodeContainer.cpp EditNodeContainer::EditNodeContainer(QString elementName):EditNode(elementName) { } //This seems to compile but not sure if it works EditNodeContainer::EditNodeContainer(const EditNodeContainer &src):EditNode(src) { } //the idea whould be to do something like this EditNodeContainer *container1 = new EditNodeContainer("c1"); EditNodeContainer *copyContainer = new EditNodeContainer(container1);

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• Internet explore is unresponsive while loading a large page

  - by kdhamane

  We have a html page being rendered in the browser (IE) that causes the browser to hang. The page is generated through server side script (ASP.NET and viewstate is disabled). The page while loading takes a long time (its not a b\w issue since we can reproduce it on local machine) and sometimes results in script unresponsive error. On debugging the issue we found that the html size on the client side is 4.73 MB. There's also a lot of DOM traversal (using JQuery) after document is ready (jquery-document.ready). After loading as well, the page simply hangs on any user interaction (scroll, mouseover) etc. A CPU usage spike (25-50% usage) is seen during loading and on any user interaction

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• Linux friendly (.NET/Mono) browser object?

  - by HankB

  Hi folks, A friend of mine (familiar with C# and .NET on Windows) has asked how to port some functionality to a Linux host. This functionality is based on a JSP web page that fetches some data from the host server and displays it in a banner on a page. His Win/C#/.NET code simply creates a browser object which loads the page and he then inspects the resulting object to extract the data. I'm wondering what alternatives exist to duplicate this function on Ubuntu Linux. I'm not certain that the necessary libraries exist on this installation. I can assume that things like Perl and Python are ubiquitous, but I am not familiar with any libraries that include a browser object capable of executing javascript and exposing the results to another program. Any suggestions that lead in this direction are welcome. Thanks!

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• Parse a string containing percent sign into decimal

  - by Sebastian Seifert

  I have a simple string containing VAT-percantage value that needs to be stored in a decimal. The string looks like this: "19.00%". When I use the decimal.Parse() methode I always get an FormatException. Code looks like this NumberFormatInfo nfi = new NumberFormatInfo() { PercentDecimalSeparator = ".", PercentSymbol = "%" }; decimal.Parse("19.00%",NumberStyles.Any, nfi); I know, that it would be possible (in the excample above) to simply remove the %-char from the string and then parse. But isn't there a solution to use built in parsing, which can be used without testing the string for the type of number the user typed in.

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• Determine how much can I write into a filehandle; copying data from one FH to the other.

  - by Vi

  How to determine if I can write the given number of bytes to a filehandle (socket actually)? (Alternatively, how to "unread" the data I had read from other filehandle?) I want something like: n = how_much_can_I_write(w_handle); n = read(r_handle, buf, n); assert(n==write(w_handle, buf, n)); Both filehandles (r_handle and w_handle) have received ready status from epoll_wait. I want all data from r_handle to be copied to w_handle without using a "write debt" buffer. In general, how to copy the data from one filehandle to the other simply and reliably?

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• Flex: How can I use the @ContextRoot in a Button or LinkButton

  - by Dave Meurer

  I'm trying to create a button that will simply link back to the context root. I noticed flex has a @ContextRoot attribute that appears to work only in certain cases. For example, if I try to use it in the following mxml: <mx:Button label="Back to Root" click="navigateToURL(new URLRequest(@ContextRoot()), '_parent')"/> I get the following error: Error: Attributes are not callable. I can't seem to find this technique explained anywhere, is there another way? Thanks for the help! Dave

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• What, if any, is wrong with this definition of letrec in Scheme?

  - by Lajla

  R5RS gives proposed macro definitions for library forms of syntax: http://schemers.org/Documents/Standards/R5RS/HTML/r5rs-Z-H-10.html#%_sec_7.3 Which also defines letrec, in a very complicated way, certainly not how I would define it, I would simply use: (define-syntax letrec2 (syntax-rules () ((letrec2 ((name val) ...) body bodies ...) ((lambda () (define name val) ... body bodies ...))))) As far as I understand the semantics of letrec, which I use very often as a named let. It works in this way, however as I've had my fair share of debates with philosophers who think they can just disprove special relativity or established phonological theories, I know that when you think you have a simple solution to a complex problem, it's probably WRONG. There has got to be some point where this macro does not satify the semantics of letrec else they'd probably have used it. In this definition, the definitions are local to the body of the letrec, they can refer to each other for mutual recursion, I'm not quite sure what (if any) is wrong.

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• How to automatically email customers registration keys?

  - by Danny

  I've written a bit of software that I'd like to share with others (a Mac Dashboard widget, specifically), but I'd also like to be compensated a bit for the time I spent on it. I've devised my own simple registration key algorithm, which takes a customer's email address and creates a 12-character alphanumeric key. The software itself is finished, demo limitations, key validation & all. I just need to get the keys to customers. How do I simply alert a key generation script to automatically email a customer a key, upon notification that they paid my account? Can I use PayPal IPN & JavaScript? The simplest solution will do - this is a five dollar widget. :)

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• Pet project ideas in Java

  - by Amir Rachum

  I'm looking for a pet project idea in Java. I'm a Software Engineering undergraduate finishing my 3rd year. I have also been working for the past 1.5-2 years programming in C++, and I get enough of that at work. I recently learned Java and I like it very much. Already done some project assignments and some really small console applications, but I'm looking for something to invest my time in. I would like a project that is complex enough to "brag about" (have it open sourced and get people interested, added to resume) and learn while doing it, but also simple enough to be able to at least have a working version in a few months. I know the most common advice is something that I need, but I admit I simply couldn't think of anything like that. Any ideas?

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• Log4net appender filename issue

  - by JL

  I have an appender setup like this <appender name="Scheduler_Appender" type="log4net.Appender.RollingFileAppender"> <file value="c:\temp\ApplicationLog.txt"/> <rollingStyle value="Date"/> <datePattern value="yyyyMMdd"/> <appendToFile value="true"/> <staticLogFileName value="true"/> <layout type="MinLayout"> <locationInfo value="true"/> </layout> </appender> When the log file first gets created the file name is simply ApplicationLog.txt this is correct. However when the logging rolls - the filename that gets generated is ApplicationLog.txt20100323 (for example), and not ApplicationLog20100323.txt How can I change the configuration so files are rolled to [FileName][Date].[ext] rather than [FileName].[ext][Date] Thanks

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• [C#] Finding the index of a queue that holds a member of a containing object for a given value

  - by Luke Mcneice

  I have a Queue that contains a collection of objects, one of these objects is a class called GlobalMarker that has a member called GlobalIndex. What I want to be able to do is find the index of the queue where the GlobalIndex contains a given value (this will always be unique). Simply using the .contains function shown bellow returns a bool. How can I obtain the queue index of this match? RealTimeBuffer.OfType<GlobalMarker>().Select(o => o.GlobalIndex).Contains(INT_VALUE);

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• So - vuvuzelas. any programming equivalents ?? [closed]

  - by jim

  Hi All, I'm sure we've all been exposed over the past few days to the delights of the vuvuzela (see http://news.bbc.co.uk/1/hi/magazine/8738604.stm). In an attempt to mask the waspish 'parp' from our living rooms, tv sound engineers are devising all sorts of filters to try and 'calm' the abhoration :). some tho say that it simply 'adds to the ambience' and that masking it out would be a denial of its 'additive' character. Now, on a programming related front, have you had to mask any extraneous 'noise' in a piece of work that you've picked up from someone else (or perhaps even your own!!)?? If so how 'inspired' was your remedy and how did you creatively 'reverse' it out once the noise had subsided and/or the pitch changed. :) tongue firmly in cheek... jim

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• Page-specific logic in Joomla

  - by Casebash

  I am trying to enable JavaScript in a Joomla template to behave differently depending on the page. In particular, I have set the Key Reference as that appears to be the most appropriate value I could find for this purpose. Unfortunately, I can't seem to access it in my code. I tried: $this->params->get("keyref") and a few other variations, but they simply returned a blank. How can I retrieve this value or is there a better way of writing page specific logic. Related Articles Joomla load script in a specific page: This would work, but seems like overkill for what I want to do here.

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• Is there a free code coverage tool suitable for use with .NET 4 and NUnit?

  - by Damian Powell

  Is there a free code coverage tool suitable for use with .NET 4 and NUnit that runs from the command line (and is thus suitable for use on a build server)? Please note that any tools that require editions of Visual Studio higher than Professional are not appropriate in this case. I am asking this question because I can't get NCover 1.5.8 to work with NUnit 2.5.5 on a .NET 4 C# app. I can run the unit tests, and I can generate a Coverage.Xml file, but it is empty - it contains no sequence points. After a lot of research, I have concluded that this is because NCover 1.5.8 simply doesn't work with .NET 4. However, if you know better, please feel free to answer this question from another user.

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• Better way to kill a Form after the FormClosing event is overridden to hide rather than close?

  - by Paul Sasik

  I have a simple Windows Form that hosts property controls at runtime. To keep the window and its contents alive rather than killing it by handling the FormClosing event, cancel the event and simply hide the form. That's fine but at close of the application I need to actually close the window. I implemented the below but it feels kludgey. Is there a simpler, more clever way to handle this situation? (The form's controller calls KillForm explicitly after it receives a closing event from the main window.) Friend Class HostForm Private _hideInsteadOfClosing As Boolean = True Private Sub HostForm_FormClosing(ByVal sender As Object, ByVal e As FormClosingEventArgs) _ Handles Me.FormClosing If _hideInsteadOfClosing Then Me.Hide() e.Cancel = True End If End Sub Public Sub KillForm() _hideInsteadOfClosing = False Me.Close() End Sub End Class

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• Python Eggs on Google App Engine

  - by ott

  Usually I would use virtualenv and pip for deployment of web applications. With Google App Engine this doesn't work, because all import statement are relative to directory of the application. The most common approach I saw was to simply copy the packages from site-packages to the directory of the application. This involves manual work and is error-prone. Another approach was to changes install_lib and install_scripts in ~/.pydisutils.cfg, but this doesn't allow me to use pip in my home directory simultaneously. Do you have any suggestions for this?

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• Non-string role names in ASP.NET MVC?

  - by MikeWyatt

  ASP.NET MVC has good support for role-based security, but the usage of strings as role names is maddening, simply because they cannot be strongly-typed as enumerations. For example, I have an "Admin" role in my app. The "Admin" string will now exist in the Authorize attribute of my action, in my master page (for hiding a tab), in my database (for defining the roles available to each user), and any other place in my code or view files where I need to perform special logic for admin or non-admin users. Is there a better solution, short of writing my own authorization attribute and filter, that would perhaps deal with a collection of enumeration values?

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• After pip installing uWSGI there's no /etc/uwsgi/ directory - how can I use apps-enabled?

  - by orokusaki

  I've been using apt-get install uwsgi to install uWSGI. Today, I realized I needed a feature that's not available until uWSGI 1.1, and Ubuntu 12.04.1 doesn't have anything after 1.0.x, at least according to my apt-get install uwsgi=1.1 attempt. So, I used: pip install http://projects.unbit.it/downloads/uwsgi-lts.tar.gz After doing so, I get a message prescribing the use of /usr/local/bin/uwsgi to launch the program. I'm not a guru when it comes to compiling from source, but my understanding is that when you do so, nothing will be changed in the /etc/ directory. Is this correct? If not, why don't I have a /etc/uwsgi/ directory and, more specifically, a /etc/uwsgi/apps-enabled/ directory? Should I simply create the directories when installing uWSGI from source? I was hesitant to do so, considering there is no mention of this in the docs (I don't want something that accidentally works, etc.).

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• SendMessage videocapture consts

  - by Rita

  Hello, I am using a code sample to connect to a webcam, and don't really understand the meaning of the variables passed to the SendMessage method. SendMessage(DeviceHandle, WM_CAP_SET_SCALE, -1, 0) SendMessage(DeviceHandle, WM_CAP_SET_PREVIEW, -1, 0) What does the -1 mean? To scale/preview or not to scale/preview? I'd prefer that zero/one would be used, zero meaning false, and have no idea what the -1 means. SendMessage(DeviceHandle, WM_CAP_EDIT_COPY, 0, 0); What does the zero mean in this case? Or does this message is simply void and the zero has no meaning, similar to the last zero argument? Btw, what DOES the last zero argument mean? Thank you very much in advance :)

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