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• Difference between BOOST_CHECK_CLOSE and BOOST_CHECK_CLOSE_FRACTION?

  - by Rhys Ulerich

  Can anyone describe the difference in behavior between BOOST_CHECK_CLOSE and BOOST_CHECK_CLOSE_FRACTION? The documentation implies the that both macros treat their third parameter identically, which makes me suspect the documentation is wrong. In particular, BOOST_CHECK_CLOSE_FRACTION gives me some odd looking results: error in "...": difference between *expected{0} and *actual{-1.7763568394002506e-16} exceeds 9.9999999999999995e-07 Is there a gotcha because I expect a zero result? I've not been successful at reading through the underlying macro declarations. Please note BOOST_CHECK_SMALL isn't appropriate for my use case (comparing two vectors after a linear algebra operation).

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• What does NSXMLParserUndeclaredEntityError mean?

  - by Ben Guest

  When using NSXMLParser, what does NSXMLParserUndeclaredEntityError mean? Apples documentation is completely un-helpfull

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• Working with WebKit on Windows

  - by Aram Havarneanu

  Hello, I want to use the WebKit engine in my Win32 application. I can't find any documentation on the official site, or anywhere else. I know it uses COM, but I can't find any documentation about how to use the thing. I know there are multiple WebKit ports for windows. There is the Apple port, to use it you need Safari, there is the Google Chromium port, there is a Cairo port and there is a Qt port. I'll stick to the Apple port for now. Any hints, links? Thanks

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• Out-Of-Memory while doing Core Data migration

  - by Kamchatka

  Hello, I'm migrating a CoreData model between two versions of an application. I was storing binary data as blobs in the previous version and I want to take them out of the blobs for performance. My issue is that during the migration it seems that Core Data loads everything into memory which leads to Low Memory Warnings and then to my app being killed. Apple documentation suggests the following : http://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/CoreDataVersioning/Articles/vmCustomizingTheProcess.html#//apple_ref/doc/uid/TP40005510-SW9 However, it seems to rely on the fact that the large objects are applied different mapping. In my case, all the objects are basically the same and the same mapping has to be applied to each of them. I don't see in this case how I could apply their technique. How should I handle a migration with very large objects ?

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• Python os module path functions

  - by broiyan

  From the documentation: os.path.realpath(path) Return the canonical path of the specified filename, eliminating any symbolic links encountered in the path (if they are supported by the operating system). When I invoke this with an extant file's name, I get the path to it: /home/myhome/myproject. When I invoke this with a 'nonsense.xxx' string argument, I still get a path to /home/myhome/myproject/nonsense.xxx. This is a little inconsistent because it looks like nonsense.xxx is taken to be a directory not a file (though it is neither: it does not exist). When I invoke this with a null string file name, I still get a path to /home/myhome/myproject. How can I account for this behaviour when the documentation says so little about realpath()? (I am using Python 2.5.) Edit: Somebody suggested a way to test if files exist. My concern is not to test if files exist. My concern is to account for behaviour.

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• Creating a Custom UserControl TestContainer for Visual Studio

  - by AMissico

  I like to use the "UserControl TestContainer" that works great for testing a controls properties during design time. Yet it has limitations. Usually, I just create a Windows Form Application to test the control's run-time interface. It would be nice to combine the two phases. Today, I discovered that the test-container is defined in the project file as show below. What I like to do is create my own test-container and use it for my Windows Forms Control Library projects in Visual Studio 2008. I cannot find any specific documentation, and the documentation I found was related to MSTest and not helpful. Any help, suggestions, or research directions for implementing my own test-container? <ItemGroup> <Service Include="{94E38DFF-614B-4cbd-B67C-F211BB35CE8B}" /> </ItemGroup>

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• JQuery-tmpl Template Switching Not working.

  - by Mike

  I'm trying to implement "more/less" functionality using the official jquery-tmpl plugin. I've looked at the examples, but I cannot seem to get the functionality to work in my own implementation. When I click on one of my "More" buttons, I seem to get an error thrown of: Uncaught TypeError: Property 'tmpl' of object #<an Object> is not a function This is my implementation here From what I can tell, the example I'm trying to replace is doing the following: Render the "Master" template On-click: Find the corresponding template object (tmplItem) to the clicked element. Pass in reference to a new template. Call the update function to re-render. Have I understood the documentation wrong? From what I can tell I'm doing the same thing as the example on the official documentation.

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• UITableViewCells loaded from NIB always nil

  - by Jason B

  I'm trying to create a simple form using a UITableViewController as documented in the Apple Developer Documentation here: http://developer.apple.com/iphone/library/documentation/UserExperience/Conceptual/TableView_iPhone/TableViewCells/TableViewCells.html What I'm trying to do is located in the section entitled: "The Technique for Static Row Content" I've created a couple of UITableViewCells and added them to my nib, but when I try and access them to add them to the UITableView (in the cellForRowAtIndexPath method) they are always null. It's like they are not being properly loaded from the nib. I've double/triple/quadruple checked my code to make sure I'm doing it exactly as detailed in the docs, but no luck. Is there something obvious I'm missing here? Thanks

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• Problem with ranking of search results in SharePoint 2007 if using the CONTAINS predicate

  - by mythicdawn

  While writing a front-end for the SharePoint Search web service for work, I did some quick testing with the MOSS Search Tool to make sure things were working right under the hood. What I found was that queries composed only of CONTAINS predicates (FREETEXT ones were fine) would have a rank of 1000 for any results that were returned. According to the documentation (http://msdn.microsoft.com/en-us/library/ms544086.aspx): "If the query returns a document because a non–full-text predicate evaluates to TRUE for that document, the rank value is calculated as 1000." Given that the behaviour I am seeing seems to contradict the documentation, is it the case that all queries that use only the CONTAINS predicate will produce ranking like this?

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• How to upload a picture for an event using the Facebook Graph API?

  - by Thorarin

  I would like to know how to add a picture to an event using the Facebook Graph API. I have seen this question and tried some variations on that theme, without any success. The official documentation doesn't seem to make any mention of it. I'm using PHP for this particular project and I've looked at the PHP SDK source code, which is not helpful in any way. Requesting metadata for pictures using https://graph.facebook.com/eventid/picture?metadata=1&access_token... doesn't seem to be recognized, so no help there either. Has anyone come across some example or documentation on how to do this? (don't care about which language it is in)

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• What simple methods are there to wrap a c++ based object model with a COM interface

  - by Rich

  I have a pre-existing c++ object model which represents the business layer tier of an application. I want to be able to expose the object model to applications written in other languages i.e vbscript, VB, javascript etc. I believe the best way of doing this is to wrap the business objects with a COM layer. What fast and effective methods are there for doing this. Any advice, links to practical "How to" documentation would be very much appreciated. Because I'm starting a bounty on this , here's a few extra guidelines for potential bounty hunters :- 1)I've decided on an ATL approach 2)I'm now specifically looking for links to really good "how to and quickly" documentation on wrapping a pre-existing c++ object model to make it useable by a scripting language like javascript 3) Something with small working examples showing me what code needs to be added to what files, e.g what goes into the cpp , idl and hpp/h etc. It' must include an example I can compile test and change to get a better understanding.

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• How do I show/hide an element in YUI as in jQuery?

  - by Chad Johnson

  In jQuery, when I want to show or hide something, I do this: $('#elementId').show(); $('#elementId').hide(); How do I do this with YUI? I've tried YAHOO.util.Dom.get('elementId').hide(), asked my co-workers, looked at the documentation, and searched Google, and I've found nothing helpful. From the documentation, it looks like this should work YAHOO.util.Dom.get('elementId').setStyle('display', 'none') but of course it does not. All I can think of is this, which sucks because then I'm not using a framework: document.getElementById('elementId').style.display = 'none';

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• No Carbon Human-Interface-Toolbox in OSX 64-bit binaries?

  - by yairchu

  I get the impression that Carbon Human Interface Toolbox does not work in 64-bit binaries. Apple's documentation says: The Carbon Help Manager is not available to 64-bit applications. ... The Control Manager is not available to 64-bit applications. ... The Data Browser is not available to 64-bit applications. ... I just want to verify that: There is no work-around around this. If this is simply the case. Why don't Apple's documentation simply state it as such?

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• Accessing HttpRequest from Global.asax via a page

  - by Polymorphix

  I'm trying to get a property (ImpersonatePersonId) from a page in global.asax but get a HttpException saying 'Request is not available in this context'. I've been searching for some documentation on where in the pipeline the request is accessible, but as far as I can see all Microsoft can produce of documentation is one-liners like "PostRequestHandlerExecute: Occurs when the ASP.NET event handler finishes execution." which really doesn't give me much... I've tried placing the call in both Pre and PostRequestHandlerExceute but with the same result. I wonder if anyone with experience in this would be so kind as to tell me where the Request object is available. My code from global asax is below. ICanImpersonate page = HttpContext.Current.Handler as ICanImpersonate; ImpersonatedUser impersonatePerson = page != null ? page.ImpersonatePersonId : null; Response.Filter = new TagRewriter(Response, new TagProcessor(Context, impersonatePerson).Process); What I want to do is rewrite some HTML based on some request parameters.

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• Stream/string/bytearray transformations in Python 3

  - by Craig McQueen

  Python 3 cleans up Python's handling of Unicode strings. I assume as part of this effort, the codecs in Python 3 have become more restrictive, according to the Python 3 documentation compared to the Python 2 documentation. For example, codecs that conceptually convert a bytestream to a different form of bytestream have been removed: base64_codec bz2_codec hex_codec And codecs that conceptually convert Unicode to a different form of Unicode have also been removed (in Python 2 it actually went between Unicode and bytestream, but conceptually it's really Unicode to Unicode I reckon): rot_13 My main question is, what is the "right way" in Python 3 to do what these removed codecs used to do? They're not codecs in the strict sense, but "transformations". But the interface and implementation would be very similar to codecs. I don't care about rot_13, but I'm interested to know what would be the "best way" to implement a transformation of line ending styles (Unix line endings vs Windows line endings) which should really be a Unicode-to-Unicode transformation done before encoding to byte stream, especially when UTF-16 is being used, as discussed this other SO question.

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• How to merge/crosslink Javadoc?

  - by Tom Wheeler

  If you have the standard Javadoc for a few different projects, how can you process them to create a single unified set of documentation in which everything is cross-linked? Ideally, the result would be similar to the documentation for the various modules in the NetBeans Platform: http://bits.netbeans.org/dev/javadoc/index.html but I've looked at their build scripts and they're predicated on you building everything from source. I'm looking for something which could also handle linking in Javadoc for third-party libraries, so I'd imagine it would need to be a post-processing operation. I can't be the first person to ever want this. Any ideas?

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• Are there any Python reference counting/garbage collection gotchas when dealing with C code?

  - by Jason Baker

  Just for the sheer heck of it, I've decided to create a Scheme binding to libpython so you can embed Python in Scheme programs. I'm already able to call into Python's C API, but I haven't really thought about memory management. The way mzscheme's FFI works is that I can call a function, and if that function returns a pointer to a PyObject, then I can have it automatically increment the reference count. Then, I can register a finalizer that will decrement the reference count when the Scheme object gets garbage collected. I've looked at the documentation for reference counting, and don't see any problems with this at first glance (although it may be sub-optimal in some cases). Are there any gotchas I'm missing? Also, I'm having trouble making heads or tails of the cyclic garbage collector documentation. What things will I need to bear in mind here? In particular, how do I make Python aware that I have a reference to something so it doesn't collect it while I'm still using it?

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• Seeking past end of file causes Apache hang, and it never restarts.

  - by talkingnews

  I've actually solved my problem with a better script, but I'm still left wondering why Apache2 hung completely - this is an out-of-the-box ISPCONFIG 3.03 install, everything bang up to date, running perfectly. Until... The troublesome but innocent-looking script: $fp = fopen("/var/log/ispconfig/cron.log", "r"); fseek($fp, -5000, SEEK_END); $line_buffer = array(); while (!feof($fp)) { $line = fgets($fp, 1024); $line_buffer[] = $line; $line_buffer = array_slice($line_buffer, -10, 10); } foreach ($line_buffer as $line) { echo $line; } You get the idea, just a script I found on a forum somwehere. I did this for various logs, since it's a nice easy window on what's occurring (in a protect dir, of course!). One day, the logs having grown large an me having sorted all my cron, scripting and mail queue errors, I thought I was time to start afresh. updated, rebooted, archived and deleted the logs. When I ran my script a couple of hours later, it hung. And hung. 8 minutes I waited. Chrome timed the page out, of course, but the server never came back to life. htop showed /usr/sbin/apache2 -k restart using 100% CPU. Never came back until I did a service apache2 restart. Ran fine, as soon as I hit that logfile again...dead. So, I worked out it was the logfile script, and I worked out that seeking beyond the end of the file wasn't good, and I found a better script http://www.php.net/manual/en/function.fseek.php#90450 But what I'm left wondering is... why didn't something restart or kill the process? How was one hanging page able to bring down the whole server? It's running suphp. I say "out of the box", I've tweaked mysql and apache to fork and reserve sensible amounts of processes for the 512Mb RAM the VPS has, and it'll handle multiple refreshes of large pages, and hadn't hung before. Any ideas how I'd avoid this? Google isn't my friend in this instance beyond the reccs. above about number of processes vs RAM available.

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• Tabcompletion and docview while editing rc.lua

  - by Berxue

  I saw that there is a lua plugin for eclipse and there is a docpage on the awesome main page api_doc and all the .lua files in /usr/share/awesome/lib. So I thought it must be possible to create a Library or Execution Environment so that one has tabcompletion and docview. So I tried making my own Execution Environment: wrote the standard .rockspec file downloaded the documentation made an ofline version of it and put it in docs/ folder ziped the files and folders in /usr/share/awesome/lib ziped all up tried it out ... and it failed. When I try to view a documentaion for a .lua file I get "Note: This element has no attached documentation." Questions: Am I totaly wrong in my doing (because I have the feeling I am)? Is there any way to edit the rc.lua with tabcompletion and docview?

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• Is it any desktop wysiwyg editors for mediawiki / wiki available?

  - by Eye of Hell

  Hello. Mediawiki is very good, but for programming tasks editing it via web is not very handy since wysiwyg is very limited, pressing 'edit' + 'publish' on any small change and waiting for page loading kins of annoying. I have seen alot of desktop wikis (personal wikis) that are free from such problems. The best example is a 'wikidpad' that has a usage patter of 'focus, edit wiki in-place, minimize'. This is very handy for programming work where you need to make small changes to wiki and documentation during development, and documentation is written much more often than readed :). But all such desktops wikies are personal - they don't have any wiki sharing (or marginally limited support for it). So, maybe it's a desktop application exists that can connect to mediawiki and allows to view and edit it via a rich wysiwyg editor? Any hints are welcomed.

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• postfix on same server as apache2 mysql php

  - by Sandro Dzneladze

  I've dedicated box that hosts wordpress blog with huge traffic. I need mail functionality for me and 2 other employees. I also need mail send capability for fail2ban and logwatch applications. I don't want to stress this box too much, so I wonder: How scure can postfix be? Will I stress server beyond needed with antivirus and mail filters? and postfix? Server is with 2gb ram, e5600 nothing fancy a simple pc.

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• Apache HttpClient making multipart form post

  - by Russ

  I'm pretty green to HttpClient and I'm finding the lack of (and or blatantly incorrect) documentation extremely frustrating. I'm trying to implement the following post (listed below) with Apache Http Client, but have no idea how to actually do it. I'm going to bury myself in documentation for the next week, but perhaps more experienced HttpClient coders could get me an answer sooner. Post: Content-Type: multipart/form-data; boundary=---------------------------1294919323195 Content-Length: 502 -----------------------------1294919323195 Content-Disposition: form-data; name="number" 5555555555 -----------------------------1294919323195 Content-Disposition: form-data; name="clip" rickroll -----------------------------1294919323195 Content-Disposition: form-data; name="upload_file"; filename="" Content-Type: application/octet-stream -----------------------------1294919323195 Content-Disposition: form-data; name="tos" agree -----------------------------1294919323195--

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• System.Interactive: Difference between Memoize() and MemoizeAll()?

  - by Joel Mueller

  In System.Interactive.dll (v1.0.2521.0) from Reactive Extensions, EnumerableEx has both a Memoize method and a MemoizeAll method. The API documentation is identical for both of them: Creates an enumerable that enumerates the original enumerable only once and caches its results. However, these methods are clearly not identical. If I use Memoize, my enumerable has values the first time I enumerate it, and seems to be empty the second time. If I use MemoizeAll then I get the behavior I would expect from the description of either method - I can enumerate the result as many times as I want and get the same results each time, but the source is only enumerated once. Can anyone tell me what the intended difference between these methods is? What is the use-case for Memoize? It seems like a fairly useless method with really confusing documentation.

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• J2EE: Default values for custom tag attributes

  - by Nick

  So according to Sun's J2EE documentation (http://docs.sun.com/app/docs/doc/819-3669/bnani?l=en&a=view), "If a tag attribute is not required, a tag handler should provide a default value." My question is how in the hell do I define a default value as per the documentation's description. Here's the code: <%@ attribute name="visible" required="false" type="java.lang.Boolean" %> <c:if test="${visible}"> My Tag Contents Here </c:if> Obviously, this tag won't compile because it's lacking the tag directive and the core library import. My point is that I want the "visible" property to default to TRUE. The "tag attribute is not required," so the "tag handler should provide a default value." I want to provide a default value, so what am I missing? Any help is greatly appreciated.

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• Gendarme Rules Customisation

  - by Apogee

  Does anyone know the correct way to explicitly specify which rules Gendarme will use? Or which rules to exclude? I'm not having a lot of joy searching the Mono documentation for the answer. What I'm trying to do is to specify the rules one by one in the Gendarme rules.xml file like this: <rules include="AvoidAssemblyVersionMismatchRule" from="Gendarme.Rules.BadPractice.dll"/> Doing this, I'm hoping we can then switch off the rules we don't care about. The problem is, after specifying all the rules in this way, I'm getting a different number of defects detected compared with when I use the default method Gendarme provides, which is of the form: <rules include="*" from="Gendarme.Rules.BadPractice.dll"/> <rules include="*" from="OTHER DLL NAMES"/> Has anyone done this before? Or can anyone point me in the direction of some Gendarme rules usage documentation?

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