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• Good way to "wrap" jars for OSGi with Maven

  - by javamonkey79

  I was looking at the PAX tools on OPS4J for example: this one and I thought I'd found a nice way to: Specify an artifact Create an assembled jar (jar that contains all dependencies) from that jar and it's transitive dependencies Wrap it with BND to create an OSGi bundle It turns out, that I was wrong - it doesn't appear that the PAX stuff does this. (RTFM, right? :) ) But this got me wondering: is there something out there that does what I'm asking? I've thought maybe I could do this by creating a simple POM and using the maven-bundle-plugin but this seems like it might be a bit cumbersome for what I'm asking. NOTE: I get that embedding and assembling jar's is not really "the OSGi way" - so I wouldn't do this unless I really felt it useful. For example - Spring. Thanks in advance.

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• Why does C's "fopen" take a "const char *" as its second argument?

  - by Chris Cooper

  It has always struck me as strange that the C function "fopen" takes a "const char *" as the second argument. I would think it would be easier to both read your code and implement the library's code if there were bit masks defined in stdio.h, like "IO_READ" and such, so you could do things like: FILE* myFile = fopen("file.txt", IO_READ & IO_WRITE); Is there a programmatic reason for the way it actually is, or is it just historic? (i.e. "That's just the way it is.")

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• GitHub on windows :|

  - by Sonic Soul

  i've been experimenting with github as my personal code rep.. and it has been a bit of a disaster with windows. i've used Subversion, CVS, and Perforce in the past.. none were as annoying to use as github. i've figured out the PGP part, although my workstation no longer lets me check in, and after searching around it turns out that github bash is using putty which is not that reliable and should be configured with something else.. i was not able to configure it with windows shell extension for a nice visual of what is part of the repository, what is modified, and easy check ins, and easy pushes.. has anyone successfully configured some kind of windows shell client and can efficiently and quickly synchronize various machines? It just seems to be more pain to use than it is worth..

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• need to query MongoDB using php

  - by Mario Villarroel

  I need to query mongodb with something like this: ("something" < X OR "something" = "nll") AND ("someother"X OR "someother"= "nll") AND z=$z AND s=1 I've tried a few things, but can't get it to work, this is what I've tried: find( array( '$or'=array(array("something"=array("$le",$X)),array("something"="nll")), '$or'=array(array("someother"=array("$ge",$X)),array("someother"="nll")) )) But that's getting me the OR overwritten, so I'm lost on that... After diggin a bit more, I assembled this code that seems to be what I need, but doesn't work either: find( array('$and'=array( array( '$or' = array( array("something"=array('$gte'=$X)),array("something"="nll"))), array('$or' = array( array("someother"=array('$lte'=$X)),array("someother"="nll")))),"Z"=$z, "s"="1"); But this doesn't work as it returns zero results and I know for sure that there are more than 2 items that match on the db. (100% certain)

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• What are the advantages to use StringBuilder versus XmlDocument or related to create XML documetns?

  - by Rob

  This might be a bit of a code smell, but I have seen it is some production code, namely the use of StringBuilder as opposed to XmlDocument when creating XML documents. In some cases these are write once operations (e.g. create the document and save it to disk) where as others are passing the built string to an XmlDocument to preform an XslTransform to a document that is returned to the client. So obvious question: is there merit to doing things this way, is it something that should be done on a case-by-case basis, or is this the wrong way of doing things?

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• How to extend a website?

  - by eltados

  This is quite a concept idea. I would like to create a website that can be extend by different programmer a bit "a la facebook" Let's me explain i want to develop a very simple core application that for example would store images and i want to develop or allow external developer to develop web app that would be able to act on the image i can take this example of an OS that would store files and you can "install" different program for example to view the files or edit. How can i reproduce the model in the Web / cloud plateform using API ? I hope this question make sense to any body. Thank you by advance

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• How do I include extremely long literals in C++ source?

  - by BillyONeal

  Hello everyone :) I've got a bit of a problem. Essentially, I need to store a large list of whitelisted entries inside my program, and I'd like to include such a list directly -- I don't want to have to distribute other libraries and such, and I don't want to embed the strings into a Win32 resource, for a bunch of reasons I don't want to go into right now. I simply included my big whitelist in my .cpp file, and was presented with this error: 1>ServicesWhitelist.cpp(2807): fatal error C1091: compiler limit: string exceeds 65535 bytes in length The string itself is about twice this allowed limit by VC++. What's the best way to include such a large literal in a program?

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• Listing like appstore in firefox or any other browser for windows/desktop linux

  - by jenso

  A little question about the listing in iPhone OS and some other applications, and possibly in Android Market. When listing the apps, it fills the list in an automatic process, when reaching or is near to reach the end. My question is: How is that written in iPhone applications. But the main question is: Is that possible to make for Firefox users with Javascript, Ajax or possibly any other language? Been looking a little bit in documentation but havent found anything useful, maybe I just havent looked enough edit: Found it for Android - http://stackoverflow.com/questions/1917773/dynamic-listview-in-android-app Still looking for same futures for a Windows browser tho out

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• Is it okay to truncate a SHA256 hash to 128 bits?

  - by Sunny Hirai

  MD5 and SHA-1 hashes have weaknesses against collision attacks. SHA256 does not but it outputs 256 bits. Can I safely take the first or last 128 bits and use that as the hash? I know it will be weaker (because it has less bits) but otherwise will it work? Basically I want to use this to uniquely identify files in a file system that might one day contain a trillion files. I'm aware of the birthday problem and a 128 bit hash should yield about a 1 in a trillion chance on a trillion files that there would be two different files with the same hash. I can live with those odds. What I can't live with is if somebody could easily, deliberately, insert a new file with the same hash and the same beginning characters of the file. I believe in MD5 and SHA1 this is possible.

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• MediaElement seems to disable lock screen when playing a video

  - by CrossProduct

  I am working on an application that plays a video using the MediaElement component. Now, I would like that if the user is idle, the lock screen appears, as configured by the user in the Settings of the device. If I don't play a video, the lock screen indeed appears. But, when a video is playing no lock screen appears. I cannot find any information on this. Currently I set the idle detection modes like this: PhoneApplicationService.Current.ApplicationIdleDetectionMode = IdleDetectionMode.Enabled; PhoneApplicationService.Current.UserIdleDetectionMode = IdleDetectionMode.Enabled; I am a bit lost now. The only solution I can think of is running a timer myself and stop the video playback after a certain time. (but there seems to be no API calls to receive the configured lock timeout.) Any suggestions are welcome, thanks.

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• Enabling depth testing when using CAOpenGLLayer

  - by Andrew

  If one is using a subclass of NSOpenGLView then one enables depth testing by selecting a 16/24/32 bit buffer from the attributes menu in Xcode, and then adding glEnable(GL_DEPTH_TEST); glClear(GL_DEPTH_BUFFER_BIT); to the drawRect method. However, in the application I'm creating I'm rendering OpenGL content via the drawInCGLContext method of a CAOpenGLLayer which is contained within a subclass of NSView. This means that it is no longer possible to create a depth buffer via the inspector. Does anyone know how I can achieve this in such a situation?

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• When compiling programs to run inside a VM, what should march and mtune be set to?

  - by Russ

  With VMs being slave to whatever the host machine is providing, what compiler flags should be provided to gcc? I would normally think that -march=native would be what you would use when compiling for a dedicated box, but the fine detail that -march=native is going to as indicated in this article makes me extremely wary of using it. So... what to set -march and -mtune to inside a VM? For a specific example... My specific case right now is compiling python (and more) in a linux guest inside a KVM-based "cloud" host that I have no real control over the host hardware (aside from 'simple' stuff like CPU GHz m CPU count, and available RAM). Currently, cpuinfo tells me I've got an "AMD Opteron(tm) Processor 6176" but I honestly don't know (yet) if that is reliable and whether the guest can get moved around to different architectures on me to meet the host's infrastructure shuffling needs (sounds hairy/unlikely). All I can really guarantee is my OS, which is a 64-bit linux kernel where uname -m yields x86_64.

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• Why is Decimal('0') > 9999.0 True in Python?

  - by parxier

  This is somehow related to my question Why is ''0 True in Python? In Python 2.6.4: >> Decimal('0') > 9999.0 True From the answer to my original question I understand that when comparing objects of different types in Python 2.x the types are ordered by their name. But in this case: >> type(Decimal('0')).__name__ > type(9999.0).__name__ False Why is Decimal('0') > 9999.0 == True then? UPDATE: I usually work on Ubuntu (Linux 2.6.31-20-generic #57-Ubuntu SMP Mon Feb 8 09:05:19 UTC 2010 i686 GNU/Linux, Python 2.6.4 (r264:75706, Dec 7 2009, 18:45:15) [GCC 4.4.1] on linux2). On Windows (WinXP Professional SP3, Python 2.6.4 (r264:75706, Nov 3 2009, 13:23:17) [MSC v.1500 32 bit (Intel)] on win32) my original statement works differently: >> Decimal('0') > 9999.0 False I even more puzzled now. %-(

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• Using XTemplate with SimpleStore in Ext

  - by qui

  I am currently adding some functionality to some old code. There used to be a template which took a flat array of items and spat out some HTML, now the data is coming from a simple store which reads some JSON.. var allwords = [ ['abacteriano', 'abacteriano'], ['abacterial', 'abacteriano'], ['abciximab', 'abciximab'], etc.. So my simplestore goes like this: termStore = new Ext.data.SimpleStore({ fields: ['term', 'lookup'], data: allwords }); This definitly works fine as I use the termStore in a combobox. However I am having difficulty getting it to play with an XTemplate. It seems the syntax in extjs doesn't play well with SO, so this bit wont be in a code block... So I guess I'll describe it :p Essentially its a simple template which tries to get values out of the passed collection by doing {term} I then try and apply it by doing: tpl.overwrite(Ext.get("contentbox"), termStore); This gives me a JS error of "invalid object initializer"

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• VB.Net List.Find. Pass values to predicate

  - by Beta033

  Having a bit of trouble using the List.Find with a custom predicate i have a function that does this private function test () Dim test As Integer = keys.Find(AddressOf FindByOldKeyAndName).NewKey here's the function for the predicate Private Shared Function FindByOldKeyAndName(ByVal k As KeyObj) As Boolean If k.OldKey = currentKey.OldKey And k.KeyName = currentKey.KeyName Then Return True Else Return False End If End Function by doing it this way means i have to have a shared "currentKey" object in the class, and i know there has to be a way to pass in the values i'm interested in of CurrentKey (namely, keyname, and oldkey) ideally i'd like to call it by something like keys.Find(AddressOf FindByOldKeyAndName(Name,OldVal)) however when i do this i get compiler errors. How do i call this method and pass in the values?

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• helink dll to executable

  - by user353707

  How can I link the .dll file to an executable? I do not have the source for the dll nor executable. The two files operate on a 64-bit system. When the executable is ported from another system, I get "The application failed to initialize properly (0xc0150002). Click OK to Terminate the program. Here's a list of the files \l2server\L2Server.exe \l2server\l2serverx64-dll.dll \l2server\Sabotage64.dll L2Server requires l2serverx64-dll.dll to execute. What i'm trying to do is to link Sabotage64.dll with L2Server.exe I used CFF Explorer as a rebuilder to no luck :(

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• Removing duplicate SQL records to permit a unique key

  - by j pimmel

  I have a table ('sales') in a MYSQL DB which should have rightfully have had a unique constraint enforced to prevent duplicates. To first remove the dupes and set the constraint is proving a bit tricky. Table structure (simplified): 'id (unique, autoinc)' product_id The goal is to enforce uniqueness for product_id. The de-duping policy I want to apply is to remove all duplicate records except the most recently created, eg: the highest id Or to put another way, I would like to delete duplicate records, excluding the ids matched by the following query: select id from sales s inner join (select product_id, max(id) as maxId from sales group by product_id having count(product_id) > 1) groupedByProdId on s.product_id and s.id = groupedByProdId.maxId I've struggled with this on two fronts - writing the query to select the correct records to delete and then also the constraint in MYSQL where a subselect FROM clause of a DELETE cannot reference the same table from which data is being removed.

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• What is the "task" in twitter Storm parallelism

  - by John Wang

  I'm trying to learn twitter storm by following the great article "Understanding the parallelism of a Storm topology" However I'm a bit confused by the concept of "task". Is a task an running instance of the component(spout or bolt) ? A executor having multiple tasks actually is saying the same component is executed for multiple times by the executor, am I correct ? Moreover in a general parallelism sense, Storm will spawn a dedicated thread(executor) for a spout or bolt, but what is contributed to the parallelism by an executor(thread) having multiple tasks ? I think having multiple tasks in a thread, since a thread executes sequentially, only make the thread a kind of "cached" resource, which avoids spawning new thread for next task run. Am I correct? I may clear those confusion by myself after taking more time to investigate, but you know, we both love stackoverflow ;-) Thanks in advance.

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• C++ Beginner - Best way to read 3 consecutive values from the command line?

  - by Francisco P.

  Hello everyone, I am writing a text-based Scrabble implementation for a college project. The specification states that the user's position input must be read from single line, like this: Coordinates of the word's first letter and orientation (<A – P> <1 – 15> <H ou V>): G 5 H G 5 H is the user's input for that particular example. The order, as shown, must be char int char. What is the best way to read the user's input? cin >> row >> column >> orientation will cause crashes if the user screws up. A getline and a subsequent string parser are a valid solution, but represent a bit of work. Is there another, better, way to do this, that I am missing? Thanks for your time!

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• Calculating terrain height in 3d-space

  - by Jonas B

  Hi I'm diving into 3d programming a bit and am currently learning by writing a procedural terrain generator that generates terrain based on a heightmap. I would also want to implement some physics and my first attempt at terrain collision was by simply checking the current position vs the heightmap. This however wont work well against small objects as you'd have to calculate the height by taking the heightdifference of the nearest vertices of the object and doing this every colision check is pretty slow. Beleive me I tried googling for it but there's simply so much crap and millions of blogs posting ripped-of newbie tutorials everywhere with basically no real information on the subject, I can't find anything that explains it or even names any generally used techniques. I'm not asking for code or a complete solution, but if anyone knows a particular technique good for calculating a high-res heightmap out of the already generated and smoothed terrain I would be very happy as I could look into it further when I know what I'm looking for. Thanks

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• Adding dlls in VS 2008

  - by Bart

  Hello, i would like to add some external .dll libraries e.g. glut32.dll (but it's only example) in vs 2008 using C#. Can you please tell me what should i do step by step? i am a little bit confused cause i found a lot of solutions to add dll files but they significantly differ.. some of them add dll's only using code, some using properties in vs, add references and in other tutorials there is about registering dlls in system. But how to put it all together? Regards!

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• Advanced search functionality

  - by Chris

  I have a website with a jQuery based autocomplete search functionality which works great. Currently though I have just one search box for all categories, what I want is for someone to be able to type in, say for example, dorian gray dvd (in any order) which will search for dorian gray within the dvd category. What this will require then is a bit of magic on the server side to figure out if any of the words are category keywords, and then limit the search by that. What is the best (and quickest) way to do this in PHP / MySQL? I currently have a few trains of thought Search the category table for matches and perhaps order the results by that. Or split up the search terms into an array and separately search the categories for that for a match. Another thought I just had is to concat the category title to the dvd title in the database and match against that, or something similar... but this sounds computationally expensive? Any advice?

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• .NET & ASP vs PHP

  - by gargantaun

  Earlier today I asked wether it would be a good idea to develop websites using C#. Most of the answers pointed towards .NET and ASP. Currently I develop with PHP. I've dabbled with Python and RoR but I always come back to PHP. This is the first time I've looked at .NET and ASP. A bucket load of Google searches later I'm not really seeing much support for ASP online but then it all seems a bit Biased towards PHP/Apache/MySQL. It looks like there's a fair amount of .NET and ASP folk around here so I figured it's worth a shot asking for their input in attempt to try and address the balance in my own head. It can't all be bad. What advantages are there to .NET and ASP over PHP?

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• Highlight polygon and tint rest of map using Google Maps

  - by Haes

  Hi, I'd like to display a highlighted polygon using Google Maps. The idea is that the polygon in question would be displayed normally and the rest of the map should be darkened a little bit. Here's an example image what I would like to accomplish with a polygon from Austria: Unfortunately, I'm a complete rookie when it comes to Google Maps API's and map stuff in general. So, is this even possible do this with Google Map API's? If yes, with what version (v2, v3)? Would it be easier to do it with other map toolkits, like openlayers? PS: One idea I had, was to build an inverse polygon (in this example, the whole world minus the shape of austria) and then display a black colored overlay with transparency using this inverted polygon. But that seems to be quite complicated to me.

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• Pre-Pre-build Steps in Hudson....

  - by Spedge

  Hey, I'm in a bit of a pickle. I'm trying to run some environmental scripts before I run the build in a m2 project, but it seems no matter how hard I try - the 'pre' build script are never run early enough. Before the 'pre-build' scripts are run, the project checks to see if the correct files are in the workspace - files that won't be there until the scripts I've written are executed. To make them 'pre-build', I'm using the M2 Extra Steps plugin - but's it's not 'pre' enough. Has anyone got any suggestions as to how I can carry out what I want to do? Cheers.

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