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  • Simple C++ container class that is thread-safe for writing

    - by conradlee
    I am writing a multi-threaded program using OpenMP in C++. At one point my program forks into many threads, each of which need to add "jobs" to some container that keeps track of all added jobs. Each job can just be a pointer to some object. Basically, I just need the add pointers to some container from several threads at the same time. Is there a simple solution that performs well? After some googling, I found that STL containers are not thread-safe. Some stackoverflow threads address this question, but none that forms a consensus on a simple solution.

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  • Is there an ORM with APIs to be used programatically?

    - by Kabeer
    Hello. Neither did not get any response for my previous question, nor enough views :) So here I am now framing my query afresh. Is there any ORM that offers APIs to be used programatically? In my situation, a user will be helped through a wizard to define some entities. Thereafter those entites will be created in a database in form of tables (there will of course be some improvization). I need an ORM that offers APIs for modeling and creating entities during application runtime and not just during design time. Mine is a .Net application, therefore I was looking at Entity Framework. However, to me it looked tied to Visual Studio (I may be wrong also as I am new to it). Any recommendations? Or alternative point of view?

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  • How do I reset the state of a view inside a tabbar?

    - by ABeanSits
    Hello CocoaTouch-Experts! This is a fairly straightforward question though my Googling session gave me nothing. How do I reset the state of a view hierarchy located in a tabbar programmatically? The behavior I want to replicate is when the user tapps on a tab twice. This causes the view located under that tab to return to it's initial state. The tab is "owned" by a UINavigationController and when the user reaches a certain point in the view hierarchy there is a button which I want to connect this behavior to. All my attempts have failed except calling on a method in AppDelegate which kills the view and adds it back to the UITabBarController again. But this does not feel like the right way to go. Thanks in advance. Best regards //Abeansits

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  • is it possible to write data to a collection in wpf?

    - by randyc
    Hello. In looking through samples I have seen a number of examples where it is possible to present data within a wpf applicaiton by binding to collections. However I was wondering is it possible to write to a collection from an applicaiton. Say for example i have 2 or more fields such as names and I wanted to have hte ability to add up to three names in my application ( all stored in memory). Will collections serve this purpose. In the past with asp.net I have done this by creating data tables and storing values on the fly or during the session. I am trying to learn WPF and I was wondering if collections work in the same fashion? If so could you please post an example or point me to references that show examples of this? Thank you in advance.

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  • Check something before django server starts

    - by Vijay Shankar Kalyanaraman
    I am running my api behind a django server and say I have a one time token that is needed by the django application and used through out its existence until the process quits. To check if I can proceed and serve requests (using the django server) I need to validate this token against a database entry. Now, I can have a script that hits the db, then issues the run server command if the token is valid. But if the db used by the django applications change, I will have to change the script also to point to the same db. Is there a way I can pass this token into the runserver command as an additional parameter (along with hostname:port) and validate this before django serves any requests? How can I access this parameter that is sent into ./manage.py runserver. Thanks.

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  • How to include a Custom list in one Sharepoint site in to another as a web part?

    - by Rakhitha
    I have two share point web sites. One is a child web site of the other. For example if my first site is myweb1, other one is myweb1/myweb2. I have a custom list created in myweb1. I want to include that as a web part in number of web pages in both myweb1 and myweb1/myweb2 sites. Including the web part in the same site which contains the custom list is not a problem. But how do I include it in the other site. The web part does not show up in the list. I dont want to copy the content of custom list. I want pages in both sites that have included this list as a web part to be updated whenever the list content is changed. Any ideas?

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  • Sharepoint 2010 search: How to modify search query before submit (programmatically?)

    - by palgo
    Hi, I'm making a custom search box Web Part, similar to the OOTB Web Part from SharePoint (SearchBoxEx class). I'm interested in modifying the search query with additional text before it is submitted, based on a custom checkbox added on the Web Part. Any help on how I can achieve this? UPDATE: I've used the AppendToQuery and AppQueryTerms properties, but this will rewrite the text in the search box as well. I'm interested in passing the values "in the background", maybe as an extra parameter. Point is that the query modification should happen without the user seeing it explicitly.

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  • Storing a variable into a database

    - by Alekx
    In an attempt to better learn Rails and I'm building a simple Blackjack game, but I'm running into a problem of storing the variable. I understand how to store user-genereated data into the db using form_for, but I'm struggling to create a random number and put it in the db. @hand = rand(9) + 2 I have "hand" as a field in my db, just curious how to store this random number. Any help anyone could provide to point me in the right direction would be very much appreciated. Thanks.

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  • How to go about signing text in a verifiable way from within ruby in a simple yet strong & portable

    - by roja
    Guys, I have been looking for a portable method to digitally sign arbitrary text which can be placed in a document and distributed while maintaining its verifiable origin. Here is an example: a = 'some text' a.sign(<private key>) # => <some signature in ASCII format> The contents of a can now be distributed freely. If a receiver wants to check the validity of said text they can do the following: b = 'some text' b.valid(<public key>, <signature supplied with text>) # => true/false Is there any library out there that already offers this kind of functionality? Ruby standard library contains SHA hashing code so at lest there is a portable way to perform the hashing but from that point I am struggling to find anything which fits purpose. Kind Regards, Roja

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  • How to use rvm (ruby version manager) with root account?

    - by Jade
    The whole point of rvm is to be able to install multiple rubies and access them from a user account. What do you do when you need to access any of those rubies from root? Or use gems installed in one of those rvms? Is there an elegant (or even hackish) way to use these I haven't considered? My guess is that I should just add it to my PATH, but I'm curious if anyone has come up with a better idea. I'd rather not install rvm just for the root account and duplicate everything.

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  • MySQL UpdateXML with automatic node inserting?

    - by JimPsr
    I am writing an application that supports custom fields. Currently I store all custom fields in a XML formated text field ( e.g. '<root><field1>val1</field1><field2>val2</field2></root>' in cust_field) I am able to to use updateXML(cust_field, '/root/field1', '<field1>new value</field1') to update those values, however if I use updateXML(cust_field, '/root/field3', '<field3>new value</field3>') then it does not work since field3 is not in the old value. Is there a way to let MySQL automatically insert the new field3 node and its value into cust_field? I am thinking about stored procedure or even stored function but not familiar with both, can anyone point me to the right direction?

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  • Clearing a default value in a search box with jQuery

    - by james6848
    Hi, Can't seem to achieve this simple functionality! All I want is to clear a default search term in an input box when it is clicked. The following works up to a point but clears any other text entered, I would've thought resetting search_form_text should have solved this: search_form_text = $('#block-search-0 #edit-search-block-form-l').attr('value'); if (search_form_text == 'Enter search keywords here') { $('#block-search-0 #edit-search-block-form-l').click(function() { $('#block-search-0 #edit-search-block-form-l').attr('value', ''); search_form_text = ''; }); } Hmmmm... :)

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  • Is there a way to launch an aggressive and complete garbage collection in Java?

    - by Gnoupi
    For memory optimization reasons, I'm launching myself the garbage collector during profiling, to check if objects are correctly cleaned after disposing of them. The call to garbage collector is not enough, though, and it seems that there is no guarantee of what it will clean. Is there a way to call it, to be sure it will recover as much as it can, in profiling conditions (this would have no point in production, of course)? Or is "calling it several times" the only way to be "almost sure"? Or did I simply misunderstand something about the Garbage Collector?

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  • Magento - How can I move the Navigation Block to be in the right column?

    - by Hank
    I've been editing Magento's default CSS to change the look and have come to a point where I want to move around some content blocks. I've killed off the left column through CSS .col-left { display: none; } And then increased the width of the main content part to create a 'two column layout'. What I want to do now is move the navigation for the categories into the right column. I just have no idea how... How do I move content blocks around in Magento? :/

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  • Android: The concept for detecting changes of an opened file

    - by niko
    I wrote an application for video recording which stores the recording to a file. Currently I am looking for a way to implement some kind of "listener" to listen for file changes. The concept I would like to implement is the following: Check the file on a set period of time (for example one second), extract changes (get the data that was written in the last period) and do something with these data. I would be very thankful if anyone of you could give any suggestion or point to any useful resource that could help to solve the given problem.

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  • 4GB limitation on these embedded/express DBs good enough? what's next if limitation is reached?

    - by edwin.nathaniel
    I'm wondering how long a (theoretically) desktop-app can consume the full 4GB limitation of these express/embedded database products (SQL-Server Express, Oracle Express, SQLite3, etc) provided that big blobs will be stored in filesystem. Also what would be your strategy when it hits the 4GB? Archive the old DB Copy 1-3 months of data to the new DB (consider this as cache strategy?) Start using the new DB from this point onward (How do you access the old data?) I understand that the answer might varies depending on how much data you stored in the table/column. But please describe based on your experience (what kind of desktop-app, write/read heavy, how long will it reach according to your guess).

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  • Interacts with dialog/whiptail on early boot rcX.d stage?

    - by nm
    Hi buddies, I'm developing on Ubuntu based, actually I got one script in-charged on GUI(console) setup. It runs before another scripts (rcX.d) start. Currently, I installed this script on rc2.d and start earlier than other ones. But when run on real machine, I can't input any keystroke on "dialog --inputbox" or whiptail through shell script. Additionally, It runs well on my Virtual Machine (Virtual Box and Vmware), that's so strange! So, does anybody give some help or point me any clues for overcome this ? Thanks

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  • Setup Jetty 7 with JSP engine

    - by Justin
    I've been trying to get Jetty to run my web app via a custom launcher (embedded). I am trying to figure out how to tell Jetty which java compiler to use for JSPs. I want to do what java -jar start.jar -OPTIONS=jsp does, but without using start.jar. Here is what shows on the console: Javac exception, Unable to find a javac compiler; com.sun.tools.javac.Main is not on the classpath. Perhaps JAVA_HOME does not point to the JDK Do I need to put the javac libraries into my classpath?

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  • Even lighter than SQLite

    - by Richard Fabian
    I've been looking for a C++ SQL library implementation that is simple to hook in like SQLite, but faster and smaller. My projects are in games development and there's definitely a cutoff point between needing to pass the ACID test and wanting some extreme performance. I'm willing to move away from SQL string style queries, allowing it to be code driven, but I haven't found anything out there that provides SQL like flexibility while also preferring performance over the ACID test. I don't want to go reinventing the wheel, and the idea of implementing an SQL library on my own is quite daunting, even if it's only going to be simple subset of all the calls you could make. I need the basic commands (SELECT, MODIFY, DELETE, INSERT, with JOIN, and WHERE), not data operations (like sorting, min, max, count) and don't need the database to be atomic, or even enforce consistency (I can use a real SQL service while I'm testing and debugging).

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  • mod_rewrite with GET requests

    - by iMaster
    I have mod_rewrite working on most of my site. Right now I have a search that normally would point to search.php?keyword=KEYWORD And I'm trying to rewrite that to search/?keyword=KEYWORD Just to make it a little bit cleaner. So here's my mod_rewrite. (There are other rules I'm just posting the one that isn't working.) RewriteRule ^search/?keyword=([^/\.]+)/?$ search.php?search=$1 When I type a search in the address bar way I want it to be, I get a page telling me its a "broken link" (I'm guessing that that's Chrome's equivalent of a 404 error). So what am I doing wrong? I think that the problem is the '=' or the '?' sign in the rule (the first part) because when I take the ?keyword= part out, it works. Does that make sense?

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  • Association in Entity Framework 4

    - by Marsharks
    I have two tables, a problem table and a problem history table. As you can expect, a problem can have many histories associated with it. CREATE TABLE [dbo].[Problem]( [Last_Update] [datetime] NULL, [Problem_Id] [int] NOT NULL, [Incident_Count] [int] NULL ) ALTER TABLE [dbo].[Problem] ADD CONSTRAINT [PK_Problem] PRIMARY KEY CLUSTERED ( [Problem_Id] ASC ) CREATE TABLE [dbo].[Problem_History]( [Last_Update] [datetime] NULL, [Problem_Id] [int] NOT NULL, [Severity_Chg_Flag] [char](1) NULL ) ALTER TABLE [dbo].[Problem_History] ADD [Create_DateTime] [datetime] NOT NULL ALTER TABLE [dbo].[Problem_History] WITH CHECK ADD CONSTRAINT [FK_Problem_History_Problem] FOREIGN KEY([Problem_Id]) REFERENCES [dbo].[Problem] ([Problem_Id]) The problem is when I drag this into an Entity Model, the associations are not included. Any ideas? I would like to point out that the problem history table has no separate key of its own, it shares the problem id

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  • Applying transformations to NSBitmapImageRep

    - by Adam
    So ... I have an image loaded into an NSBitmapImageRep object, so I am able to examine the contents of specific pixels via a two dimensional array. Now I want to apply a couple of "transformations" to the image, in preparation for some additional processing. If I was manipulating the image manually, in Photoshop, I would: Rotate the image Crop a portion of it and discard the rest Apply a "threshold" transformation (which essentially converts the image to black and white, based on the threshold value I provide) Resample the image to shrink it down a bit (which, although losing some image quality, will speed up the subsequent processing) (not necessarily in that order) Are there objective C methods available to facilitate these specific image manipulations, with the data in the NSBitmapImageRep object? If so, can someone point me to some good examples?

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  • What causes a UIViewController to become active?

    - by Rob Bonner
    I am sure this is an easy question, but one that has escaped me for some time now. Say I have a UIViewController, either defined as a root in an XIB or on a stack. At some point in my code I want to replace it with another view controller. Just flat out replace it. How would I do that? I have tried defining the controller and assigning, but not sure what actually makes it push on the screen with the absence of a navigation controller.

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  • visual studio 2005 problem with windows flying open

    - by Kevin
    I'm going through the problem of setting up a new computer and I'm having a problem with VS 2005. Whenever I start debugging all the windows (properties, watch, errorlist, stack, ...) pop up all over the place undocked. At this point I've tried docking them and closing them. When I stop debugging more windows pop up all undocked. This keeps happening over and over and over... I've tried closing and docking them but they keep popping out. Wasn't sure how to google this and my patience has grown thin with this whole process of moving to a new comp. Sincerely, Frustrated

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  • Image animation stops on minimizing and restoring

    - by lc
    I have a .NET WinForms application with an animated GIF in a PictureBox. It's a loading animation, shown while a BackgroundWorker does some processing in another thread. I load the image by setting the Image property and it animates on its own. All is fine until I minimize and restore the application. At which point, the image stops animating and just displays whatever frame it was last on. Note that: The background thread still runs fine and none of the "business" of the application is affected. Subsequently-displayed animated GIFs do work fine (unless the application is minimized again). Does anyone know what causes this problem? Any workarounds?

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