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• Explaining persistent data structures in simple terms

  - by Jason Baker

  I'm working on a library for Python that implements some persistent data structures (mainly as a learning exercise). However, I'm beginning to learn that explaining persistent data structures to people unfamiliar with them can be difficult. Can someone help me think of an easy (or at least the least complicated) way to describe persistent data structures to them? I've had a couple of people tell me that the documentation that I have is somewhat confusing. (And before anyone asks, no I don't mean persistent data structures as in persisted to the file system. Google persistent data structures if you're unclear on this.)

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• Getting 'error while loading shared libraries' when using -L to specifically find the library.

  - by e5

  I've been trying to solve this for a few hours now. I am compiling some c files using gcc. The files require libpbc, so I am using the -L flag to point gcc at the directory which contains libpbc.so.1. The code compiles without error yet when I attempt to run it I get the following error message: ./example.out: error while loading shared libraries: libpbc.so.1: cannot open shared object file: No such file or directory Looking at similar questions this error message seems to indicate that gcc can't find libpbc.so.1. I know gcc sees libpbc.so.1 because when I rename libpbc.so.1 to something else it fails to compile. I am using -L to point to the directory which contains libpbc.so.1. Not sure what next steps I can take to figure this out. Would appreciate any ideas. What does this error message mean exactly?

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• Does the Fetch Request do the recommended batch faulting?

  - by dontWatchMyProfile

  I'm curious. Apple says in the docs: Core Data automatically fires faults when necessary (when a persistent property of a fault is accessed). However, firing faults individually can be inefficient, and there are better strategies for getting data from the persistent store (see “Batch Faulting and Pre-fetching with the SQLite Store”). NSFetchRequest has this feature: [fetchRequest setFetchBatchSize:20]; Is this essentially performing such a batch faulting like recommended? Just to make this clear for others, faulting does not mean "turning into a fault" but it means "materializing it", just like "making a Scooby-Doo out of it". Pretty ugly wording error, in my opinion, but it's at least consistent in the docs ;)

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• How to setup terminal service gateway in my RDP client

  - by Stan

  I am using "RD Tabs" to bypass the terminal service gateway to RDP to the remote host. Usually I use browser and go to https://webvpn.company.com:777 with my account. Now in RD Tabs advanced settings, it's asking server name and authentication method. How should I fill this information? I tried below: server: webvpn.company.com:777 authentication: Attempt TLS But it's not working, what could be wrong? Thanks.

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• I do not write tests. Am I stupid?

  - by Josh Stodola

  I've done a little bit of reading on unit testing and TDD, and I've never seriously considered writing tests to such a precise extent. Granted, I am not working on any projects that are ridiculously huge. If all I build are small apps, am I stupid for not writing tests? Edit: To clarify, when I say "small apps", I mean apps that are not going to control a persons life and/or their belongings. I generally build things that are supposed to make peoples lives easier and to make them more efficient.

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• How to open window pop-up from Silverlight Out-of-Browser?

  - by Jeaffrey Gilbert

  I need to open window pop-up from Silverlight Out-of-Browser application. I've added parameter <param name="enablehtmlaccess" value="true" /> in Index.html, but executing this from code behind: HtmlPage.Window.Navigate(new Uri(myUrl), "_blank", myFeatures); still returns error: Silverlight OOB Error: The DOM/scripting bridge is disabled. I've read about this post, does it mean that I can't open pop-up from OOB? Why I need to do this, because actually I've shown the HTML page in OOB Silverlight by WebBrowser control within ChildWindow but when I click an anchor in HTML page, which linked to _blank page, it jumps to my default browser. It doesn't meet the requirement, except launch that HTML index page also in default browser at the first time, triggered from button control in OOB Silverlight. Is that possible? Please advice, thanks.

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• JPA query for getting the whole tree

  - by Javi

  Hello, I have a class which models all categories and they can be ordered hierarchically. @Entity @Table(name="categories") public class Category { @Id @GeneratedValue(strategy=GenerationType.SEQUENCE, generator="sequence") @SequenceGenerator(name="sequence", sequenceName="categories_pk_seq", allocationSize=1) @Column(name="id") private Long id; @Column private String name; @OneToOne @JoinColumn(name="idfather") private Category father; } I need to get all categories ordered hierarchically (I mean every father followed by its children and fathers ordered alphabetically on each level) as they could be made for example with PRIOR in oracle. Is it possible to do this with a JPA Query (not a SQL one)? Thanks.

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• IE browser doesn't close and file download popup needs focus

  - by jkranthi

  Hii all , I am trying to to click on a link after it is active which again produces a popup ( file download) after clicking. Here i have 2 problems 1) I start the code and leave it .what the code does is -after long process -it waits for the link to be active .Once the link is active it clicks on the link and a download popups opens (if everything goes well) and then it hangs there ( showing yellow flashing in the task bar which mean i have to click on the explorer for it to process whatever is next ).every time i have to click on the IE whenever the download popup appears .Is there a way to handle this or am i doing some wrong ? 2) The next problem is even if i click on the IE .the IE doesn't get close even though i write ie.close . my code is below : ## if the link is active ie.link(:text,a).click_no_wait prompt_message = "Do you want to open or save this file?" window_title = "File Download" save_dialog =WIN32OLE.new("AutoItX3.Control") save_dialog.WinGetText(window_title) save_dialog_obtained =save_dialog.WinWaitActive(window_title) save_dialog.WinKill(window_title) # end #' #some more code -normal puts statements # ie.close ie is hanging up for some strange reason ..?

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• DNS Lookup in ASP / ASP.Net

  - by Dave Forgac

  I have a Windows server that is intermittently losing the ability to lookup DNS information. I'm trying to get to the root cause of the problem but in the mean time I'd like to be able to monitor whether the server can perform lookups. Basically, it should attempt to lookup some common hostnames and the display 'Success' if the lookups are successful. I see lots of examples of doing this with third party components in ASP but I would prefer to be able to do this with a single ASP / ASP.Net script that would be portable and not require anything additional be installed.

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• What is the big deal with SSL?

  - by xarzu

  What is the big deal with SSL? My interenet website hosting provider has sold me an SSL line. All I know is that for what I want to do with PayPal, I need to have a folder that is denoted beginning with https:// and this is what an SSL line is. But it seems that they have a hard time setting it up. I wonder if I can just go ahead and do it for myself. I mean, some third party has send me confirmation and even what seems to be some sort of long numeric certificate.

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• Extend partition windows powershell

  - by user128364

  I want to create a Windows Powershell script to extend my partition through WMI (remotely), IP Address of my host id 10.10.10.10 $pass = convertto-securestring "abc123#" -asplaintext -force $mycred = new-object -typename System.Management.Automation.PSCredential -argumentlist "10.10.10.10\Administrator",$pass Invoke-Command -ComputerName 10.10.10.10 -Credential $myCred -ScriptBlock {"rescan","select volume 2","extend" | diskpart} Do we have any method with use of Invoke-Wmimethod

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• Java - JTable multiple instances

  - by Brian

  I have a JTable that gets data added to it from another JTable. Now I want to switch between JTables according to the day selected in a JComboBox. For example, if I choose Monday I add programs added to it then I select Tuesday from the JComboBox and a fresh JTable appears. If I go to Monday again the programs should still be there (until the program is closed). How do I create multiple JTables (the JTable remains the same) for the days and let the info remain there until program closure? Here is an example to show you what I mean:

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• Will more CPUs/cores help with VS.NET build times?

  - by LoveMeSomeCode

  I was wondering if anyone knew whether Visual Studio .NET had a parallel build process or not? I have a solution with lots of projects, every project has lots of markup/code, lots of types, etc. Just sitting there with intellisense on runs it up to about 700MB. But the build times are really slow and only seem to max out one of my two cpu cores. Does this mean the build process is single threaded? My solution's build dependency chain isn't linear, so I don't see why it couldn't be building some of the projects in parallel. I remember Joel Spolsky blogging about his new SSD, and how it didn't help with compile times, but he didn't mention which compiler he was using. We're using VS 2005. Anyone know how it's compilation works? And is it any different/better in 2008/2010?

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• Cure for puzzle piece programming habits?

  - by Recursion

  Even though I went to a decent CS school, I was still taught with the mentality of programming with puzzle pieces. By puzzle pieces I mean, looking up code segments at each step of the development process and adding them together as needed. Eventually gathering all of the pieces and having a properly working program. So as an example, if in my program the next step is to tokenize a string, I go to google and search "how do I tokenize a string in language". All instead of critically thinking about its implementation. I personally don't think its a very good way to program and I always seem to forget everything that I have searched for. So how can I get out of this puzzle piece mode of programmer that I was taught.

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• Looking for a free tool to visualize object relationships for C#

  - by vfilby

  Here is my ideal solution: a free tool that reads a .csporj or .sln and generates a pretty picture that shows all the objects and how they are related. By relationships, I don't mean inheritance but rather dependency. For example, if we have a Car object and Car has a member variable Wheel, I would like that Car depends on Wheel to be visualized in the graph. I know visual studio can do inheritance graphs, but that is only half of what I am looking for. Is what I am looking for possible? Are there any tools that do something similar? Related question for java: http://stackoverflow.com/questions/1824261/are-there-any-tools-to-visualize-the-objects-being-used-in-a-program

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• How to generate semi transparent shapes in php using gdlib

  - by fabbrillo

  Hi, this is the script i made // Create image $img = imagecreatetruecolor($w, $h); // Transparent image $white = imagecolorallocate($img,255,255,255); imagefilledrectangle($img,0,0,$w,$h,$white); imagecolortransparent($img, $white); //imagealphablending( $img, true ); //imagesavealpha( $img, true ); // Shape color $bgColor = imagecolorallocatealpha($img, 100, 250, 250, 70); imagefilledrectangle($img, 15, 20, 50, 100, $bgColor); imagefilledrectangle($img, 10, 25, 60, 100, $bgColor); imagepng($img, 'file.png'); the problem is the rectangles are transparent among them but not with the background i mean, i need to create a transparent image with a semi transparent shape inside any suggestions? thanks for your help

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• jQuery - ASPX Security libraries

  - by Jean Paul

  Hello. I would like to know if there's a combo like jCryption ([jCryption]) - PHP but for jQuery - ASPX. I mean, I have been searching for a combo to send data both ways (Client-server, server-client) with jQuery to ASPX. The best I found was jCryption that sends data from JavaScrpit to PHP. I need a combo to send data from JavaScrpit to ASPX. Any ideas?? PD: Please don't tell me to use HTTPS, it's not enough to ensure the data communication on a client - server application.

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• django file upload in 2 steps

  - by alexarsh

  Hi, I want to upload a file in 2 steps. First I want to upload it and show the errors and on the second step I want actually to save the file data in the database. So I made a simple form and my problem is how to pass the same file to the form on the second step? I mean how to insert request.FILES data in the same form again. Or maybe there is a better way? Thanks, Arshavski Alexander.

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• Rack layout tools

  - by Luke

  I'm wondering if there's any tools (preferably offline) that would allow me to layout all of the new equipment that will be going into several standard racks. Currently I'm using Excel to map out all of the slots columns for the data but I suspect that there is some better method of doing this. Suggestions? Edit: Dell has an online tool, but doesn't seem very good at actually saving the data that you're working on (and obviously it's geared towards Dell hardware).

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• Why javascript IF only works one time?

  - by Emily

  I have javascript code which copy the value of input file and past it in the text box in real time. <script> function copyit(){ var thephoto=document.getElementById('thephoto').value; var fileonchange=document.getElementById('fileonchange').value; if(!thephoto==fileonchange){ document.getElementById('fileonchange').value=thephoto; } } window.setInterval("copyit()", 500); </script> Choose File : <input type="file" id="thephoto"><br> Here Is the file name : <input type="text" id="fileonchange"> Sadly this only works one time and then stops pasting the value when changing the file again. ( i mean you should reload the page to works again) Is IF has a cache or something? you can try the code by yourself to see. Thank you all

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• Is there a way to specify minimum minibuffer/echo area size in emacs?

  - by Trevor Alexander

  I am running Emacs 24, and due to a separate issue, my input method displays input candidates in the minibuffer regardless of how I set its options. That would not be such a problem if the minibuffer did not resize from height 2 (when displaying candidates) to height 1 (when not), repeatedly, as I scroll through candidates--it's really jarring. I looked through the documentation online and searched the configuration pages, but I couldn't find a setting for this. Is it possible?

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• Why & When should I use SPARSE COLUMN? (SQL SERVER 2008)

  - by priyanka.sarkar

  After going thru some tutorials on SQL SERVER 2008's new feature SPARSE COLUMN, I have found that it doesn't take any space if the column value is 0 or null but when there is a value, it takes 4 times the space a regular(non sparse) column holds. If my understanding is correct, then why I will go for that at the time of database design? And if I use that, then at what situation so I be? Also out of curiosity, how come no space get's reserve when a column is defined as sparse column(I mean to say, what is the internal implementation for that) Thanks in advance

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• share text on facebook from iOS application using sharekit

  - by Rendel

  I want to share some text on facebook using sharekit. I found many solutions but no1 worked for me. I have imported sharekit and frameworks in my project. Now I want to share text: @"Hello everyone" directly (I mean not to choose from options: mail, twitter, facebook. When I press button share it should share text on facebook, of couse ask log in if it's necessary). And also I will be glad if you tell me which fields are necessary to fill in the SHKConfig.h file for facebook.

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• Building Asp.net Page code behind correctly

  - by Hagai

  Hi everyone, I need some guidelines about building the code behind of my pages correctly. I mean, I'm building in asp.net for a year now, and mostly using the Page_Load event. (and ofcourse "event handling" the events triggered by the user's actions). I know about the page life cycle and the order of events that happens when a page is requested etc.. . Is it normal that, generally, in a data-driven page, for example, I'm not using any of the "pre_render", "page_unload", "pre_init" etc.. event handlers? or am I missing something here? any guidelines would help me a lot, including links or whatever you think that would instruct me well. thanks.

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• Open Source Contribution for a newbie programmer.

  - by sasayins

  Hi, I am teaching programming to my nephews and I want them to improve their skills by contributing to open source projects. Now my question is, do you know any open source project that suit for a newbie programmer. What I mean is, the project does not have a large codebase, the project is very interesting and the project is written in C because I chose C language as their starting language but you can suggest other project made in other language. My goal here are to improve their logic by reading other source codes, familiarize to the available development tools like bug tracker, version control system, etc. and open their interest in open source community. Thanks. =)

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