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• How to remotely open gedit with SFTP URL in Gnome through SSH?

  - by Álvaro Justen

  My setup is weird and I can't change it now. I have two machines: local-machine: it's my desktop running Ubuntu with Gnome remote-machine: it's one virtual machine, also running Ubuntu but without X In both machines I have my private and public SSH keys. I need to run SSH from remote-machine to local-machine and run gedit (in local-machine, under the default $DISPLAY) but openning a file in remote-machine throught SFTP. Something like this: myuser@remote-machine:~$ ssh local-machine "DISPLAY=:0.0 gedit sftp://remote-machine/some/file" The command above doesn't work. gedit shows this message: Could not open the file sftp://remote-machine/some/file. gedit cannot handle sftp: locations. Note that: /some/file exists on remote-machine. I can SSH normally from remote-machine to local-machine using my SSH key without any problems! I can run the command DISPLAY=:0.0 gedit sftp://remote-machine/some/file in a terminal on local-machine and gedit opens the file on remote-machine without any problems - but the terminal in which I executed the command is running in DISPLAY :0 (really, it's gnome-terminal). I also tried -t option of SSH client (to force pseudo-tty allocation) but it didn't work. If I try to run DISPLAY=:0.0 gedit sftp://remote-machine/some/file in local-machine but under a tty (for example in tty1, by pressing <Ctrl>+<Alt>+<F1>) it doesn't not work - I get the same error when running from remote-machine. I found that if I pass the environment variable DBUS_SESSION_BUS_ADDRESS with a correct value, it works! So, if I do something like that: myuser@local-machine:~$ env | grep DBUS_SESSION_BUS_ADDRESS > env.txt myuser@local-machine:~$ scp env.txt remote-machine: and then: myuser@remote-machine:~$ ssh local-machine "DISPLAY=:0.0 $(cat env.txt) gedit sftp://remote-machine/some/file" it works! The problem is that I'm not on local-machine so I can't get the correct value for this env variable. Is there any other way to make this work?

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• Troubleshooting: Monitor never turns on, system fans running, DVD-ROM does not open.

  - by Wesley

  Hi all, Here are my specs beforehand: ECS P4VXASD2+ (V5.0) motherboard FSB 533MHz Intel Pentium 4 2.40A GHz Prescott Socket 478 2x 256MB PC2100 DDR RAM, 2x 256MB PC133 SDRAM CoolMax 350W PSU DVD-ROM - will edit with brand & model 128MB ATi Radeon 9800 Pro AGP No hard drive So, I just put those parts together today and I tried to power it up, with the monitor connected to the Radeon 9800 in the AGP slot (mobo does not have VGA port). After turning it on, the CPU fan, graphics fan and system fan go on. However, the monitor remains in standby mode, despite being plugged in. Also, after pushing the button on the DVD-ROM drive, it does not open. I've used the DVD-ROM drive before with absolutely no issues. The graphics card was slightly buggy when I put it on another machine, which was left outside in winter weather for 3 months. (Still that computer's integrated graphics worked fine.) CMOS battery was replaced and jumpers are all set correctly. Now, I'm wondering whether the motherboard, CPU, PSU or GPU is the problem. What can I do to test which part is the problem? Just to clarify, I don't have a hard drive, so I usually boot Ubuntu from the disc drive. Anyways, thanks in advance!

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• Outlook error-'Can't open e-mail folders.You must connect to Exchange w/ current profile before you can sync folders w/ your Outlook data file'

  - by Emilio

  Note that the error message I put in the title of this question is abbreviated. The actual error message is below. I have an Exchange account and using Outlook 2010 as the client. I run in Cached Exchange Mode and have an .OST file locally. Recently I uninstalled and reinstalled office. I set up a new mail profile when prompted by Outlook 2010 upon first execution of the program. In my initial attempt, I pointed the data file at my existing OST file. In my second attempt, I had Outlook create a fresh empty file. In both cases I'm getting the error 'Cannot open your default e-mail folders. You must connect to Microsoft Exchange with the current profile before you can synchronize your folders with your Outlook data file (.ost).', also shown in this screenshot -- http://drop.io/4rc9v9o/asset/outlook-error-png. I don't know how to connect with the current profile - that's what I thought I did when I created a new .OST file? I've had this problem for several days so my OST file is now out of date. Once I get things running I obviously want my active mailbox to update the OST, not the other way around.

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• Can not open ports in iptables on CentOS 5??

  - by abszero

  I am trying to open up ports in CentOS's firewall and am having a terrible go at it. I have followed the "HowTo" here: http://wiki.centos.org/HowTos/Network/IPTables as well as a few other places on the Net but I still can't get the bloody thing to work. Basically I wanted to get two things working: VNC and Apache over the internal network. The problem is that the firewall is blocking all attempts to connect to these services. Now if I issue service iptables stop and then try to access the server via VNC or hit the webserver everything works as expected. However the moment I turn iptables back on all of my access is blocked. Below is a truncated version of my iptables file as it appears in vi -A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 5801 -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 5901 -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 6001 -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 5900 -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT Really I would just be happy if I could get port 80 opened up for Apache since I can do most stuff via putty but if I could figure out VNC as well that would be cool. As far as VNC goes there is just a single/user desktop that I am trying to connect to via: [ipaddress]:1 Any help would be greatly appreciated!

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• Windows 7 mouse multi selection on windows explorer with CTRL and point to select / single click to open

  - by bortao

  This is something that have annoyed me since i changed to Windows 7. I don't do double click for a long time now since windows introduced 1 click selection (Folder Options Click items as follows Single click to open an item). The problem is, when i click Control and hover over the items, they select/deselect automatically every small amount of mouse movement i make. What i want is to select/deselect the items only when i enter/exit them. So to deselect an item im hovering, i have to move the mouse out of it, and then back in. I'm using Intellimouse Explorer official drivers. (edit) Here's another related annoyance: When you are hovering something and move the mouse inside other item (Holding Ctrl) The new item may or may not be selected. If you continue moving the mouse it gets selected/deselected as you move. (more edit) I have found that the parameter HKCU\Control Panel\Mouse\MouseHoverHeight / MouseHoverWidth have some influence here. If it's set to 2, the item select/deselect really quickly as you move the mouse. When set to larger numbers, its slower. But setting to 20 or 200 don't seem to be much different.

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• Made a .dmg for a project; user can't open it - "no mountable file systems"

  - by dragonridingsorceress

  Hello, We don't know a great deal about Macs. We had to make an installer, and were told to try a .dmg So we put together version 1, and it seemed to work. We had one application file, which had our icon, and one folder. The user was instructed to drag these into the Applications folder, of which there was the Mac version of a shortcut in the dmg. Then we were told we needed to update files, and assured that we could do so via drag-and-drop. So we did; we dragged them into the folder in the dmg. We tested it (on the computer we were using to edit the dmg) and it seemed to work. So we burnt it onto a disk (along with a windows installer that actually works!). I've just gotten an email from the recipient. She's got a Mac laptop. She inserted the disk, doubleclicked on it, doubleclicked on the .dmg, and got a Warning: no mountable file systems. Screenshot: http://www.flickr.com/photos/97292258@N00/5101670174/ I have the dmg (not on a disk) and am able to open it with no difficulty. How can we get it to work for our recipient?

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• ms excel 2010 in windows xp - when open workbook the data is formatted differently than when i saved it

  - by Justin

  I haven't been able to find an answer to this. I have multiple files that I use regularly in excel that now have cell formats of "date". Every single cell in the entire workbook (all sheets) is now formatted as "date". The problem is that I lost my formatting for percents, numbers years, etc and now everything is converted to date (xx/xx/xxxx). I am able to open previously saved versions of a file (prior to me having the problem) and the cells are formatted as I intend them to be (percents, numbers, general, as well as dates). Since this has happened on a couple different files recently, I am wondering how this is happening and how do I prevent it from happening in the future. I cannot cure the problem just by highlighting the entire sheet and converting back to general because I lose all my percents and number formatting. Example (Correct formatting): Month Year Working Days MTD POS Curr Rem May 2012 22 0 1,553,549 June 2012 22 0 1,516,903 June 2011 22 0 1,555,512 June 2010 22 0 1,584,704 Example (Incorrect formatting): Month Year Working Days MTD POS Curr Rem June Tuesday, July 04, 1905 Wednesday, January 04, 1900 Wednesday, January 18, 1900 213,320 July Tuesday, July 04, 1905 Wednesday, January 04, 1900 Monday, January 16, 1900 314,261 July Monday, July 03, 1905 Wednesday, January 04, 1900 Sunday, January 15, 1900 447,759 July Sunday, July 02, 1905 Wednesday, January 04, 1900 Monday, January 16, 1900 321,952 Sorry for the mess. Any suggestions?

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• Can anyone explain me the source code of python "import this"?

  - by byterussian

  If you open a Python interpreter, and type "import this", as you know, it prints: The Zen of Python, by Tim Peters Beautiful is better than ugly. Explicit is better than implicit. Simple is better than complex. Complex is better than complicated. Flat is better than nested. Sparse is better than dense. Readability counts. Special cases aren't special enough to break the rules. Although practicality beats purity. Errors should never pass silently. Unless explicitly silenced. In the face of ambiguity, refuse the temptation to guess. There should be one-- and preferably only one --obvious way to do it. Although that way may not be obvious at first unless you're Dutch. Now is better than never. Although never is often better than *right* now. If the implementation is hard to explain, it's a bad idea. If the implementation is easy to explain, it may be a good idea. Namespaces are one honking great idea -- let's do more of those! In the python source(Lib/this.py) this text is generated by a curios piece of code: s = """Gur Mra bs Clguba, ol Gvz Crgref Ornhgvshy vf orggre guna htyl. Rkcyvpvg vf orggre guna vzcyvpvg. Fvzcyr vf orggre guna pbzcyrk. Pbzcyrk vf orggre guna pbzcyvpngrq. Syng vf orggre guna arfgrq. Fcnefr vf orggre guna qrafr. Ernqnovyvgl pbhagf. Fcrpvny pnfrf nera'g fcrpvny rabhtu gb oernx gur ehyrf. Nygubhtu cenpgvpnyvgl orngf chevgl. Reebef fubhyq arire cnff fvyragyl. Hayrff rkcyvpvgyl fvyraprq. Va gur snpr bs nzovthvgl, ershfr gur grzcgngvba gb thrff. Gurer fubhyq or bar-- naq cersrenoyl bayl bar --boivbhf jnl gb qb vg. Nygubhtu gung jnl znl abg or boivbhf ng svefg hayrff lbh'er Qhgpu. Abj vf orggre guna arire. Nygubhtu arire vf bsgra orggre guna *evtug* abj. Vs gur vzcyrzragngvba vf uneq gb rkcynva, vg'f n onq vqrn. Vs gur vzcyrzragngvba vf rnfl gb rkcynva, vg znl or n tbbq vqrn. Anzrfcnprf ner bar ubaxvat terng vqrn -- yrg'f qb zber bs gubfr!""" d = {} for c in (65, 97): for i in range(26): d[chr(i+c)] = chr((i+13) % 26 + c) print "".join([d.get(c, c) for c in s])

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• How can I have a Makefile automatically rebuild source files that include a modified header file? (I

  - by Nicholas Flynt

  I have the following makefile that I use to build a program (a kernel, actually) that I'm working on. Its from scratch and I'm learning about the process, so its not perfect, but I think its powerful enough at this point for my level of experience writing makefiles. AS = nasm CC = gcc LD = ld TARGET = core BUILD = build SOURCES = source INCLUDE = include ASM = assembly VPATH = $(SOURCES) CFLAGS = -Wall -O -fstrength-reduce -fomit-frame-pointer -finline-functions \ -nostdinc -fno-builtin -I $(INCLUDE) ASFLAGS = -f elf #CFILES = core.c consoleio.c system.c CFILES = $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.c))) SFILES = assembly/start.asm SOBJS = $(SFILES:.asm=.o) COBJS = $(CFILES:.c=.o) OBJS = $(SOBJS) $(COBJS) build : $(TARGET).img $(TARGET).img : $(TARGET).elf c:/python26/python.exe concat.py stage1 stage2 pad.bin core.elf floppy.img $(TARGET).elf : $(OBJS) $(LD) -T link.ld -o $@ $^ $(SOBJS) : $(SFILES) $(AS) $(ASFLAGS) $< -o $@ %.o: %.c @echo Compiling $<... $(CC) $(CFLAGS) -c -o $@ $< #Clean Script - Should clear out all .o files everywhere and all that. clean: -del *.img -del *.o -del assembly\*.o -del core.elf My main issue with this makefile is that when I modify a header file that one or more C files include, the C files aren't rebuilt. I can fix this quite easily by having all of my header files be dependencies for all of my C files, but that would effectively cause a complete rebuild of the project any time I changed/added a header file, which would not be very graceful. What I want is for only the C files that include the header file I change to be rebuilt, and for the entire project to be linked again. I can do the linking by causing all header files to be dependencies of the target, but I cannot figure out how to make the C files be invalidated when their included header files are newer. I've heard that GCC has some commands to make this possible (so the makefile can somehow figure out which files need to be rebuilt) but I can't for the life of me find an actual implementation example to look at. Can someone post a solution that will enable this behavior in a makefile? EDIT: I should clarify, I'm familiar with the concept of putting the individual targets in and having each target.o require the header files. That requires me to be editing the makefile every time I include a header file somewhere, which is a bit of a pain. I'm looking for a solution that can derive the header file dependencies on its own, which I'm fairly certain I've seen in other projects.

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• How to change source order of <div> in less steps/automatically?

  - by metal-gear-solid

  How can i do this task automate. i need to change source order of div, which has same id in above 100 pages. i created example This is default condition <div class="identification"> <div class="number">Number 1</div> </div> <div class="identification"> <div class="number">Number 2</div> </div> <div class="identification"> <div class="number">Number 3</div> </div> <div class="identification"> <div class="number">Number 4</div> </div> <div class="identification"> <div class="number">Number 5</div> </div> <div class="identification"> <div class="number">Number 6</div> </div> I need lik this <div class="identification"> <div class="number">Number 1</div> </div> <div class="identification"> <div class="number">Number 3</div> </div> <div class="identification"> <div class="number">Number 2</div> </div> <div class="identification"> <div class="number">Number 6</div> </div> <div class="identification"> <div class="number">Number 4</div> </div> <div class="identification"> <div class="number">Number 5</div> </div> Is the manual editing only option? I use dreamweaver.

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• Too nervous to install

  - by The Prop

  Yesterday I (a professional rugby prop of somewhat limited intellect) landed in http://htmlagilitypack.codeplex.com/ and found myself stranded in a town with no signposts. The locals don't need signposts - they know their way around - so who gives a hoot about visitors? Well I'm a visitor and I'm lost. Here's my plea to the good burgesses of Codeplex-sans-signs: HELP!! Let me back-track and explain what landed me at the bottom of this tangled ruck. There's a "Download" button positioned near the top-right of the Codeplex web page, right? Like the Sword of Damocles, a down-arrow to the left of the button indicates, presumably, what a download would include: CURRENT 1.4.0 Stable DATE Fri May 7 2010 at 7:00 AM STATUS Stable With a simple-minded confidence that has since deserted me (the confidence - not the simple-mindedness), I clicked "Download". This introduced 3 new files to my computer: HtmlAgilityPack.dll, HtmlAgilityPack.pdb, and HtmlAgilityPack.XML This is when the first stab of doubt penetrated that globe between my cauliflower ears that I call a head. Where's the dot cs? Somewhere in Codeplex, I'd read advice to another lost soul to "download and build the HTMLAgilityPack solution". As I've done so many times as an All Black prop, I glared at the opposition front row - ah, I mean the 3 new files. Shouldn't one of them have a ".cs" on the back of his jersey - er, on the end of its name? Or is this just how they play the game in Codeplex-sans-signs? Undaunted (props have more courage than sense) I packed into my first C# scrum. The half-back feeds the ball in, and the front rows collapse - er, the debugging stops at this line of my code: "HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();" Then the Referee blows his whistle and announces one of those verdicts that's utterly indecipherable to your average loose-head prop: Locating source for 'C:\Source\htmlagilitypack\Trunk\HtmlAgilityPack\HtmlDocument.cs'. Checksum: MD5 {62 bc f3 7e 9a 92 a6 32 7 d6 5b f8 76 59 7b 5b} The file 'C:\Source\htmlagilitypack\Trunk\HtmlAgilityPack\HtmlDocument.cs' does not exist. Looking in script documents for 'C:\Source\htmlagilitypack\Trunk\HtmlAgilityPack\HtmlDocument.cs'... Looking in the projects for 'C:\Source\htmlagilitypack\Trunk\HtmlAgilityPack\HtmlDocument.cs'. The file was not found in a project. Looking in directory 'C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\vc7\atlmfc'... Looking in directory 'C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\vc7\crt'... The debugger will ask the user to find the file: C:\Source\htmlagilitypack\Trunk\HtmlAgilityPack\HtmlDocument.cs. The user pressed Cancel [a brain-stemmer from the prop] in the Find Source dialog. The debug source files settings for the active solution have been modified so that the debugger will not ask the user to find the file: C:\Source\htmlagilitypack\Trunk\HtmlAgilityPack\HtmlDocument.cs. The debugger could not locate the source file 'C:\Source\htmlagilitypack\Trunk\HtmlAgilityPack\HtmlDocument.cs'. Even if it had been the first 50 stanzas of "Eskimo Nell", I couldn't have been more shocked. I'm so shocked, my jaws clamp shut around the opposition hooker's ear. He thumbs me in the iris. With a cornea-torn eye I peer at the Codeplex site. My brain stem sparks and I punch the "View all downloads" link. It sparks four more times on each download link, and.. lo! FOUR files this time: HAPExplorer.zip, HtmlAgilityPack.1.4.0.Source.zip, HtmlAgilityPack.1.4.0.zip, HtmlAgilityPack.Documentation.chm But... is this not the same place arrived at recently by my flat-mate Chaz, journalist extraordinaire? (Chaz, if you're reading this, I'm not plugging for nothing - just write kindly about me in your next report, okay?) Didn't these same four files flummox Chaz The Great? He told me about it. Chaz left a message with Codeplex and then solved the problem by just walking away. Typical journalist, huh. But I'm not like that. I don't walk away. I'm made of the sort of stubborn stuff that becomes an All Black prop. Hence this impassioned plea: GOOD TOWNSFOLK OF CODEPLEX-SANS-SIGNS, WHAT SHOULD I DO NEXT? Can somebody point me to Main Street? How does a simpleton install 'C:\Source\htmlagilitypack\Trunk\HtmlAgilityPack\HtmlDocument.cs'? I'm willing to prostrate myself and grovel to the first kind face that passes in front of my rapidly clouding sight. So help me, I'd even tug my forelock if I had one! Should I hold forth my rod over the wilderness, and create a folder called 'C:\Source\htmlagilitypack\Trunk\HtmlAgilityPack\' or some such? If so, what files should I move into it? ANYTHING else a dum-ass should know about? - and I mean ANYTHING - you just don't know how witless a punch-drunk prop can be.. %( Whenever I've installed other programs they've given me an ".exe" or ".msi" that I can click on and it's all done for me like magic. HEY... there's nothing of that nature here, is there? Am I missing something? Something for dummies to click? (From the waiting rooms of Dr I. Sight Phixes) (signed) The Prop

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• How can I extend DynamicQuery.cs to implement a .Single method?

  - by Yoenhofen

  I need to write some dynamic queries for a project I'm working on. I'm finding out that a significant amount of time is being spent by my program on the Count and First methods, so I started to change to .Single, only to find out that there is no such method. The code below was my first attempt at creating one (mostly copied from the Where method), but it's not working. Help? public static object Single(this IQueryable source, string predicate, params object[] values) { if (source == null) throw new ArgumentNullException("source"); if (predicate == null) throw new ArgumentNullException("predicate"); LambdaExpression lambda = DynamicExpression.ParseLambda(source.ElementType, typeof(bool), predicate, values); return source.Provider.CreateQuery( Expression.Call( typeof(Queryable), "Single", new Type[] { source.ElementType }, source.Expression, Expression.Quote(lambda))); }

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• Problem using serena dimensions plugin in ibm rad7.5

  - by buffer_overflow_2007

  I have a problem using serena dimensions plugin in ibm rad7.5. on my notebook lenovo thinkpad sl510 with windows xp sp3. When i connect my repository i have this exception: java.lang.NullPointerException at com.serena.eclipse.dimensions.core.DmSettings.setConnectionExtraData(Unknown Source) at com.serena.eclipse.dimensions.core.DMPlugin.updateConnection(Unknown Source) at com.serena.eclipse.dimensions.core.DimensionsConnectionDetailsEx.openConnection(Unknown Source) at com.serena.eclipse.dimensions.core.Session.open(Unknown Source) at com.serena.eclipse.dimensions.core.DimensionsConnectionDetailsEx.openSession(Unknown Source) at com.serena.eclipse.dimensions.core.DimensionsConnectionDetailsEx.openSession(Unknown Source) at com.serena.eclipse.dimensions.core.ConnectJob.run(Unknown Source) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55). Please help me,work only with client dimensions is very difficult.

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• Issue while loading a dll library file... java.lang.UnsatisfiedLinkError: Can't load library

  - by Bhaskara Krishna Mohan Potam

  Hi, While loading a dll file, I am getting the following exception: Exception in thread "main" java.lang.UnsatisfiedLinkError: Can't load library: D:\Transliteration\rlpnc-3.1.0-sdk-ia32-w32-msvc80\rlp\bin\ia32-w32-msvc80\btutiljni.dll at java.lang.ClassLoader.loadLibrary(Unknown Source) at java.lang.Runtime.load0(Unknown Source) at java.lang.System.load(Unknown Source) at com.basistech.util.internal.Native.bootstrapUtilitiesJNI(Unknown Source) at com.basistech.util.internal.Native.loadLibrary(Unknown Source) at com.basistech.rnt.jni.(Unknown Source) at com.basistech.rnt.RNTEnvironment.(Unknown Source) at SampleTranslator.(TranslateNameSample.java:88) at TranslateNameSample.main(TranslateNameSample.java:62) not sure about the root cause of the issue. Can anybody help me out in resolving this issue. Thanks, Bhaskar

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• What is the relaxation condition in graph theory

  - by windopal

  Hi, I'm trying to understand the main concepts of graph theory and the algorithms within it. Most algorithms seem to contain a "Relaxation Condition" I'm unsure about what this is. Could some one explain it to me please. An example of this is dijkstras algorithm, here is the pseudo-code. 1 function Dijkstra(Graph, source): 2 for each vertex v in Graph: // Initializations 3 dist[v] := infinity // Unknown distance function from source to v 4 previous[v] := undefined // Previous node in optimal path from source 5 dist[source] := 0 // Distance from source to source 6 Q := the set of all nodes in Graph // All nodes in the graph are unoptimized - thus are in Q 7 while Q is not empty: // The main loop 8 u := vertex in Q with smallest dist[] 9 if dist[u] = infinity: 10 break // all remaining vertices are inaccessible from source 11 remove u from Q 12 for each neighbor v of u: // where v has not yet been removed from Q. 13 alt := dist[u] + dist_between(u, v) 14 if alt < dist[v]: // Relax (u,v,a) 15 dist[v] := alt 16 previous[v] := u 17 return dist[] Thanks

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• Can't change pivot table's Access data source - bug in Excel 2000 SP3?

  - by Ron West

  I have a set of Excel 2000 SP3 worksheets that have Pivot Tables that get data from an Access 2000 SP3 database created by a contractor who left our company. Unfortunately, he did all his work on his private area on the company (Novell) network and now that he has left us, the drive spec has been deleted and is invalid. We were able to get the database files restored to our network area by our IT Service Desk people, but we now have to re-link everything to point to our group area instead of the now-nonexistent private area. If I follow the advice given elsewhere on this site (open wizard, click 'Back' to get to 'Step 2 of 3', click 'Get Data...' I get a message that the old filespec is an invalid path and I need to check that the path name is invalid and that I am connected to the server on which the file resides. I then click on OK and get a Login dialog with a 'Database...' button on the right. I click this and get a 'Select Database' dialog which allows me to choose the appropriate database in its correct new location. I then click OK, which takes me back to the 'Login' screen. I can confirm that it has accepted my new location by clicking on 'Database...' as before and the NEW location is still shown. So far so good - but if I then click on OK I get two unhelpful messages - first I get one saying that Excel 'Could not use '|'; file already in use.' - although no other files are in use. Clicking on OK takes me back to the 'Login' dialog. Clicking OK again gives me the same message as before telling me that the OLD filespec is invalid (as if I hadn't changed anything) - but clicking on the 'Database...' button shows that the correct (NEW) database location is still selected. Can anyone tell me a way of using VBA to change the link information without having to spend hours fighting the PivotTable Wizard - preferably similar to this way you update an Access Tabledef:- db.TableDefs(strLinkName).Connect = strNewLink db.TableDefs(strLinkName).RefreshLink Thanks!

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• To call SelectMany dynamically in the way of System.Linq.Dynamic

  - by user341127

  In System.Linq.Dynamic, there are a few methods to form Select, Where and other Linq statements dynamically. But there is no for SelectMany. The method for Select is as the following: public static IQueryable Select(this IQueryable source, string selector, params object[] values) { if (source == null) throw new ArgumentNullException("source"); if (selector == null) throw new ArgumentNullException("selector"); LambdaExpression lambda = DynamicExpression.ParseLambda(source.ElementType, null, selector, values); IQueryable result = source.Provider.CreateQuery( Expression.Call( typeof(Queryable), "Select", new Type[] { source.ElementType, lambda.Body.Type }, source.Expression, Expression.Quote(lambda))); return result; } I tried to modify the above code, after hours working, I couldn't find a way out. Any suggestions are welcome. Ying

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• How to rotate an SSE/AVX vector

  - by user1584773

  I need to perform a rotate operation with as little clock cycle as possible. In the first case let's assume __m128i as source and dest type source: || A0 || A1 || A2 || A3 || dest : || A1 || A2 || A3 || A0 || dest = (__m128i)_mm_shuffle_epi32((__m128i)source, _MM_SHUFFLE(0,3,2,1)); Now I want to do the same whit AVX intrinsics So let's assume this time __m256i as source and dest type source: || A0 || A1 || A2 || A3 || A4 || A5 || A6 || A7 || dest : || A1 || A2 || A3 || A4 || A5 || A6 || A7 || A0 || The Avx intrinsics is missing most of the corresponding SSE integer operations. Maybe there is some way go get the desider output working with the floating point version. I've tryed with: dest = (__m256i)_mm256_shuffle_ps((__m256)source, (__m256)source, _MM_SHUFFLE(0,3,2,1)); but what I get is: || A0 || A2 || A3 || A4 || A5 || A6 || A7 || A1 || Any Idea on how to solve this in an efficient way? (without mixing SSE and AVX operation and without "manually" inverting A0 and A1 Thanks in advance!

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• Table-level diff and sync procedure for T-SQL

  - by Ville Koskinen

  I'm interested in T-SQL source code for synchronizing a table (or perhaps a subset of it) with data from another similar table. The two tables could contain any variables, for example I could have base table source table ========== ============ id val id val ---------- ------------ 0 1 0 3 1 2 1 2 2 3 3 4 or base table source table =================== ================== key val1 val2 key val1 val2 ------------------- ------------------ A 1 0 A 1 1 B 2 1 C 2 2 C 3 3 E 4 0 or any two tables containing similar columns with similar names. I'd like to be able to check that the two tables have matching columns: the source table has exactly the same columns as the base table and the datatypes match make a diff from the base table to the source table do the necessary updates, deletes and inserts to change the data in the base table to correspond the source table optionally limit the diff to a subset of the base table, preferrably with a stored procedure. Has anyone written a stored proc for this or could you point to a source?

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• Rails: Skinny Controller vs. Fat Model, or should I make my Controller Anorexic?

  - by Nick Gorbikoff

  I know similar questions have been answered before - such as: Where should logic go, where to do certain tasks, etc. But I have a more specific question - How far should I take this axiom: "keep your controller skinny, make your model fat!" Here is an example: For instance let's say I have multiple source of verification data. A good example would be a VIN number - I can verify it against, manufacturers data source, DMV's data source, also my local databases - to see what I have on record. So I have a model called Vin and vins_controller. Inside the model I have 5 methods: check_against_local_db, check_against_dmv, check_against_car_maker_1, check_against_car_maker_2, etc. In my controller keeping with the REST, in action show - I have a simple case statement which looks at the params[:source], and based on source specified - will call specific check method. Now here is the question: Should I leave the logic that governs which data source to call in controller or should I move it to model and then in controller just do something like check_vin(source, vin)? Should I make my controller anorexic?

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• Use Automapper to flatten sub-class of property

  - by Neil

  Given the classes: public class Person { public string Name { get; set; } } public class Student : Person { public int StudentId { get; set; } } public class Source { public Person Person { get; set; } } public class Dest { public string PersonName { get; set; } public int? PersonStudentId { get; set; } } I want to use Automapper to map Source - Dest. This test obviously fails: Mapper.CreateMap<Source, Dest>(); var source = new Source() { Person = new Student(){ Name = "J", StudentId = 5 }}; var dest = Mapper.Map<Source, Dest>(source); Assert.AreEqual(5, dest.PersonStudentId); What would be the best approach to mapping this given that "Person" is actually a heavily used data-type throughout our domain model.

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• What's the most efficient query?

  - by Aaron Carlino

  I have a table named Projects that has the following relationships: has many Contributions has many Payments In my result set, I need the following aggregate values: Number of unique contributors (DonorID on the Contribution table) Total contributed (SUM of Amount on Contribution table) Total paid (SUM of PaymentAmount on Payment table) Because there are so many aggregate functions and multiple joins, it gets messy do use standard aggregate functions the the GROUP BY clause. I also need the ability to sort and filter these fields. So I've come up with two options: Using subqueries: SELECT Project.ID AS PROJECT_ID, (SELECT SUM(PaymentAmount) FROM Payment WHERE ProjectID = PROJECT_ID) AS TotalPaidBack, (SELECT COUNT(DISTINCT DonorID) FROM Contribution WHERE RecipientID = PROJECT_ID) AS ContributorCount, (SELECT SUM(Amount) FROM Contribution WHERE RecipientID = PROJECT_ID) AS TotalReceived FROM Project; Using a temporary table: DROP TABLE IF EXISTS Project_Temp; CREATE TEMPORARY TABLE Project_Temp (project_id INT NOT NULL, total_payments INT, total_donors INT, total_received INT, PRIMARY KEY(project_id)) ENGINE=MEMORY; INSERT INTO Project_Temp (project_id,total_payments) SELECT `Project`.ID, IFNULL(SUM(PaymentAmount),0) FROM `Project` LEFT JOIN `Payment` ON ProjectID = `Project`.ID GROUP BY 1; INSERT INTO Project_Temp (project_id,total_donors,total_received) SELECT `Project`.ID, IFNULL(COUNT(DISTINCT DonorID),0), IFNULL(SUM(Amount),0) FROM `Project` LEFT JOIN `Contribution` ON RecipientID = `Project`.ID GROUP BY 1 ON DUPLICATE KEY UPDATE total_donors = VALUES(total_donors), total_received = VALUES(total_received); SELECT * FROM Project_Temp; Tests for both are pretty comparable, in the 0.7 - 0.8 seconds range with 1,000 rows. But I'm really concerned about scalability, and I don't want to have to re-engineer everything as my tables grow. What's the best approach?

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• Windows Build System: How to build a project (from its source code) which doesn't have *.sln or Visu

  - by claws

  I'm facing this problem. So, I need to build the support libraries (zlib, libtiff, libpng, libxml2, libiconv) with "Multithreaded DLL" (/MD) & "Multithreaded DLL Debug" (/MDd) run-time options. But the problem is there is no direct way . I mean there is no *.sln / *.vcproj file which I can open in Visual C++ and build it. I'm aware with the GNU build system: $./configure --with-all-sorts-of-required-switches $./make $./make install During my search I've encountered with something called CMake which generates *.vcproj & *.sln file but for that CMakeLists.txt is required. Not all projects provide CMakeLists.txt. I've never compiled anything from Visual C++ Command Line. Generally most projects provide makefile. Now how do I generate *.vcproj / *.sln from this? Can I compile with mingw-make of MinGW? If I can, how do I set different options ("Multi-Threaded"(/MT), "Multi-Threaded Debug"(/MTd), "Multi-Threaded DLL"(/MD), "Multi-Threaded DLL Debug"(/MDd)) for run-time libraries? I don't know what other ways are available. Please throw some light on this.

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• Django gives "I/O operation on closed file" error when reading from a saved ImageField

  - by Rob Osborne

  I have a model with two image fields, a source image and a thumbnail. When I update the new source image, save it and then try to read the source image to crop/scale it to a thumbnail I get an "I/O operation on closed file" error from PIL. If I update the source image, don't save the source image, and then try to read the source image to crop/scale, I get an "attempting to read from closed file" error from PIL. In both cases the source image is actually saved and available in later request/response loops. If I don't crop/scale in a single request/response loop but instead upload on one page and then crop/scale in another page this all works fine. This seems to be a cached buffer being reused some how, either by PIL or by the Django file storage. Any ideas on how to make an ImageField readable after saving?

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• Archiving Database Tables using Java

  - by HonorGod

  My application demands archiving database tables between sybase and db2 and vice-a-versa and within(db2 to db2 and sybase to sybase) using java. I am trying to understand the best strategies around in terms performance, implementation, ease of use and scalability. Here is my current process - source and destination tables with the acceptable parameters (from java) are defined within xml. the application reads the source and destination configurations and execute them sequentially. destination is sometime optional when source is just deleting data from a specific table or when the source is just calling a stored procedure. dataset between source and destination is extremely large (in millions) From top of my head, it looks like I can define dependencies between multiple source and destination combination and have them execute in parallel in multiple treads. But will this improve any performance(i hope it will)? Are there any open-source frameworks for data archiving using java? Any other thoughts on the implements side will be really helpful. Thanks

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