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• Why is scp not overwriting my destination file?

  - by Noli

  I'm trying to back up a file via the command scp /tmp/backup.tar.gz hostname:/home/user/backup.tar.gz When I run it, the scp progress bar shows up and it looks like its transferring the file, however when I log into the destination server to check the file, the timestamp and filesize haven't changed from the older version, so it looks like scp didn't overwrite the old file at all. It only sees to work when I manually delete the file from the destination server. I'm running ubuntu, and this is happening on two servers: one cygwin ssh, and one fedora core 3. Anyone have any idea why this is happening? I thought scp would ONLY overwrite existing files.. Thanks

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• Unlock a file with unlocker from a WinForms App?

  - by netadictos

  I am trying to unlock a file from a C# program, using unlocker. In my UI, I put a button to unlock the file the app couldn't delete. When the user pushes the button, I want unlocker (the famous app) to be opened. I have read about in the Unlocker web, and there is some explanations about the commandline to use but nothing works. I write the following code but nothing happens: "c:\Program Files\unlocker\unlocker.exe" -L "PATHFORTHEFILE.doc" Nothing happens. I have tried without parameters and with -LU. Any idea? Something more efficient than unlocker to integrate it with software?

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• Should I commit or rollback a transaction that creates a temp table, reads, then deletes it?

  - by Triynko

  To select information related to a list of hundreds of IDs... rather than make a huge select statement, I create temp table, insert the ids into it, join it with a table to select the rows matching the IDs, then delete the temp table. So this is essentially a read operation, with no permanent changes made to any persistent database tables. I do this in a transaction, to ensure the temp table is deleted when I'm finished. My question is... what happens when I commit such a transaction vs. let it roll it back? Performance-wise... does the DB engine have to do more work to roll back the transaction vs committing it? Is there even a difference since the only modifications are done to a temp table? Related question here, but doesn't answer my specific case involving temp tables: http://stackoverflow.com/questions/309834/should-i-commit-or-rollback-a-read-transaction

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• Understanding the Unix file system and ruby installs without Sudo

  - by JZ

  I'm trying to comprehend the Unix file system on my OSX. I'm following wikipedia Filesystem Hierarchy Standard. I understand when I install ruby gems I must use the command sudo gem install but if I omit sudo, problems may occur. Where are gems installed within the file system when I omit sudo? How can I delete these gems? A Fun side question: When I enter cd ~/.gem my terminal is directed to .gem user$, When I enter cd ~/ and list folders using the ls command I can't find a .gem folder. Where is the .gem folder? How does this fit into the Filesystem?

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• .NET Setup Package Installer

  - by Duncan

  Hi, I have a .NET 3.5 Setup Package Project which installs my application successfully. The setup package deploys a number (around 70) custom files for use from within the application. From time to time I have the requirement of deleting some of these files, however upon restarting the executable, it automatically runs a portion of the Setup MSI again, and re-installs these files. The only way I can achieve my desired result at the moment is to delete the files after starting the executable. I have looked through the attributes on the files in the setup package such as Vital and PackageAs, however cannot seem to identify the required setting to achieve this. Does anybody have any idea what is needed to acheive this ? Much thanks

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• Textmate bundle to remove a directory and build with Jekyll

  - by m1755

  I am looking for a simple Textmate bundle that will do the following two tasks in order: Delete the entire contents (including folders) of a directory (eg. ~/Sites/my_site). Run the jekyll command in the directory of the Textmate project. I am going to associate this with a "save current file" and use it to auto build my Jekyll site into the specified directory each time I save a file inside the project. Notes If #2 isn't possible, then cd into a specified directory and run the jekyll command. Would prefer bash or ruby.

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• How does SQL Server treat statements inside stored procedures with respect to transactions?

  - by Sleepless

  Hi All! Say I have a stored procedure consisting of several seperate SELECT, INSERT, UPDATE and DELETE statements. There is no explicit BEGIN TRANS / COMMIT TRANS / ROLLBACK TRANS logic. How will SQL Server handle this stored procedure transaction-wise? Will there be an implicit connection for each statement? Or will there be one transaction for the stored procedure? Also, how could I have found this out on my own using T-SQL and / or SQL Server Management Studio? Thanks!

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• Disable Ctrl-Alt-Del and shutdown for kiosk

  - by acidzombie24

  I finished an app for a client. After talking for a bit he would like me to do an additional app or recommend one for their kiosk. The client would like a way to prevent the computer from shutting down. They like to disable Ctrl+Alt+Delete (also so processes cant be killed), Alt+F4 to close their browser and no windows button to make the start menu pop up for the user to click or use keyboard to shutdown. Obviously there should be a way to unlock it I told them i'll look into it but they really don't need it. They are using Windows 7. Is there a WinAPI call I can use or an already existing app or a lib to do this?

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• J2ME private folder(only accessible to my midlet)

  - by Shankar

  I have two midlets, one will download some files form server everyday and the other uses these files. If i download the files to a normal folder the mobile user may delete the folder or files manually. So i need a private folder which is hidden and only accessible for my midlets. I heard about private folders which symbian platform provides for each application which are not accessible to users. I need such a folder for my j2me app. How to create such folder?? Shankar

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• Would this hack for per-object permissions in django work?

  - by Edward

  According to the documentation, a class can have the meta option permissions, described as such: Options.permissions Extra permissions to enter into the permissions table when creating this object. Add, delete and change permissions are automatically created for each object that has admin set. This example specifies an extra permission, can_deliver_pizzas: permissions = (("can_deliver_pizzas", "Can deliver pizzas"),) This is a list or tuple of 2-tuples in the format (permission_code, human_readable_permission_name). Would it be possible to define permissions at run time by: permissions = (("can_access_%s" % self.pk, / "Has access to object %s of type %s" % (self.pk,self.__name__)),) ?

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• How to use correctly the Query Window in SQL Server 2008

  - by Richard77

  Hello, What should I do to avoid that commands be executed each time I hit 'Execute !. icon' I mean this USE master; GO CREATE DATABASE Sales GO USE Sales; GO CREATE TABLE Customers( CustomerID int NOT NULL, LName varchar (50) NOT NULL, FName varchar (50) NULL, Status varchar (10), ModifiedBy varchar (30) NULL ) GO When I click Execute!, Sql Server tries to redo the same thing. What I do for now is to delete the Query Window completely then write what I need before clicking the Execute icon. But, I doubt that I should be doing that. What can I do to keep writing the commands without having each time to clear the Query Window? Thanks for helping

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• MySQL - ERROR 1045 - Access denied

  - by Abs

  In some way I have managed to get this error when I try to access into MySQL via the command line: [root@localhost ~]# mysql -u root -p Enter password: ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES) I have tried resetting the password without any luck using this HowTo. I have uninstalled mysql completley and reinstalled but I still get asked for a password. I have no idea why this is the case! Can someone please help me get a default install of MySQL. Environment Fedora Core 10, Full Root Access, Apache and PHP installed Thank you for any help!! EDIT To all those that would like to save themselves a few hours of "blood coughing" - when you uninstall MySQl completely delete everything that is left behind. If you don't do this, it will never be a FRESH install.

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• Removing a character from a string

  - by Prasanth Madhavan

  i have a string. I want to delete the last character of the string if it is a space. i tried the following code, str.erase(remove_if(str.begin(), str.end(), isspace), str.end()); but my g++ compiler gives me an error saying: error: no matching function for call to ‘remove_if(__gnu_cxx::__normal_iterator<char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, __gnu_cxx::__normal_iterator<char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, <unresolved overloaded function type>)’ please help.

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• Run shell script using fabric and piping script text to shell's stdin

  - by Peter Lyons

  Is there a way to execute a multi-line shell script by piping it to the remote shell's standard input in fabric? Or must I always write it to the remote filesystem, then run it, then delete it? I like sending to stdin as it avoids the temporary file. If there's no fabric API (and it seems like there is not based on my research), presumably I can just use the ssh module directly. Basically I wish fabric.api.run was not limited to a 1-line command that gets passed to the shell as a command line argument, but instead would take a full multi-line script and write it to the remote shell's standard input.

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• Is removing unused functionality a bad thing?

  - by Andrew Grimm

  Is it possible for YAGNI to apply in the past tense? You created some functionality, it was used a little bit a while ago, but you aren't using it any more, and you don't want to maintain it, so you'd rather delete it. Is getting rid of unused or rarely-used functionality neccessarily a bad thing? Background: I use source control, so if I need the functionality again, I can get it. I'm the only user of my software (I'm a bioinformatician analyzing a data set). One scenario where I came across this was that I was using inheritance, with a parent class, and two child classes. One was handling files generated by 454 sequencing (next-generation sequencing), and the other was handling files generated by Sanger sequencing (previous-generation sequencing). I was actively maintaining the latter, but not the former. Maybe my mistake was using inheritance rather than composition, but that's a slightly different story.

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• Can I fire a Text Changed Event for an asp.net Text Box before it loses focus?

  - by Xaisoft

  I have an asp.net TextBox in which I want to check if the text entered into the TextBox is > 0. It works once I tab out or click out of the TextBox, but if I keep focus on the TextBox, it won't fire the Text Changed Event, so I have the following scenario, I want to enable something if and only if the TextBox.Text.Length = 0. Now, if I put my caret in the TextBox and delete all the characters and then leave the caret in the TextBox so it still has focus and take my mouse and click a button, it will not do what it was supposed to do because it never fired the Text Changed Event. How would something like this be handled?

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• Copy constructor demo (crashing... case 2)

  - by AKN

  Please have a glance at this program: class CopyCon { public: char *name; CopyCon() { name = new char[20]; name = "Hai";//_tcscpy(name,"Hai"); } CopyCon(const CopyCon &objCopyCon) { name = new char[_tcslen(objCopyCon.name)+1]; _tcscpy(name,objCopyCon.name); } ~CopyCon() { if( name != NULL ) { delete[] name; name = NULL; } } }; int main() { CopyCon obj1; CopyCon obj2(obj1); cout<<obj1.name<<endl; cout<<obj2.name<<endl; } This program crashes on execution. Error: "Expression: _BLOCK_TYPE_IS_VALID(pHead-nBlockUse)" If I assign "Hai" to name using aasignment operator, its crashing. Where as when I use string func _tcscpy to assign "Hai" to name, its working perfectly. Can some one explain why so?

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• Other users on my Server?

  - by Jennifer Weinberg

  I'm buying a Server from a person (that I don't know really well) and I want to make sure that the previous owner hasn't got any access anymore. It's an Ubuntu Virtual Server and I already received the admin access (via shell). How can I find out if there are still other accounts left, who are still able to access my server (e.g. with a still existing shell account, ftp or another type of user account)? And how can I delete them if these accounts exist? Best regards, Jennifer

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• VBA: How to refer to the right worksheet

  - by stanigator

  Sub Macro1() ' ' Macro1 Macro ' ' Worksheets("Drop-down").Select n = Cells(1, 1).End(xlDown).Row For i = 1 To n ActiveSheet.Cells(i, 2).Select If Worksheets("Misc").Cells(2, i).Value <> "" Then If Worksheets("Misc").Cells(3, i).Value <> "" Then Set validationRange = Range(Worksheets("Misc").Cells(2, i), Worksheets("Misc").Cells(2, i).End(xlDown)) Else Set validationRange = Worksheets("Misc").Cells(2, i) End If With Selection.Validation .Delete .Add Type:=xlValidateList, AlertStyle:=xlValidAlertStop, Operator:= _ xlBetween, Formula1:=validationRange.Address .IgnoreBlank = True .InCellDropdown = True .InputTitle = "" .ErrorTitle = "" .InputMessage = "" .ErrorMessage = "" .ShowInput = True .ShowError = True End With End If Next i End Sub The lines after ActiveSheet.Cells(i,2).select within the for loop is not referring to the correct worksheet I want when I rechecked the settings for the validation drop-down menu. What is the easiest way of correcting this setback? Thanks in advance.

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• Using installshield to replace a same-versioned DLL in the GAC

  - by Kevin

  We recently put out an update of one of our apps with a "test" DLL from a third party. The third party does not update their assembly versions on the dll's, only the file versions, so multiple apps can reference different "versions" of it. However, the GAC still allows us to keep the newest version, because it also checks the file version which is always updated. What happened is we were not ready to release this DLL, but it got out there on some customer machines. I would like to put our current live version back out there, but it has an older file version (and the same assembly version) as the test DLL. We have multiple apps referencing this DLL, so I can't simply delete it and drop in the new one. Is there a way to replace the DLL in the GAC? I'm using installshield 2009. Perhaps some sort of custom action upon install?

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• iPhone SDK: How to detect a row-hit while in the editing mode?

  - by Carol

  I've looked everywhere and I can't find it. I have a UITableView that contain rows of "checkmark" cells. The user clicks on a row to check/uncheck it. (It works!!!!) But I also want to allow the user to EDIT the data on that row. ... so I have an "EDIT" button at the top. The user hits it and is allowed to DELETE any rows. (That works too!!!!) But how do I also detect a "tap" on that row. Where is there some kind of a didSelectRowAtIndexPathWhileInEditMode ???? (Is that really the best way to do this: Allow "selections", and "deletions", and "editing" of each row?)

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• Python: Remove items from a list while iterating in Python

  - by xApple

  My problem is simple: I have a long list of elements that I want to iterate through and check every element against a condition. Depending on the outcome of the condition I would like to delete the current element of the list, and continue iterating over it as usual. I have read a few other threads on this matter. Two solutions seam to be proposed. Either make a dictionary out of the list (which implies making a copy of all the data that is already filling all the RAM in my case). Either walk the list in reverse (which breaks the concept of the alogrithm I want to implement). Is there any better or more elegant way than this to do it ? def walk_list(list_of_g): g_index = 0 while g_index < len(list_of_g): g_current = list_of_g[g_index] if subtle_condition(g_current): list_of_g.pop(g_index) else: g_index = g_index + 1

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• Why does my custom component raise AVs in the IDE?

  - by Mason Wheeler

  I'm trying to write a simple component that will allow you to embed one or more SDL rendering surfaces on a Delphi window, using the SDL 1.3 APIs. It will compile and install just fine, but when I try to use the component in the form designer, it raises AVs whenever I try to access its properties in the object inspector, save the form, or delete the component, and placing one on a form then trying to run gives a linker error: it apparently can't read the DFM properly for whatever reason. The DLL can be found at http://www.libsdl.org/tmp/SDL-1.3-dll.zip and the source code to my component can be downloaded here. SDL.pas is a JEDI-SDL header file; the rest is my own code. I don't see any reason for this to raise AVs in the form designer. If I dynamically create the control at runtime I don't have any stability issues. Can anyone take a look at this and maybe provide some feedback that might help me clear it up?

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• Adding ID's to google map markers

  - by Nick

  I have a script that loops and adds markers one at a time. I am trying to get the current marker to have an info window and and only have 5 markers on a map at a time (4 without info windows and 1 with) How would i add an id to each marker so that i can delete and close info windows as needed. this is the function i am using to set the marker function codeAddress(address, contentString) { var infowindow = new google.maps.InfoWindow({ content: contentString }); if (geocoder) { geocoder.geocode( { 'address': address}, function(results, status) { if (status == google.maps.GeocoderStatus.OK) { map.setCenter(results[0].geometry.location); var marker = new google.maps.Marker({ map: map, position: results[0].geometry.location }); infowindow.open(map,marker); } else { alert("Geocode was not successful for the following reason: " + status); } }); } }

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• Embedded Linux: Memory Fragmentation

  - by waffleman

  In many embedded systems, memory fragmentation is a concern. Particularly, for software that runs for long periods of time (months, years, etc...). For many projects, the solution is to simply not use dynamic memory allocation such as malloc/free and new/delete. Global memory is used whenever possible and memory pools for types that are frequently allocated and deallocated are good strategies to avoid dynamic memory management use. In Embedded Linux how is this addressed? I see many libraries use dynamic memory. Is there mechanism that the OS uses to prevent memory fragmentation? Does it clean up the heap periodically? Or should one avoid using these libraries in an embedded environment?

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