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• Parameters with default value not in PsBoundParameters?

  - by stej

  General code Consider this code: PS> function Test { param($p='default value') $PsBoundParameters } PS> Test 'some value' Key Value --- ----- p some value PS> Test # nothing I would expect that $PsBoundParameters would contain record for $p variable on both cases. Is that correct behaviour? Question I'd like to use splatting for a lot of functions that would work like this: function SomeFuncWithManyRequiredParams { param( [Parameter(Mandatory=$true)][string]$p1, [Parameter(Mandatory=$true)][string]$p2, [Parameter(Mandatory=$true)][string]$p3, ...other parameters ) ... } function SimplifiedFuncWithDefaultValues { param( [Parameter(Mandatory=$false)][string]$p1='default for p1', [Parameter(Mandatory=$false)][string]$p2='default for p2', [Parameter(Mandatory=$false)][string]$p3='default for p3', ...other parameters ) SomeFuncWithManyRequiredParams @PsBoundParameters } I have more functions like this and I don't want to call SomeFuncWithManyRequiredParams with all the params enumerated: SomeFuncWithManyRequiredParams -p1 $p1 -p2 $p2 -p3 $p3 ... Is it possible?

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• Embedding QT application in Eclipse/RCP framework

  - by mots_g

  Hi, I'm trying to embed my working QT application in Eclipse RCP framework(might not sound wise but i need to do this). I'm using QT 4.5 (not yet explored what QTJambi is all about and has to offer) I convert my existing application as a dll and load it through eclipse application. Things dont work as they should as the QTApplication loop sits listening for events, and there is a good mismatch of events. Certain UI objects dont get the events. If I comment my Qppliaction::exec(), then the behaviour in QT app changes. Is there a way to achieve what I'm trying to achieve?? Thanks

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• Proper usage (best practices) of Browsable attribute in .NET for runtime grid component behavior

  - by Dan

  I understand how Browsable attribute is supposed to work. It's supposed to hide a property from showing up in a PropertyGrid in design time. It also has another effect in that it will stop a Property from showing up in components such as Grids, or specifically Infragistics WinGrid. I am not sure if it has this behaviour on regular Windows Forms grids. This works, but it doesn't sound like Browsable is being use as intended when being used for 'Run time' displaying of a property on a grid component. Any literature from Microsoft on proper use. Even though it works, I don't want to use this attribute to hide columns on a grid bound to a business object if it's not indeed the correct usage of the attribute, but rather something some grid vendors decided to use to determine property visibility on their grids.

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• Javascript undefined behavior with string.replace

  - by epochwolf

  I've been messing around with string.replace and I noticed something very odd with Webkit and Firebug's javascript consoles. I can repeat this behavior in a blank browser window. (Look at the first and last lines) >>> "/literature?page=".replace(/page=/i, "page=2") "/literature?page=" >>> "/literature?page=".replace("page=", "page=2") "/literature?page=2" >>> "/literature?page=".replace(/page=/, "page=2") "/literature?page=2" >>> "/literature?page=".replace(/page=/i, "page=2") "/literature?page=2" Just so nobody thinks I mistyped something, here are screenshots. Firebug (3.0.14) Webkit (Latest nightly as of this post's creation.)

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• Get the full URI from the href property of a link

  - by Savageman

  Hello SO, I would like to have a confirmation on some point. My goal is to always get the same string (which is the URI in my case) while reading the href property from a link. Example: <a href="test.htm" /> with base_url = http://domain.name/ <a href="../test.htm" /> with base_url = http://domain.name/domain/ <a href="http://domain.name/test.htm" /> with base_url = any folder from http://domain.name/ I need to get http://domain.name/test.htm from the 3 situations above (or any other identical string). After some tests, it appears that my_a_dom_node.href always return the full-qualified URI, including the http://domaine.name, which should be okay for what I want. jQuery has a different behaviour and $(my_a_dom_node).attr('href') returns the content (text) that appears inside the HTML. So my trick is to use $(my_a_dom_node).get(0).href to get the full URI. The question is: can I rely on this?

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• Programatically check whether a drive letter is a shared/network drive

  - by Philip Daubmeier

  Hi SO community! I searched a while but found nothing that helped me. Is there a way to check whether a drive letter stands for a shared drive/network drive or a local disc in python? I guess there is some windows api function that gives me that info, but I cant find it. Perhaps there is even a method already integrated in python? What I am looking for is something with this or similar behaviour: someMagicMethod("C:\") #outputs True 'is a local drive' someMagicMethod("Z:\") #outputs False 'is a shared drive' That would help me as well: someMagicMethod2() #outputs list of shared drive letters Thanks a lot in advance!

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• href image link download on click

  - by Piero

  Hey all, I generate normal links like: <a href="/path/to/image"><img src="/path/to/image" /></a> in a web app. When I click on the link, it displays the picture in a new page. If you want to save the picture, then you need to right click on it and select "save as" I don't want this behaviour, I would like to have a download box popping out when I click on the link, is that possible just with html or javascript? How? If not I guess I would have to write a download.php scrit and call it into the href with the file name as parameter...? Greetings! :)

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• C# 4: conflicting overloaded methods with optional parameters

  - by Thomas

  I have two overloaded methods, one with an optional parameter. void foo(string a) { } void foo(string a, int b = 0) { } now I call: foo("abc"); interestingly the first overload is called. why not the second overload with optional value set to zero? To be honest, I would have expect the compiler to bring an error, at least a warning to avoid unintentional execution of the wrong method. What's the reason for this behaviour? Why did the C# team define it that way? Thanks for your opinions!

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• C# .NET 4.0 and Generics

  - by Mr Snuffle

  I was wondering if anyone could tell me if this kind of behaviour is possible in C# 4.0 I have an object hierarchy I'd like to keep strongly typed. Something like this class ItemBase {} class ItemType<T> where T : ItemBase { T Base { get; set; } } class EquipmentBase : ItemBase {} class EquipmentType : ItemType<EquipmentBase> {} What I want to be able to do to have something like this ItemType item = new EquipmentType(); And I want item.Base to return type ItemBase. Basically I want to know if it's smart enough to strongly typed generic to a base class without the strong typing. Benefit of this being I can simply cast an ItemType back to an EquipmentType and get all the strongly typedness again. I may be thinking about this all wrong...

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• How to set a control ID in ListView Template dynamically?

  - by citronas

  A have a ListView that is rendered with multiple items. Now I want to toggle some HTML attributes with JQuery. Therefore it would be best to have access to these elements via an unique ID. But trying to create a "dynamic" and therefore unique ID by <tr runat="server" ID='<%# this.GetUniqueID() %>'> </tr> results in an error that tells me that the ID needs to be simple and cannot be set by a call to a method. I know that I can dynamically create controls in the code-behind and set the ID there. But in this case, I'd rather like to let the content be rendered by the ListView itself. That brings me to the conclusion that the idea of setting a dynically ID in the Template is totally wrong. How can I achieve the desired behaviour?

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• Get MAC address from Jetty HTTPServletRequest

  - by Chris Thompson

  Hi all, Does anybody know if there is a way to get the sender's MAC address from an HTTPServletRequest in Jetty? (Note: by sender, I mean immediate sender aka the last hop before my server). If there isn't a direct way, does anybody know a way to translate an IP address to a MAC address in Java? Other note: I completely realize that MAC addresses do not leave the local subnet, and that's the intended functionality. I know this seems like an odd question, but trust me, I know what I'm doing :-) If you're curious, I'd be happy to explain why I want this. Thanks, Chris

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• SQL Server - Schema/Code Analysis Rules - What would your rules include?

  - by Randy Minder

  We're using Visual Studio Database Edition (DBPro) to manage our schema. This is a great tool that, among the many things it can do, can analyse our schema and T-SQL code based on rules (much like what FxCop does with C# code), and flag certain things as warnings and errors. Some example rules might be that every table must have a primary key, no underscore's in column names, every stored procedure must have comments etc. The number of rules built into DBPro is fairly small, and a bit odd. Fortunately DBPro has an API that allows the developer to create their own. I'm curious as to the types of rules you and your DB team would create (both schema rules and T-SQL rules). Looking at some of your rules might help us decide what we should consider. Thanks - Randy

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• Safari wrapping too early

  - by the Hampster

  I've created a class web page with a page for midterm review. It uses jsMath to turn Tex into nice math. (MathML looks awful) Anyway, I would occasionally like to have several problems per line. Each problem is in its own <span>, so if it needs to wrap, it won't split the problem. It all seems to work, except that Safari for the Mac seems overly anxious to wrap, sometimes wrapping at 30% paragraph width. Even under inspection, it reports a width of 663px, but wrapping occurs at around 150px. There is no padding. Firefox renders just fine. A comparison is here: http://davehampson.net/Images/Safaribug.png Sometimes Safari works just fine. The original web page is here: http://math.davehampson.net/index3.php (study guide 2) I don't know if this is a bug in safari, or if there is some odd/subtle css point I am missing. Any help would be appreciated. --Dave

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• Convert a user's search string into a MS SQL `Full-Text Query` Search Phrase

  - by Atomiton

  I've search for answers for this and I can't seem to find an answer to what should be somewhat simple. This is related to another question I asked, but it's different. What's the best way to take a user's search phrase and throw it into a CONTAINSTABLE(table, column, @phrase, topN ) phrase? Say, for example the user inputs: Books by "Dr. Seuss" What's the best way to turn that into something that will return results in my ContainsTAble() phrase? I was previously parsing the search phrase and writing something like ISABOUT("Books" WEIGHT(1.0), "by" WEIGHT(0.9), "Dr. Seuss" WEIGHT(0.8)) as my @phrase but ISABOUT seems to be returning odd results... especially when one word searches are entered. Any Ideas?

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• Uploadify refuses to upload WMV, FLV and MP4 files

  - by Jon Winstanley

  The uploadify plugin for JQuery seems very good and works for most file types. However, it allows me to upload all file types apart from the ones I need! Namely .WMV, .FLV and .MP4 I have googled the issue and not found anyonw having such difficulties. I have already tried changing the fileExt parameter and also tried removing it altogether. I have testing in Google Chrome, IE7 and Firefox and none work for thes efile types. Is there a known reason for this behaviour?

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• Problems with South/Django: not recognizing the Django App

  - by christmasgorilla

  I've got a Django project on my machine and when I try to use South to migrate the data schema, I get several odd errors. Example: $ python manage.py convert_to_south thisLocator /Library/Python/2.6/site-packages/registration/models.py:4: DeprecationWarning: the sha module is deprecated; use the hashlib module instead import sha /Users/cm/code/thisLocator/../thisLocator/batches/models.py:6: DeprecationWarning: the md5 module is deprecated; use hashlib instead import md5 There is no enabled application matching 'thisLocator'. I've followed the South documentation. Settings.py has it in the installed apps, I can run import south from the manage.py shell. Everyone else on my team is calling the app thisLocator. Am I doing something really stupid?

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• Rails, REST Architecture and HTML 5: Cross domain requests with pre-flight requests

  - by Orion

  While working on a project to make our site HTML 5 friendly, we were eager to embrace the new method for Cross Domain requests (no more posting through hidden iframes!!!). Using the Access Control specification we begin setting up some tests to verify the behaviour of various browsers. The current Rails RESTful architecture relies on the four HTTP verbs: GET, POST, PUT, DELETE. However in the Access Control spec, it dictates that non-simple methods (PUT, DELETE) require a pre-flight request using the HTTP verb OPTIONS. In addition during testing we discovered that Firefox 3.5.8 pre-flight POST requests as well. My question is this. Is anyone aware of any project for the Rails framework working to address the issue? If not, any opinions about the best strategy to support the OPTIONS method, since it has to support the routes for all the POST, PUT, DELETE methods?

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• SQL ConnectionString in global.asax overridden by web.config

  - by rlb.usa

  This is going to sound very odd, but I have a web.config like this: <connectionStrings> <remove name="LocalSqlServer"/> <add name="LocalSqlServer" connectionString="Data Source=BACKUPDB;..." providerName="System.Data.SqlClient"/> </connectionStrings> And a global.asax like this: void Session_Start(object sender, EventArgs e) { // Code that runs when a new session is started if (Application["con"] == null || Application["con"] == "") { Application["con"] = "Data Source=PRODUCTIONDB;..."; } } And EVERYWHERE in my code, I reference my ConnectionStrings like this: SqlConnection con = new SqlConnection(Convert.ToString(HttpContext.Current.Application["con"])); However, I see that everything I do inside this application goes to BACKUP db instead of PRODUCTIONDB. What is going on, how could this happen, and why? It doesn't make any sense to me, and it got me into a lot of trouble. We use LocalSqlServer string for FormsAuthentication.

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• convert string to float without silent NaN/Inf conversion

  - by Peter Hansen

  I'd like convert strings to floats using Python 2.6 and later, but without silently converting things like 'NaN' and 'Inf'. Before 2.6, float("NaN") would raise a ValueError. Now it returns a float for which math.isnan() returns True, which is not useful behaviour for my application. Here's what I've got at the moment: import math def get_floats(source): for text in source.split(): try: val = float(text) if math.isnan(val) or math.isinf(val): raise ValueError yield val except ValueError: pass This is a generator, which I can supply with strings containing whitespace-separated sequences representing real numbers. I'd like it to yield only those fields which are purely numeric representations of floats, as in "1.23" or "-34e6", but not for example "NaN" or "-Inf". Test case: assert list(get_floats('1.23 -34e6 NaN -Inf')) == [1.23, -34000000.0] Please suggest alternatives you consider more elegant, even if they involve "look before you leap" (which is normally considered a lesser approach in Python).

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• Why did my flash drive become "read only" and (how) can I fix it?

  - by Bob

  I have a brand new flash drive (one week old) that has become marked as read only, by Windows, Kubuntu and a bootable partitioner. Why did this happen? Is it fixable? If it is, how can I fix this? The problem Firstly, this drive is new. It's certainly not been used enough to die from normal wear and tear, though I would not discount defective components. The drive itself has somehow become locked in a read only state. Windows' Disk management: Diskpart: Generic Flash Disk USB Device Disk ID: 33FA33FA Type : USB Status : Online Path : 0 Target : 0 LUN ID : 0 Location Path : UNAVAILABLE Current Read-only State : Yes Read-only : No Boot Disk : No Pagefile Disk : No Hibernation File Disk : No Crashdump Disk : No Clustered Disk : No What really confuses me is Current Read-only State : Yes and Read-only : No. Attempted solutions So far, I've tried: Formatting it in Windows (in Disk management, the format options are greyed out when right clicking). DiskPart Clean (CLEAN - Clear the configuration information, or all information, off the disk.): DISKPART> clean DiskPart has encountered an error: The media is write protected. See the System Event Log for more information. There was nothing in the event log. Windows command line format >format G: Insert new disk for drive G: and press ENTER when ready... The type of the file system is FAT32. Verifying 7740M Cannot format. This volume is write protected. Windows chkdsk: see below for details Kubuntu fsck (through VirtualBox USB passthrough): see below for details Acronis True Image to format, to convert to GPT, to destroy and rebuild MBR, basically anything: failed (could not write to MBR) Details (and a nice story) Background This was a brand new, generic, 8GB flash drive I wanted to create a multiboot flash drive with. It came formatted as FAT32, though oddly a little larger than most 8 GIGAbyte flash drives I've come across. Approximately 127MB was listed as "used" by Windows. I never discovered why. The end usable space was about what I normally expect from a 8GB drive (approx 7.4 GIBIbytes). I had thrown quite a few Linux distros on, along with a copy of Hiren's. They would all boot perfectly. They were put on with YUMI. When I tried to put the Knoppix DVD on, YUMI added an odd video option to its boot comman which caused Knoppix to boot with a black screen on X. ttys 1 through 6 still worked as text only interfaces. A few days later, I took some time to take that odd video option off, making the boot command match the one that comes with Knoppix. On the attempt to boot, Knoppix reported some form of LZMA corruption. Leading up to the current issue I was thinking the Knoppix files may have been corrupted somehow, so I tried reloading it. The drive was nearly full (45MB free), so I deleted a generic ISO that also was not booting. That went fine. I then went through YUMI to 'uninstall' Knoppix, i.e. delete files and remove from the menus. The files went first, then the menus were cleared successfully. However, the free space was stuck at about 700MB, same as it was before removing Knoppix. In the old Knoppix folder, there was a 0 byte file named KNOPPIX that could not be deleted. I tried reinserting the drive to delete this file - without safely removing, if that made a difference (hey, first time for everything). Running the standard Windows chkdsk scan without /r or /f reported errors found. Running with /r just got it stuck. I decided to give fsck a shot, so I loaded up my Kubuntu VM and attached the drive to it with VirtualBox's USB 2.0 passthrough. I umounted it (/dev/sda1) and ran a fsck. There are differences between boot sector and its backup. I chose No action. It told me FATs differ and asked me to select either the first or second FAT. Whichever I selected, I got a notice of Free cluster summary wrong. If I chose Correct, it gave a list of incorrect file names. To try to fix something, at least, I ran it with the -p option. Halfway through fixing the files, the VM froze - I ended its process about ten minutes later. Cause? My next attempt was to use YUMI, again, to rebuild the whole drive. I used YUMI's built in reformat (to FAT32) option and installed a Kubuntu ISO (700MB). The format was successful, however, the extract and copy of Kubuntu (which YUMI uses a 7zip binary for) froze at about 60% done. After waiting for about fifteen minutes (longer than the 3.5GB Knoppix ISO took last time), I pulled the drive out. The drive at this point was already formatted, SYSLINUX already installed, just waiting on the unpacking of an ISO and the modifying of the boot menus. Plugging it back in, it came up as normal - however, any write action would fail. Disk management reported it as read only. On reconnect, it would come up as normal but a write operation would cause it to go read only again. After a few attempts, it started coming up as read only on insertion. Attempts to fix This is when I ran through the attempts listed above, to try and reformat it in case of a faulty format. However the inability to do so even on a bootable disk indicated something more serious is wrong. chkdsk now reports nothing is wrong, and fsck still reports MBR inconsistencies, but now always chooses first FAT automatically after telling me FATs differ. It still does the same Free cluster summary wrong afterwards. I cannot run with -p anymore because it is now marked as read only. It also managed to corrupt my VM's disk somehow on the first attempt (yes, I'm sure I chose sda, which is mapped to a 7.4GB drive - I triple checked). Thank god for snapshots? I'm just about out of ideas. To my inexperienced mind it looks like something in the drive's firmware set it to read only "permanently" somehow - is there any way to reset this? I don't particularly care about keeping data, considering I've reformatted it twice. Also, fixes that keep me in Windows are better; it reduces the risk of me accidentally nuking my main hard drive. Update 1: I pulled apart the drive out of curiosity. As you can see, there are no obvious write protect switches. There is an IC on the other side, ALCOR branded labelled AU6989HL, if that matters. If there appears to be no way to fix this, I'll probably pull out the (glued down) card and put it in a card reader to check if it's the card or the controller that died. Update 2: I've pulled the card off, Windows detects the drive as a card reader now. The contacts on the card don't appear to be used, and there are several rows of holes on the card itself. Putting it into the card reader only detects about 30MB total, RAW. It's probably either the reader incorrectly reporting the card as faulty (as if a real SD card's write protect was switched on) or a bad contact somewhere. If nothing else, I have a spare 8GB Micro SD card now... as soon as I figure out how to format it as 8GB.

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• Problem retrieving Hostaddress from Win32_TCPIPPrinterPort

  - by Anthony

  I'm running into an odd issue retrieving printer port addresses. When I get all the entries in Win32_TCPIPPrinterPort, the HostAddress field (which should have the IP address) is usually blank/null, only the port name has a value. To make it a bit stranger, if a particular port is not in use by any printer, THEN the HostAddress will have the the proper value. The C# code is simple, and results in something like this; IP_192.168.1.100, printerportxyz, richTextBox1.Clear(); ManagementObjectSearcher portSearcher = new ManagementObjectSearcher("root\\CIMV2", "SELECT * FROM Win32_TCPIPPrinterPort"); foreach (ManagementObject port in portSearcher.Get()) { richTextBox1.AppendText( String.Format("Name: {0} HostAddress: {1}", port["Name"], port["HostAddress"]) ); } I also tried the same thing in WSH/VBS, and saw the same behavior.

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• Is it possible to access a Silverlight control via the COM automation model?

  - by dlanod

  What I'm trying to attempt is to access methods on a Silverlight control via the COM automation model. Theoretically it should be possible, as exposing the Silverlight control's methods as scriptable members exposes them through an IDispatch interface. I have been able to access the IDispatch interface through the automation model correctly but when I attempt to call a method on the exposed interface via Invoke it crashes. I was wondering if anyone knew whether this was expected behaviour, i.e. I'm violating some basic sandboxing requirement, or whether this should work and it is just something in my implementation that needs correcting? Cheers.

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• Setting a session variable in Global.asax causes AJAX errors

  - by Fly_Trap

  I'm getting a very peculiar problem with my asp.net application, it took me an age to track down but I still don't know what is causing this behaviour. If I set a session variable in the Application_PreRequestHandlerExecute event, then my external JavaScript files are ignored, and therfore causing a raft of errors. I have simplified the problem below. E.g. I have file called JScript.js containing the code: function myAlert() { alert("Hi World"); } And in my Default.aspx file I reference the js with the code: <script src="JScript.js" type="text/javascript"></script> And in the body onload event I call the myAlert() function: <body onload="myAlert()"> And finally in the Global.asax file: Private Sub Application_PreRequestHandlerExecute(ByVal sender As Object, ByVal e As EventArgs) HttpContext.Current.Session("myVar") = "MyValue" End Sub If you run the Default.aspx file you will see the js function isnt called, however, if you comment out the line of code Global.asax then the external js is called and the function executed when the page loads. Why is this?

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• IE6 - body shrink on hover / z-index change

  - by Kasper

  I'm debugging a site to make it work for IE6 (god, please, let this be the last time). I've gotten pretty far with getting the the layout look right. There's just one more thing bugging me. Some elements like links, when they get hovered, the body of the site shrinks. I have built a dropdown with javascript. When it should show, the body of the site shrinks. There is a slideshow, made with javascript, which changes the z-index of the images, everytime it changes the z-index, the body shrinks. Now I found some information that IE6 creates this specific shrinking behaviour when using a fixed position element. But this is not the case. Someone here have some ideas for solving this? Thanks!

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• .net difference between right shift and left shift keys

  - by Mr AH

  I am currently working on an application which requires different behaviour based on whether the user presses the right or left shift key (RShiftKey, LShiftKey), however when either of these keys is pressed I only see ShiftKey | Shift. Is there something wrong with my keyboard? (laptop) do I need a new keyboard driver/keyboard in order to send the different key commands maybe... This is a pretty massive problem at the moment, as there is no way of testing that the code works (apart from unit tests). Anyone had any experience of the different shift/alt/ctrl keys?

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