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• Looking for programs on audio tape/cassette containing programs for Sinclair ZX80 PC?

  - by DVK

  OK, so back before ice age, I recall having a Sinclair ZX80 PC (with TV as a display, and a cassette tape player as storage device). Obviously, the programs on cassette tapes made a very distinct sound (er... noise) when playing the tape... I was wondering if someone still had those tapes? The reason (and the reason this Q is programming related) is that IIRC different languages made somewhat different pitched noises, but I would like to run the tape and listen myself to confirm if that was really the case...

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• Arbitrary-precision random numbers in C: generation for Monte Carlo simulation without atmospheric n

  - by Yktula

  I know that there are other questions similar to this one, however the following question pertains to arbitrary-precision random number generation in C for use in Monte Carlo simulation. How can we generate good quality arbitrary-precision random numbers in C, when atmospheric noise isn't always available, without relying on disk i/o or network access that would create bottlenecks? libgmp is capable of generating random numbers, but, like other implementations of pseudo-random number generators, it requires a seed. As the manual mentions, "the system time is quite easy to guess, so if unpredictability is required then it should definitely not be the only source for the seed value." Is there a portable/ported library for generating random numbers, or seeds for random numbers? The libgmp also mentions that "On some systems there's a special device /dev/random which provides random data better suited for use as a seed." However, /dev/random and /dev/urandom can only be used on *nix systems.

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• iPhone Simulator chrashes in NSKeyedUnarchiver after setting base SDK

  - by Florian

  Hi! I started a project in xcode (3.2 on snow leopard) with base sdk 3.1.2. Now I changed this setting to 3.0 and it compiles without a warning. There are no problems running the app on the device, but the simulator crashes on launch every time with the following exception: Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '[NSKeyedUnarchiver initForReadingWithData:]: incomprehensible archive (0x4e, 0x49, 0x42, 0x41, 0x72, 0x63, 0x68, 0x69)' I do not use the NSKeyedUnarchiver, so why is the app trying to call it? And what archive is incomprehensible? I reset the simulator before building, so there are no userDefaults or anything else around. Thanks for your help!

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• Entity Framework, full-text search and temporary tables

  - by markus

  I have a LINQ-2-Entity query builder, nesting different kinds of Where clauses depending on a fairly complex search form. Works great so far. Now I need to use a SQL Server fulltext search index in some of my queries. Is there any chance to add the search term directly to the LINQ query, and have the score available as a selectable property? If not, I could write a stored procedure to load a list of all row IDs matching the full-text search criteria, and then use a LINQ-2-Entity query to load the detail data and evaluate other optional filter criteria in a loop per row. That would be of course a very bad idea performance-wise. Another option would be to use a stored procedure to insert all row IDs matching the full-text search into a temporary table, and then let the LINQ query join the temporary table. Question is: how to join a temporary table in a LINQ query, as it cannot be part of the entity model?

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• FLEX, Actionscript: 2 questions about mouseOver event and image scaling

  - by Patrick

  hi, 1) if I create items in a for loop, is correct to add a new eventListener for each item ? Or should I add only 1 eventListener to the parent ? and call the event through ID ? 2) if I want to scale my item, (a LinkButton with icon image), I noticed that the icon is sometimes resized with delay, so I have a bit of flickering when I trigger the event. Should I not use icons, and set the image in another way ? How can I fix this ? thanks

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• (Android SDk 2.1) Getting error when I use setAudioSource and setVideoSource

  - by Rainfer

  I got the follow error when I run setAudioSource and setVideoSource. 03-16 10:26:25.302: ERROR/audio_input(52): unsupported parameter: x-pvmf/media-input-node/cap-config-interface;valtype=key_specific_value 03-16 10:26:25.302: ERROR/audio_input(52): VerifyAndSetParameter failed 03-16 10:26:25.302: ERROR/CameraInput(52): Unsupported parameter(x-pvmf/media-input-node/cap-config-interface;valtype=key_specific_value) 03-16 10:26:25.302: ERROR/CameraInput(52): VerifiyAndSetParameter failed on parameter #0 This error happen on both emulator and the device. (I am using Google nexus one) I have set the CAMERA and RECORD_AUDIO user permission already. I spent many days but I still cannot figure out what is the cause of this runtime error.

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• Limit a program's execution time in C (Monte Carlo technique)

  - by rrs90

  I am working on a project which has no determined algorithm to solve using C language. I am Using Monte Carlo technique for solving that problem. And the number of random guesses I want to limit to the execution time specified by the user. This means I want to make full use of the execution time limit defined by the user (as a command line argument) to make as many random iterations as possible. Can I check the execution time elapsed so far for a loop condition. Eg: for(trials=0;execution_time P.S. I am using code blocks 10.05 for coding and GNU compiler.

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• Limiting landscape views in UITabBarController containing UINavigationController

  - by Spider-Paddy

  I have a tab bar application that contains navigation views in 2 of its tabs. I would like 1 view in the 1 navigation controller to allow landscape view but because of the nav bar in tab bar limitation I now have to allow landscape views for every single view in my app to make the tilt messages get passed to my app which I don't want. I thought perhaps, on the views which shouldn't go to landscape, that there might be ways to either: prevent the view change e.g. calling setOrientation:UIDeviceOrientationPortrait whenever the device goes landscape or giving the illusion that the view doesn't change e.g. presenting a modal portrait view over the rotated view Anybody have any ideas or experience that they care to share? What is the best approach here? (I don't want to now have to design a landscape view for every view just to so that I can display a portrait & landscape view for 1 view)

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• Fastest way to calculate an X-bit bitmask?

  - by Virtlink

  I have been trying to solve this problem for a while, but couldn't with just integer arithmetic and bitwise operators. However, I think its possible and it should be fairly easy. What am I missing? The problem: to get an integer value of arbitrary length (this is not relevant to the problem) with it's X least significant bits sets to 1 and the rest to 0. For example, given the number 31, I need to get an integer value which equals 0x7FFFFFFF (31 least significant bits are 1 and the rest zeros). Of course, using a loop OR-ing a shifted 1 to an integer X times will do the job. But that's not the solution I'm looking for. It should be more in the direction of (X << Y - 1), thus using no loops.

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• COM port cannot be opened in asp.net

  - by Pandiya Chendur

  I following this article for sending SMS it is a winform application.. I have referenced all the Dll's to my asp.net application..... I use an aspx page to detect a mobile device connected to a PC..... But it alwys shows COM 'n' Port could not be opened..... using SMS; using GsmComm.GsmCommunication; using GsmComm.PduConverter; public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { GsmCommMain comm = new GsmCommMain(6, 9600, 300); comm.Open(); if (!comm.IsConnected()) { Response.Write("No Phone Connected"); } else { SmsSubmitPdu pdu = new SmsSubmitPdu("test", "+919999999999", ""); CommSetting.comm.SendMessage(pdu); } } }

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• How to get an array from a database in Rails3 even when there's only one record?

  - by yuval

  In Rails3, I have the following line: @messages = Message.where("recipient_deleted = ?", false).find_by_recipient_id(@user.id) In my view, I loop through @messages and print out each message, as such: <% for message in @messages %> <%= message.sender_id %> <%= message.created_at %> <%= message.body %> <% end %> This works flawlessly when there are several messages. The problem is that when I have one message, I get an error thrown at me: undefined methodeach'` How do I force rails to always return an array of messages even if there's only one message so that each always works? Thanks!

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• Why won't the VisualVM Profiler profile my application?

  - by Luke

  I've created a simple 1 file java application that iterates through a loop, calls some functions, allocates some memory, adds some numbers, etc. I run that application via eclipse's Run As->Java Application. The running application shows up in Java VisualVM under Local. I double click on that application and go to the Profiler tab. The default settings are: Start profiling from classes: my.main.package.** Do not profile classes: java.*, javax.*, sun.*, sunw.*, com.sun.* I click on CPU. The CPU and Memory buttons gray out. Nothing happens. The Status says profiling inactive. When my application terminates the Status says application terminated. What am I doing wrong here? Are there some settings I need to tweak? Do I need to set a VM flag when I launch my application?

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• DataGridView Winform Auto Insert Ordinal Column (Trick)

  - by pang

  I want to get some trick for this problem. I have my table like this Product (uuid, Name) and one datagridview to display this information ( dataGridView.DataSouce = Products which is assign on runtime) My problem is that I want to have "No" column on dataGridView which will show like below No | Name 1 | ProdctA 2 | ProductB 3 | ProductC What I do right now is create a "No" field on my product Model, and loop through all the row and assign value to it. I think this is not a good solution. Hope anyone can suggest better solution. Thanks,

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• problem creating object "wscript.shell"

  - by sushant

  my script looks like: Dim WshShell, oExec Set WshShell = CreateObject("WScript.Shell") Set oExec = WshShell.Exec("cmd /c cd D:\d & D: & winzip32.exe -min -a D:\a") Do While oExec.Status = 0 WScript.Sleep 100 Loop WScript.Echo oExec.Status The idea was to use explorer to open these files. The problem I'm having though is on the line: Set WshShell = CreateObject("WScript.Shell") I keep getting the message ActiveX component can't create object: 'WScript.Shell' I'm totally confused because this exact same code runs fine if I write it in a .htm file. Why does my browser treat my .asp page differently than the .html file? How do i fix this problem?

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• Jagged arrays in C#

  - by chupinette

  Hello! Im trying to store to array of ints in a jagged array: while (dr5.Read()) { customer_id[i] = int.Parse(dr5["customer_id"].ToString()); i++; } dr5 is a datareader. I am storing the customer_id in an array, i also want to store scores in another array. I want to have something like below within the while loop int[] customer_id = { 1, 2 }; int[] score = { 3, 4}; int[][] final_array = { customer_id, score }; Can anyone help me please ?

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• How to implement UIViewController rotation in response to orientation changes?

  - by Greg Maletic

  My app has about 10 different UIViewControllers, just one of which I want to switch to landscape mode if the device is rotated. (All the rest, I want to keep in portrait.) In order to implement rotation on that one view, I needed to implement its controller's 'shouldAutorotate' method and return YES. Since this view is accessed via a navigation controller, I also needed to create a subclass of UINavigationController that implements 'shouldAutorotate' and return YES. This solution works, but too well. I find that all of the UIViewControllers I push onto my subclass of UINavigationController respond to rotation, even if I implement 'shouldAutorotate' and return NO. (Remember: I only want one particular UIViewController to respond to rotation, not every one in the navigation controller's stack.) So, my question is: how do I best do this? All the solutions I can come up with seem 1) cumbersome, and 2) worse, don't seem to work. Thanks very much.

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• How to do logout functionality in C# window application?

  - by Shailesh Jaiswal

  I am developng Smart device application in C#. It is a window application. In this application I am using Login form to authenticate the users. Only authenticated users can login into the system. I using statc variables in this application so that they can be used at application level. After deploying the application I can see that emulator provides the close button with multiplicaton symbol. In this way I can close my form as well as application. But I want to provde one logout link in my application. Can I provide logout functionality in C# window applicain ? If yes, how to do that ? Please make sure that all the functions of .net framework does not work with .net compact framwork? Can you provide me the code or link through which can resolve the above issue ?

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• AHCI Driver for own OS

  - by user1496761

  I have been programming a little AHCI driver for two weeks. I have read this article and Intel's Serial ATA Advanced Host Controller Interface (AHCI) 1.3. There is an example, which shows how to read sectors via DMA mode (osdev.org). I have done this operation (ATA_CMD_READ_DMA 0xC8) successfully, but when i tried to write sectors (ATA_CMD_WRITE_DMA 0xCA) to the device, the HBA set the error Offset 30h: PxSERR – Port x Serial ATA Error - Handshake Error (this is decoding from Intel AHCI specification). I don't understand why it happened. Please, help me. In addition, I have tried to issue the command IDENTIFY 0xEC, but not successfully...

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• How to stop the android soft keyboard from ever coming up in my entire application

  - by JohnnyLambada

  I'm developing an application on a hardware device that has a built-in hardware keyboard that does not slide out so is always visible (like a blackberry). Therefore, I NEVER want the soft keyboard to display for my entire application. I'm aware of another SO question that gives the following lines of code: InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE); imm.hideSoftInputFromWindow(myEditText.getWindowToken(), 0); But I don't know where to put this code to hide the soft keyboard in all places where it might possibly appear in my Activity. I have tried adding the code to Activity.onUserInteraction to no avail. It seems the keyboard appears after the onUserInteraction executes.

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• Base64 Encode String in VBScript

  - by Patrick Cuff

  I have a web service load driver that's a Windows Script File (WSF), that includes some VBScript and JavaScript files. My web service requires that the incoming message is base64 encoded. I currently have a VBScript function that does this, but it's very inefficient (memory intensive, mostly due to VBScripts awful string concatenation) [Aside; Yes, I've seen Jeff's latest blog post. The concatenation is happening in a loop across messages that are 1,000's to 10,000's bytes in size.] I've tried using some custom string concatenation routines; one using an array and one using ADODB.Stream. These help, a little, but I think it would help more if I had some other way of encoding the message rather than via my own VBS function. Is there some other way of encoding my message, preferebly using native Windows methods?

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• In R, when using named rows, can a sparse matrix column be added to another sparse matrix?

  - by ayman

  I have two sparse matrices, m1 and m2: > m1 <- Matrix(data=0,nrow=2, ncol=1, sparse=TRUE, dimnames=list(c("b","d"),NULL)) > m2 <- Matrix(data=0,nrow=2, ncol=1, sparse=TRUE, dimnames=list(c("a","b"),NULL)) > m1["b",1]<- 4 > m2["a",1]<- 5 > m1 2 x 1 sparse Matrix of class "dgCMatrix" b 4 d . > m2 2 x 1 sparse Matrix of class "dgCMatrix" a 5 b . > and I want to cbind() them to make a sparse matrix like: [,1] [,2] a . 5 b 4 . d . . however cbind() ignores the named rows: > cbind(m1[,1],m2[,1]) [,1] [,2] b 4 5 d 0 0 is there some way to do this without a brute force loop?

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• Java IndexOutOfBoundsException

  - by Meko

  Hi all ... I made an little shoot em up game..It works normal but I want also implement if fires intersects they will disappear. I have two list for Player bullets and for computer bullets ...But if I have more bullets from computer or reverse .Here my loop for (int i = 0; i < cb.size(); i++) { for (int j = 0; j < b.size(); j++) { if (b.get(j).rect.intersects(cb.get(i).rect)) { cb.remove(i); b.remove(j); continue; } if (cb.get(i).rect.intersects(b.get(j).rect)) { b.remove(j); cb.remove(i); continue; } } }

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• PHP mysql select results

  - by Jordan Pagaduan

  <?php $sql = " SELECT e.*, l.counts AS l_counts, l.date AS l_date, lo.counts AS lo_counts, lo.date AS lo_date FROM employee e LEFT JOIN logs l ON l.employee_id = e.employee_id LEFT JOIN logout lo ON lo.employee_id = e.employee_id WHERE e.employee_id =" .(int)$_GET['salary']; $query = mysql_query($sql); $rows = mysql_fetch_array($query); while($countlog = $rows['l_counts']) { echo $countlog; } echo $rows['first_name']; echo $rows['last_name_name']; ?> I got what I want to my first_name and last_name(get only 1 results). The l_counts I wanted to loop that thing but the result is not stop counting until my pc needs to restart. LoL. How can I get the exact result of that? I only need to get the exact results of l_counts. Thank you Jordan Pagaduan

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• How to manually render a Django template for an inlineformset_factory with can_delete = True / False

  - by chefsmart

  I have an inlineformset with a custom Modelform. So it looks something like this: MyInlineFormSet = inlineformset_factory(MyMainModel, MyInlineModel, form=MyCustomInlineModelForm) I am rendering this inlineformset manually in a template so that I have more control over widgets and javascript. So I go in a loop like {% for form in myformset.forms %} and then manually render each field as described on this page http://docs.djangoproject.com/en/dev/topics/forms/#customizing-the-form-template The formset has can_delete = True or can_delete = False depending on whether the user is creating new objects or editing existing ones. Question is, how do I manually render the can_delete checkbox?

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• Milliseconds in DateTime.Now on .NET Compact Framework always zero?

  - by Marcel

  Hi all, i want to have a time stamp for logs on a Windows Mobile project. The accuracy must be in the range a hundred milliseconds at least. However my call to DateTime.Now returns a DateTime object with the Millisecond property set to zero. Also the Ticks property is rounded accordingly. How to get better time accuracy? Remember, that my code runs on on the Compact Framework, version 3.5. I use a HTC touch Pro 2 device.

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