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• Recommended Model Based Testing Tools

  - by ModelTester

  Does anyone have any suggestions on what Model Based Testing Tools to use? Is Spec Explorer/SPEC# worth it's weight in tester training? What I have traditionally done is create a Visio Model where I call out the states and associated variables, outputs and expected results from each state. Then in a completely disconnected way, I data drive my test scripts with those variables based on that model. But, they are not connected. I want a way to create a model, associate the variables in a business friendly way, that will then build the data parameters for the scripts. I can't be the first person to need this. Is there a tool out there that will do basically that? Short of developing it myself.

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• database for streets world wide?

  - by fayer

  i use the downloadable geonames database for all countries, states, counties and cities in the world. but i wonder if there is a database for streets? so you could pick: country - state/department/district - (county/region) - city - street in whatever country you like? cause when i do a search for a street in google map i can see all the upper levels (country/region/city). is there a database you could download for mysql for this? there has to be a database for this, cause there are always national companies that provide this kind of information. where did they get it from? thanks in advance!

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• Avoid generating empty STDOUT and STDERR files with Sun Grid Engine (SGE) and array jobs

  - by vy32

  I am running array jobs with Sun Grid Engine (SGE). My carefully scripted array job workers generate no stdout and no stderr when they function properly. Unfortunately, SGE insists on creating an empty stdout and stderr file for each run. Sun's manual states: STDOUT and STDERR of array job tasks will be written into dif- ferent files with the default location .['e'|'o']'.' In order to change this default, the -e and -o options (see above) can be used together with the pseudo-environment-vari- ables $HOME, $USER, $JOB_ID, $JOB_NAME, $HOSTNAME, and $SGE_TASK_ID. Note, that you can use the output redirection to divert the out- put of all tasks into the same file, but the result of this is undefined. I would like to have the output files suppressed if they are empty. Is there any way to do this?

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• button inside table view cell shows highlighted state on tapping on cell

  - by Vivek Dandage

  Hi there! I have an issue with the background image of button which is dependent of button state. I have a button inside customized table view cell and i have set different images for button's different states. Please look into the code below. [btnNow setImage:[UIImage imageNamed:@"now_norm.png"] forState:UIControlStateNormal]; [btnNow setImage:[UIImage imageNamed:@"now_focus.png"] forState:UIControlStateHighlighted]; Whenever i tap on the actual button this works great but if i tap on area outside of button but which is still inside that same cell then this button changes its background image from UIControlStateNormal to UIControlStateHighlighted. If i remove background image from UIControlStateHighlighted state then this issue doesn't exists but i need pressed state of the button. Please help me out. Thanks in advance! Vivek Dandage.

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• Need some clarification on Bankers Algorithm

  - by Moonshield

  Hi, just a quick query about safe/unsafe states in Dijkstra's Banker's algorithm... If one of the processes in the snapshot of the system (for example the one below) already has all of its needs fulfilled and there are not sufficient resources available to fulfil the needs of any of the other processes, is the system in a safe state? I know normally we assume that once a process receives its required resources it will terminate soon after and return all resources, but is this assumption factored in when we calculate the state of the system? Allocated Maximum Available | A | B | A | B A | B ---+---+--- ---+---+--- ---+--- P1 | 1 | 2 P1 | 1 | 2 1 | 3 P2 | 5 | 3 P2 | 7 | 8

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• Why use I-prefix for interfaces in Java?

  - by Lars Andren

  Is there some reason why people use I-prefix for interfaces in Java? It seems to be a C#-convention spilling over. For C# it makes sense, as the answers to this question explains. However, for Java a class declaration clearly states which class that is extended and which interfaces that are implemented: public class Crow extends Animal implements Bird I think Joshua Bloch didn't suggest this in Effective Java, and I think he usually makes a lot of sense. I get the I-verbing as presented in an answer to the question above, but is there some other use with this convention for Java?

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• How do I choose files from the local filesystem in Windows Phone 7

  - by Kris Erickson

  I'm trying to choose some files to upload in Windows Phone 7 (in the emulator), and any attempt to ShowDialog of the OpenFileDialog leads to a Security Exception. The open file dialog is being called from an event on a button click but I get a SecurityException [FileDialog_ActiveScripting] Arguments: Debugging resource strings are unavailable. Often the key and arguments provide sufficient information to diagnose the problem. See http://go.microsoft.com/fwlink/?linkid=106663&Version=3.0.40806.0&File=System.Windows.dll&Key=FileDialog_ActiveScripting Looking up the SecurityException in the Silverlight version of OpenFileDialog.ShowDialog states that the error is: Active Scripting in Internet Explorer is disabled. -or- The call to the ShowDialog method was not made from user-initiated code. Anyone had any luck with the OpenFileDialog and ShowDialog in Windows Phone 7?

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• Web Standards alternatives to Flex/Silverlight (I mean serious alternatives, not just JS framewoks)

  - by user252160

  Is there a set of open standards technologies that I can use to achieve the same way of development as in Flex and Sivlerlight? I am talking about componentization, separation of concerns, rich graphics, states and effects . Please point out some tutorials and other resources if possible. P.S. I KNOW that this is technically possible, so please do not respond by sending google search results or general JQuery tutorials. I've seen those already. I need to know how a Flex / Silverlight developer could design and implement an application in roughly the same way (imagine a rich HTML tag set, much like XAML/MXML, behind which stands JavaScript responsible for handling events and business logic. Think also about binding)

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• In Clojure - How do I access keys in a vector of structs

  - by Nick

  I have the following vector of structs: (defstruct #^{:doc "Basic structure for book information."} book :title :authors :price) (def #^{:doc "The top ten Amazon best sellers on 16 Mar 2010."} best-sellers [(struct book "The Big Short" ["Michael Lewis"] 15.09) (struct book "The Help" ["Kathryn Stockett"] 9.50) (struct book "Change Your Prain, Change Your Body" ["Daniel G. Amen M.D."] 14.29) (struct book "Food Rules" ["Michael Pollan"] 5.00) (struct book "Courage and Consequence" ["Karl Rove"] 16.50) (struct book "A Patriot's History of the United States" ["Larry Schweikart","Michael Allen"] 12.00) (struct book "The 48 Laws of Power" ["Robert Greene"] 11.00) (struct book "The Five Thousand Year Leap" ["W. Cleon Skousen","James Michael Pratt","Carlos L Packard","Evan Frederickson"] 10.97) (struct book "Chelsea Chelsea Bang Bang" ["Chelsea Handler"] 14.03) (struct book "The Kind Diet" ["Alicia Silverstone","Neal D. Barnard M.D."] 16.00)]) I would like to sum the prices of all the books in the vector. What I have is the following: (defn get-price "Same as print-book but handling multiple authors on a single book" [ {:keys [title authors price]} ] price) Then I: (reduce + (map get-price best-sellers)) Is there a way of doing this without mapping the "get-price" function over the vector? Or is there an idiomatic way of approaching this problem?

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• Practical non-Turing-complete languages?

  - by Kyle Cronin

  Nearly all programming languages used are Turing Complete, and while this affords the language to represent any computable algorithm, it also comes with its own set of problems. Seeing as all the algorithms I write are intended to halt, I would like to be able to represent them in a language that guarantees they will halt. Regular expressions used for matching strings and finite state machines are used when lexing, but I'm wondering if there's a more general, broadly language that's not Turing complete? edit: I should clarify, by 'general purpose' I don't necessarily want to be able to write all halting algorithms in the language (I don't think that such a language would exist) but I suspect that there are common threads in halting proofs that can be generalized to produce a language in which all algorithms are guaranteed to halt. There's also another way to tackle this problem - eliminate the need for theoretically infinite memory. Once you limit the amount of memory the machine is allowed, the number of states the machine is in is finite and countable, and therefore you can determine if the algorithm will halt (by not allowing the machine to move into a state it's been in before).

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• emacs23 pops up debugger way too frequently

  - by werner r.

  Since I've upgraded to Ubuntu lucid and emacs23, Emacs pops up the debugger in situations, where emacs22 does not. For example, when hitting C-c C-c in org-mode, emacs22 simply states can do nothing useful at this location, whereas in emacs23 the debugger shows up. Debugger entered--Lisp error: (error "C-c C-c can do nothing useful at this location") signal(error ("C-c C-c can do nothing useful at this location")) error("C-c C-c can do nothing useful at this location") org-ctrl-c-ctrl-c(nil) call-interactively(org-ctrl-c-ctrl-c nil nil) That only illustrates the pattern -- the behavior is not limited to org-mode. Occurring every 3 minutes, it really annoys me. How can I prevent it? I've already tried to stop this using debug-on-error and stack-trace-on-error: it didn't work.

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• Using PHP script to fill in XML

  - by Yaaqov

  Hi - we are all familiar with "embedding" PHP scripts in HTML pages to do tasks like displaying form results, but how can that be done in a way that displays XML? For example, if I wrote: <? xml version='1.0' ?> <Responses> <?php $body = $_GET['Body']; $fromPh = $_GET['From']; echo echo "<Msg>Your number is: $fromPh, and you typed: $body.</Msg>" ?> </Response> I get a message that states "parse error, unexpected T_STRING on line 1". Any help or tutorials would be appreciated.

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• How do I draw part of parabola using iText ? Or how do I create quadratic bezier curves from cubic b

  - by drasto

  I need to draw a shape whose boundaries are parts of parabola (that is quadratic bezier curves) using iText. I have found only method for drawing cubic bezier curves in PdfContentByte class. So how do I draw quadratic bezier curves using iText ? One way would be to use method for cubic bezier curves. Is it possible to draw quadratic bezier curves as a cubic bezier curves (with 2 control points). I gues it is but I cannot make up the formula. If somebody states the formula tu "translate" cubic bezier curves to quadratic that would solve the problem. Any other ways to draw quadratic bezier(parts of parabola) curves in iText (and filled shapes made of them) is also the solution. Thanks

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• Capture and display console output at the same time

  - by Patrick

  Hi, MSDN states that it is possible in .NET to capture the output of a process and display it in the console window at the same time. Normally when you set StartInfo.RedirectStandardOutput = true; the console window stays blank. As the MSDN site doesn't provide a sample for this I was wondering if anyone would have a sample or could point me to a sample? When a Process writes text to its standard stream, that text is normally displayed on the console. By redirecting the StandardOutput stream, you can manipulate or suppress the output of a process. For example, you can filter the text, format it differently, or write the output to both the console and a designated log file. MSDN This post is similar to http://stackoverflow.com/questions/786726/capture-standard-output-and-still-display-it-in-the-console-window by the way. But that post didn't end up with a working sample. Thanks a lot, Patrick

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• Django doctests in views.py

  - by Brian M. Hunt

  The Django documentation on tests states: For a given Django application, the test runner looks for doctests in two places: The models.py file. You can define module-level doctests and/or a doctest for individual models. It's common practice to put application-level doctests in the module docstring and model-level doctests in the model docstrings. A file called tests.py in the application directory -- i.e., the directory that holds models.py. This file is a hook for any and all doctests you want to write that aren't necessarily related to models. Out of curiosity I'd like to know why Django's testrunner is limited to the doctests in models.py, but more practically I'd like to know how one could expand the testrunner's doctests to include (for example) views.py and other modules when running manage.py test. I'd be grateful for any input. Thank you. Brian

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• Python Mersenne Twister implementation

  - by B Rivera

  I have Python 3.1.2 and I'm using Windows XP. Where can I see Python's implementation of the Mersenne Twister? In the Python docs it is stated that the Mersenne Twister was written in C and the Python History and License ( http://docs.python.org/py3k/license.html?highlight=mersenne%20twister ) states that "The _random module includes code based on a download from http://www.math.keio.ac.jp/matumoto/MT2002/emt19937ar.html." random.py imports _random which apparently has the Mersenne Twister implementation in it. I can't seem to locate _random. Any thoughts?

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• Google Maps - user to pinpoint a location

  - by JohnB

  Hi, Is it possible to allow users of my website to mark places on a map I display using Google Maps API? I need to then save that location coordinates to a db. I've been looking through the google maps API, I found that I can use the web service to do searches like this: http://maps.google.com/maps/geo?q=Maine,+United+States&output=json&oe=utf8\&sensor=false&key=my_key But I am not sure it's working on a house number level (which I need it to) and I'm not sure how to display a 'did you mean?' to the user when he misspells the address.. Anyone have an idea? Thanks,

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• CommandManager Executed Events don't fire for custom ICommands

  - by Andre Luus

  The WPF CommandManager allows you to do the following (pseudo-ish-code): <Button Name="SomeButton" Command="{Binding Path=ViewModelCommand}"/> And in the code-behind: private void InitCommandEvents() { CommandManager.AddExecutedEventHandler(this.SomeButton, SomeEventHandler); } The SomeEventHandler never gets called. To me this didn't seem like something very wrong to try and do, but if you consider what happens inside CommandManager.AddExecutedEventHandler, it makes sense why it doesn't. Add to that the fact that the documentation clearly states that the CommandManager only works with RoutedCommands. Nonetheless, this had me very frustrated for a while and led me to this question: What would you suggest is the best workaround for the fact that the CommandManager does not support custom ICommands? Especially if you want to add behavior around the execution of a command? For now, I fire the command manually in code behind from the button click event.

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• Experiences with "language converters"?

  - by Friedrich

  I have read a few articles mentioning converters from one language to another. I'm a bit more than skeptical about the use of such kind of tools. Does anyone know or have experiences let's say about Visual Basic to Java or vs converters? Just one example to pick http://www.tvobjects.com/products/products.html, claims to be the "world leader" or so in that aspect, However if read this: http://dev.mysql.com/tech-resources/articles/active-grid.html There the author states: "The consensus of MySQL users is that automated conversion tools for MS Access do not work. For example, tools that translate existing Access applications to Java often result in 80% complete solutions where finishing the last 20% of the work takes longer than starting from scratch." Well we know we need 80% of the time to implement the first 80% functionality and another 80% of the time for the other 20 %.... So has anyone tried such tools and found them to be worthwhile?

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• Can't set anchor tag to [disabled] in IE

  - by Alex

  Hi. I have the following css code. button.png is image where 3 button states are pasted vetrically, so i just move image in css. a.button { background-image: url(button.png); background-position: 0px 0px; width: 100px; height: 30px; display: block; background-repeat: no-repeat; text-indent: -9999px; } a:hover.button { background-position: -100px 0px; } a.button[disabled] { background-position: -200px 0px; cursor:default; } I put this in html <a href="#" class="button" disabled="disabled"></a> In Chrome all is ok. IE dont show disabled image.

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• Different NSTimeZone names being returned

  - by Michael Waterfall

  I've noticed that on some devices the NSTimeZone's name method for a particular timezone can return different values. When testing the Brisbane time zone, my device returns @"Australia/Brisbane" whereas another user's device returns "Etc/GMT-10". Both iPhone's are running 3.1.2. The Date and Time Programming Guide for Cocoa states that: timeZoneWithName: The name passed to this method may be in any of the formats understood by the system, for example EST, Etc/GMT-2, America/Argentina/Buenos_Aires, Europe/Monaco, or US/Pacific, as shown in the following code fragment. I'd just like to know what could determine which value is used? The device? The language?

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• Efficiently storing a list of prime numbers

  - by eSKay

  This article says: Every prime number can be expressed as 30k±1, 30k±7, 30k±11, or 30k±13 for some k. That means we can use eight bits per thirty numbers to store all the primes; a million primes can be compressed to 33,334 bytes "That means we can use eight bits per thirty numbers to store all the primes" This "eight bits per thirty numbers" would be for k, correct? But each k value will not necessarily take-up just one bit. Shouldn't it be eight k values instead? "a million primes can be compressed to 33,334 bytes" I am not sure how this is true. We need to indicate two things: VALUE of k (can be arbitrarily large) STATE from one of the eight states (-13,-11,-7,-1,1,7,11,13) I am not following how 33,334 bytes was arrived at, but I can say one thing: as the prime numbers become larger and larger in value, we will need more space to store the value of k. How, then can we fix it at 33,334 bytes?

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• LINQ query and lambda expressions

  - by user329269

  I'm trying to write a LINQ query and am having problems. I'm not sure if lambda expressions are the answer or not but I think they may be. I have two combo boxes on my form: "State" and "Color". I want to select Widgets from my database based on the values of these two dropdowns. My widgets can be in one of the following states: Not Started, In Production, In Finishing, In Inventory, Sold. Widgets can have any color in the 'color' table in the database. The 'state' combobox has selections "Not Sold," "In Production/Finishing", "Not Started," "In Production," "In Finishing," "In Inventory," "Sold." (I hope these are self-explanatory.) The 'color' dropdown has "All Colors," and a separate item for each color in the database. How can I create a LINQ query to select the widgets I want from the database based on the dropdowns?

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• WinDbg can't find mfc90 version 9.0.30729.4148 symbols on msdl.microsoft.com

  - by Simon Hofverberg

  I think the title states my problem fairly well. Where are those mfc symbols? Some background info: I have a crash dump that I want to analyze in WinDbg. My symbol path contains msdl.microsoft.com/download/symbols (and it says h t t p first but I'm a new user here so I'm not allowed to write that twice. The 9.0.30729.4148 version seems to be installed by some Windows update When a dump contains an earlier version of mfc90, it is located by WinDbg on the Microsoft symbol server with the same settings. When I use !sym noisy, the output for mfc90.dll contains: SYMSRV: http://msdl.microsoft.com/download/symbols/mfc90.dll/4A596D4939c000/mfc90.dll not found The same thing happens on two different computers Edit: See my comments below. The symbols are present on the server, but WinDbg can't get them.

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• Direct3D 11 effect files deprecated?

  - by Toji

  I've been playing around with Direct3D 11 a little bit lately and have been frustrated by the lack of documentation on the basics of the API (such as simple geometry rendering). One of the points of confusion brought on by the sparse documentation is the (apparent) move away from the use of effects for shaders. In D3D11 all of the effect (.fx) support has been removed from the D3DX libraries and buried away in a hard to find (sparsely documented, of course) shared source library. None of the included examples use it, preferring instead to compile HLSL files directly. All of this says to me that Microsoft is trying to get people to stop using the effect file format. Is that true? Is there any documentation of any kind that states that? I'm fine doing it either way, but for years now they've been promoting the .fx format so it seems odd that they would suddenly decide to drop it.

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