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• improve my jquery validation plugin code

  - by Jared

  Hi All Just hoping soemone can help me to write better code than I can come up with on my own. I am using the jquery validation plugin. I have some fields that are mandatory ONLY if certain options are chosen. The below code works fine. But the thing is, is that that my list of 'OR's is much longer than I've put here. and it needs to be applied not just to 'directorsName' but a whole long list of inputs, selects etc. My question is.. how can I wrap up the code contained inside the RETURN? (so I dont have to keep repeating my 'OR's. I'm guessign I need a function but I'm unsure of the syntax) $("#myForm").validate({ rules: { directorsName : { required: function(element) { return ( $('#account_for').val() == "Joint" || $('#directors_number').val() == "2" || $('#directors_number').val() == "3" ); } } } }); Thanks in advance

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• The best way to ensure only 1 copy of bash script is running?

  - by depesz

  What is the simplest/best way to ensure only 1 copy of given script is running - assuming it's bash on linux? At the moment I'm doing: ps -C script.name.sh > /dev/null 2>&1 || ./script.name.sh but it has several issues: it puts the check outside of script it doesn't let me run the same script from separate accounts - which I would like sometimes. -C checks only first 14 characters of process name Of course I can write my own pidfile handling, but I sense that there should be some simple way to do it.

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• copy C'tor with operator= | C++

  - by user2266935

  I've got this code here: class DerivedClass : public BaseClass { SomeClass* a1; Someclass* a2; public: //constructors go here ~DerivedClass() { delete a1; delete a2;} // other functions go here .... }; My first question is as follows: Can I write an "operator=" to "DerivedClass" ? (if your answer is yes, could you show me how?) My second question is: If the answer to the above is yes, could you show me how to make an "copy c'tor" using the "operator=" that you wrote beforehand (if that is even possible)? Your help would be much appreciated !

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• Big-O for Eight Year Olds?

  - by Jason Baker

  I'm asking more about what this means to my code. I understand the concepts mathematically, I just have a hard time wrapping my head around what they mean conceptually. For example, if one were to perform an O(1) operation on a data structure, I understand that the amount of operations it has to perform won't grow because there are more items. And an O(n) operation would mean that you would perform a set of operations on each element. Could somebody fill in the blanks here? Like what exactly would an O(n^2) operation do? And what the heck does it mean if an operation is O(n log(n))? And does somebody have to smoke crack to write an O(x!)?

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• Rails test across multiple environments

  - by DSimon

  Is there some way to change Rails environments mid-way through a test? Or, alternately, what would be the right way to set up a test suite that can start up Rails in one environment, run the first half of my test in it, then restart Rails in another environment to finish the test? The two environments have separate databases. Some necessary context: I'm writing a Rails plugin that allows multiple installations of a Rails app to communicate with each other with user assistance, so that a user without Internet access can still use the app. They'll run a local version of an app, and upload their work to the online app by saving a file to a thumbdrive and taking it to an Internet cafe. The plugin adds two special environments to Rails: "offline-production" and "offline-test". I want to write functional tests that involve both the "test" and "offline-test" environments, to represent the main online version of the app and the local offline version of the app respectively.

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• Generating code at compile-time using scripts

  - by Manux

  Hello, I would ideally like to be able to add (very repetitive) C/C++ code to my actual code, but at compile time, code which would come from say, the stdout of a python script, the same way one does with macros. For example, let's say I want to have functions that depend on the public attributes of a given class, being able to just write the following in my C++ code would be a blessing: generate_boring_functions(FooBarClass,"FooBarClass.cpp") Is that feasible using conventional means? Or must I hack with Makefiles and temporary source files? Thanks.

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• How do I count the number of bytes read by TextReader.ReadLine()?

  - by Steve Guidi

  I am parsing a very large file of records (one per line, each of varying length), and I'd like to keep track of the number of bytes I've read in the file so that I may recover in the event of a failure. I wrote the following: string record = myTextReader.ReadLine(); bytesRead += record.Length; ParseRecord(record); However this doesn't work since ReadLine() strips any CR/LF characters in the line. Furthermore, a line may be terminated by either CR, LF, or CRLF characters, which means I can't just add 1 to bytesRead. Is there an easy way to get the actual line length, or do I write my own ReadLine() method in terms of the granular Read() operations?

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• What's the equivalent in C# of this VB code on an Outlook form?

  - by wes

  Basically, how do I link an Outlook form and a C# back end? In VB you can write on the form Sub ButtonName_Click() Dim Recipients With Item.GetInspector.ModifiedFormPages("Message") Set Recipients = .Controls("To") End With End Sub which will fire whenever the button named "ButtonName" on the form is clicked and will set the variable Recipients to a string of whatever is in the To text box. Now I have a custom form, and I have a VS C# Outlook Add-in, and they're two separate things. I've got an event handler that can catch MailItem objects, but I don't know how to handle custom form button clicks or even how to access elements on the form. EDIT - Just to clarify, the custom form was created in Outlook and then its .ofs was imported into VS. Both Outlook and VS are 2010.

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• How Iostream file is located in computer by c++ code during execution

  - by user3702024

  i want to know that in a c++ code during execution how iostream file is founded. we write #include in c++ program and i know about #include which is a preprocessor directive to load files and is a file name but i don't know that how that file is located. i have some questions in my mind... Is Standard library present in compiler which we are using? Is that file is present in standard library or in our computer? Can we give directory path to locate the file through c++ code if yes then how?

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• Variable function name Javascript.

  - by Vladimir

  I'm sorting array: myArray.sort(comparators.some_comparator); and I have several comparator to choose from: comparators = { asc_firstname_comparator : function(o1, o2){ ... } desc_firstname_comparator : function(o1, o2){ ... } etc... } I want to write function which returns certain comparator depending on input data. It should figure out comparator from string inputs, something like this: function chooseComparator(field, order){ return "comparators."+order+"_"+field+"_comparator"; } So is it possible to pass only function name string to sort() method or I'll need to pass reference to correct comparator somehow?

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• Does Qt support virtual pure slots ?

  - by ereOn

  Hi, My GUI project in Qt has a lot of "configuration pages" classes which all inherit directly from QWidget. Recently, I realized that all these classes share 2 commons slots (loadSettings() and saveSettings()). Regarding this, I have two questions: Does it make sense to write a intermediate base abstract class (lets name it BaseConfigurationPage) with these two slots as virtual pure methods ? (Every possible configuration page will always have these two methods, so I would say "yes") Before I do the heavy change in my code (if I have to) : does Qt support virtual pure slots ? Is there anything I should be aware of ? Here is a code example describing everything: class BaseConfigurationPage : public QWidget { // Some constructor and other methods, irrelevant here. public slots: virtual void loadSettings() = 0; virtual void saveSettings() = 0; }; class GeneralConfigurationPage : public BaseConfigurationPage { // Some constructor and other methods, irrelevant here. public slots: void loadSettings(); void saveSettings(); };

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• Process.WaitForExit not triggering with __debugbreak

  - by Cypher2100

  I'm trying to write a program to test student code against a good implementation. I have a C++ console app that will run one test at a time determined by the command line args and a C# .net forms app that calls the c++ app once for each test. The goal is to be able to detect not just pass/fail for each test, but also "infinite" (5secs) loop and exceptions (their code dying for whatever reason). The problem is that not all errors kill the C++ app. If they corrupt the heap the system calls __debugbreak which pops up a window saying Debug Error! HEAP CORRUPTION DETECTED... My C# app is using Process.WaitForExit(5000) to wait, but this error doesn't count as an exit, so I see a timeout. So my question is, how can I either get the C# app to detect that this is an error OR how can I get the C++ app to die when this error occurs rather than giving a dialog box and asking if I want to debug?

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• C# - A good library to fake Time.Now?

  - by Amokrane

  Hi, In order to Unit-Test a feature, I need to fake DateTime.Now. Something like: SupposeNowIs(new DateTime(..)); I can either use a third library that does it, or write my own little class. What do you recommand? Do you know any good library for this purpose? How would you fake time in C#? By changing DateTime.Now? (I suppose it's read only?). Thank you!

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• How do I remotely obtain a system's network shares and connections?

  - by Mick

  I'm looking for a way to obtain information similar to the following console applications, remotely: net use net share netstat -ano However, I need to be able to do this without running a 3rd party application on the system. This effectively rules out using psexec to execute the command remotely, because psexec would then be installed as a service. I should add that I have administrative credentials on the remote system. I've considered using WMI's remote execution ability, but that requires me to write output to a file and then retrieve it. It's possible, but I'd like to know if anyone has a better way. I am using Delphi 2010.

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• Change Preference Item Summary Text Color in Android 4

  - by AntounG

  I have the below sample of preference items <CheckBoxPreference android:key="chkSound" android:summary="Sound is Off" android:title="Sound" /> I use a theme in the res/values to change the Summary text color <style name="ThemeDarkText"> <item name="android:textColor">#000000</item> </style> And in the code I write this line setTheme(R.style.ThemeDarkText); Its working fine in Android 2.1 but when I tried to run it on a different os (ex Android 4.0) It didn't change the summary text color just the title color only..!! Any help?

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• How to document a Symfony based REST API (similar to enunciate's documentation capabilities)

  - by Dominic

  If I have a REST based service written in the Symfony [symfony-project.org] framework (i.e. PHP), is there any decent tools/frameworks out there that will parse my code and generate API documentation? The Java based framework enunciate has documentation capabilities similar to what I need, you can view an example of this here: http://enunciate.codehaus.org/wannabecool/step1/index.html. I understand the premise of REST based services are supposed to be self evident, however I was after something that would generate this documentation for me without the need to manually write up all my endpoints, supported formats, sample output etc. Thanks

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• Starting a browser from a textbox via Intent - Is http:// required?

  - by VitalyB

  Hi, I have the following code: /** Open a browser on the URL specified in the text box */ private void openBrowser() { Uri uri = Uri.parse(urlText.getText().toString()); Intent intent = new Intent(Intent.ACTION_VIEW, uri); startActivity(intent); } When I input "http://www.google.com" to the textbox, it works fine. However, when I try something like "www.google.com" it crashes with: No Activity found to handle Intent { act=android.intent.action.VIEW dat=www.google.com } Am I using Uri wrong? Is there a way to extract full address from it? Or am I supposed to write code that adds http manually? e.g, if not starts with http://, add http://. Thanks!

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• Log4net rollingfile appender skipping every other day in asp.net mvc app

  - by tasty_spider_men

  Hi, I've set up some log4net logging on an asp.net mvc application i've had running for a little over a month now. I've set up rolling file (and smtp) appender on it. The application is hit several thousand times a day - alot of actions are logged. On top of these a number of batch jobs are run as part of the application that also write to the log. Now - as i've been occupied with other work, i've not attended to this application much assuming things to be working based on my test setup. Unfortunately i discover that the rolling file appender on my production server seems to be skipping every other day. Ie i have logs : 10/4/2010, 10/4/2010.1, 10/4/2010.2, 12/4/2010, 12/4/2010.1 , 14/4/2010, 14/4/2010.1 etc. Any idea what could be causing this? It is absolutely impossible that there has no action on these odd days for the lifetime of the application. Cheers

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• How to copy files from local machine to server using SSH file transfer protocol?

  - by morpheous

  I have an Ubuntu 9.10 desktop machine which I use locally. I am setting up a server on a hosting provider. The server will run a very minimal version of Ubuntu server LTS (only LAMP and email server no GUI). I want to write a script (scheduled as a cron job) that will allow me to upload local files onto the server. I want to use [SFTP][1], for security reasons. I am new to shell scripting - but I guess shell scripting is the way to do this (unless I am mistaken). Can anyone provide me with the initial pointers on how to go about writing such a script, in order to SECURELY upload local files to the server? Ideally, I would like to compress the files before the transfer (to save on bandwidth) [1]: http://SSH file transfer protocol

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• .NET Database application guidance.

  - by Wally

  Hello, I'm stumbling in the data wilderness and feel very lost, so i am asking for help. I have done some database apps in VS (C#) winforms for some time, wpf lately. These are small to medium apps (embedded dbs, a bit of sql server), like a restaurants, cash registers and similar. (15-20 tables) Until now, i have done all my datasets by drag and drop in Visual Studio designer. I spent weeks on web trying to find some complete solution how to write complete solution with typed datasets by hand from scratch (DAL, B.Objects) in hope to learn some architecture patterns along the way, but without success. So, finally question. Can someone recommend me what to learn for this type of applications, maybe move away from datasets , use some ORM ( maybe overkill, i dont know). Point me in some direction please.

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• How to define a custom iterator in C++

  - by Robert Martin

  I've seen a number of posts on SO about how to define custom iterators, but nothing that seems to exactly answers my question, which is... How do I create an iterator that hides a nested for loop? For instance, I have a class Foo, inside of the Foo is a Bar, and inside of the Bar is a string. I could write for (const Foo& foo : foo_set) for (const Bar& bar : foo.bar_set) if (bar.my_string != "baz") cout << bar.my_string << endl; but instead I want to be able to do something like: for (const string& good : foo_set) cout << good << endl; How do I do something like this?

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• Considering HorizontalAlignment and VerticalAlignment while creating a custom panel

  - by sudarsanyes

  I am trying to create a custom panel in wpf. Here the doubts I have, How do I consider the HorizontalAlignment and VerticalAlignment factors while placing the items within my panel. Should I check for these flags in my ArrangeOverride method ?? Consider that I want to write a WrapPanel clone. If the panel's width is set to "Auto", how do I get the actual width of the panel to arrange my child items. I always get the ActualWidth/ActualHeight as 0. Am I missing something??? Please help.

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• Does MultiThreading in Java takes much time for task completion?

  - by Geeta

  I have to search for a string in 10 large size files (in zip format 70 MB) and have to print the lines with the search string to corresponding 10 output files.(i.e. file 1 output should be in output_file1...file2--- output_file2). The same program takes 15 mins for a single file. But if use 10 threads to read 10 files and to write in 10 different files it should complete in 15 mins but its taking 40 mins. How can I solve this. Or multithreading will take this much time only?

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• [Android] GPS can't run inside TimerTask

  - by user568553

  Hi, I am trying to write an android app that acquires a GPS signal at a fix time interval, for example every 1 minute. Since the requestLocationUpdate function does not exactly implement that, I tried to use task to accomplished it. public class getGPS extends TimerTask{ public void run(){ System.out.println("Running a GPS task"); locHandler = new locationUpdateHandler(); myManager.requestLocationUpdates(provider, 60000, 0, locHandler); } } public void LoadCoords(){ Timer timer = new Timer(); timer.scheduleAtFixedRate(new getGPS(), 0, 60000); } However, from what I've seen, requestLocationUpdates would run fine if I put it inside LoadCoords(), but would not run if I put it inside the TimerTask (ie no green icon on the task bar to show that GPS is looking for a fix). Can anyone please suggest an alternative approach or pseudo-code, or correct my mistake if there is one ? Thank you in advance.

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• Does JavaScript have an equivalent to Perl's DESTROY method?

  - by Eric Strom

  Is there any method that is called or event that is dispatched right before an Element is cleaned up by the JavaScript garbage collector? In Perl I would write: package MyObj; sub new {bless {}} sub DESTROY {print "cleaning up @_\n"} and then later: { my $obj = MyObj->new; # do something with obj } # scope ends, and assuming there are no external references to $obj, # the DESTROY method will be called before the object's memory is freed My target platform is Firefox (and I have no need to support other browsers), so if there is only a Firefox specific way of doing this, that is fine. And a little background: I am writing the Perl module XUL::Gui which serves as a bridge between Perl and Firefox, and I am currently working on plugging a few memory leaks related to DOM Elements sticking around forever, even after they are gone and no more references remain on the Perl side. So I am looking for ways to either figure out when JavaScript Elements will be destroyed, or a way to force JavaScript to cleanup an object.

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