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• Invalid character in a Base-64 string

  - by swetha

  I am getting this error when I am validating the user with sql membership provider this.provider.ValidateUser(userName, password); the password i have used is "freetrial". I tried trimming the spaces but still no luck!!! and the call stack is as follows: [FormatException: Invalid character in a Base-64 string.] System.Convert.FromBase64String(String s) +0 System.Web.Security.MembershipProvider.EncodePassword(String pass, Int32 passwordFormat, String salt) +54 System.Web.Security.SqlMembershipProvider.CheckPassword(String username, String password, Boolean updateLastLoginActivityDate, Boolean failIfNotApproved, String& salt, Int32& passwordFormat) +169 System.Web.Security.SqlMembershipProvider.CheckPassword(String username, String password, Boolean updateLastLoginActivityDate, Boolean failIfNotApproved) +42 System.Web.Security.SqlMembershipProvider.ValidateUser(String username, String password) +78

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• WPF integrate Windows live authentication for windows health vault

  - by AnD

  Hi all, I'm just wondering if there's any way for WPF application integrated with windows live ID? and it's actually for windows health vault [www.healthvault.com] so health vault is using windows live id or open id to login into their system. and what i gonna do is, creating wpf application (instead of web application) for health vault, so all of the login form username pass and everything is handled inside the wpf application without showing/using any internet browser. so since this's quite new for me, i hope if there's somebody ever did this before especially for health vault system that run on standalone wpf app. alright, so that's it, thank you in advance!

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• Model-Controller cyclic reference/design problem

  - by jasamer

  I have a CoreData entity X, and controllers for this entity, XController. Now there's another entity, XGroup, containing a collection of X entities, and a XGroupController. Now the problem is that XGroupController needs to interact with XController, and it would be nice to just pass XGroupController a XGroup to observe, and then get the XControllers from the X entities. So the question is: is it a good idea to store a (weak, to avoid retain cycles) reference to a controller in an entity? It just feels a bit "wrong". Is there another design pattern for this?

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• Patterns for simulating optional "out" parameters in C#?

  - by Jesse McGrew

  I'm translating an API from C to C#, and one of the functions allocates a number of related objects, some of which are optional. The C version accepts several pointer parameters which are used to return integer handles to the objects, and the caller can pass NULL for some of the pointers to avoid allocating those objects: void initialize(int *mainObjPtr, int *subObjPtr, int *anotherSubObjPtr); initialize(&mainObj, &subObj, NULL); For the C# version, the obvious translation would use out parameters instead of pointers: public static void Initialize(out int mainObj, out int subObj, out int anotherSubObj); ... but this leaves no way to indicate which objects are unwanted. Are there any well-known examples of C# APIs doing something similar that I could imitate? If not, any suggestions?

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• Do condition variables still need a mutex if you're changing the checked value atomically?

  - by Joseph Garvin

  Here is the typical way to use a condition variable: // The reader(s) lock(some_mutex); if(protected_by_mutex_var != desired_value) some_condition.wait(some_mutex); unlock(some_mutex); // The writer lock(some_mutex); protected_by_mutex_var = desired_value; unlock(some_mutex); some_condition.notify_all(); But if protected_by_mutex_var is set atomically by say, a compare-and-swap instruction, does the mutex serve any purpose (other than that pthreads and other APIs require you to pass in a mutex)? Is it protecting state used to implement the condition? If not, is it safe then to do this?: // The writer protected_by_mutex_var = desired_value; some_condition.notify_all(); With the writer never directly interacting with the reader's mutex? If so, is it even necessary that different readers use the same mutex?

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• .NET template class instance - passing a variable data type

  - by FerretallicA

  As the title suggests, I'm tyring to pass a variable data type to a template class. Something like this: frmExample = New LookupForm(Of Models.MyClass) 'Works fine Dim SelectedType As Type = InstanceOfMyClass.GetType() 'Works fine frmExample = New LookupForm(Of SelectedType) 'Ba-bow! frmExample = New LookupForm(Of InstanceOfMyClass.GetType()) 'Ba-bow! LookupForm<Models.MyClass> frmExample; Type SelectedType = InstanceOfMyClass.GetType(); frmExample = new LookupForm<SelectedType.GetType()>(); //Ba-bow frmExample = new LookupForm<(Type)SelectedType>(); //Ba-bow I'm assuming it's something to do with the template being processed at compile time but even if I'm off the mark there, it wouldn't solve my problem anyway. I can't find any relevant information on using Reflection to instance template classes either. (How) can I create an instance of a dynamically typed repository at runtime?

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• std::deque: How do I get an iterator pointing to the element at a specified index?

  - by Ptah- Opener of the Mouth

  I have a std::deque, and I want to insert an element at a specified index (I'm aware that std::list would be better at this). The deque::insert() function takes an iterator to specify the location to insert. Given an index, how can I get an iterator pointing to that location, so that I can pass that iterator to insert()? For example: void insertThing ( deque<Thing> & things, Thing thing, size_t index ) { deque<Thing>::iterator it = /* what do I do here? */ things.insert ( it, thing ); } I'm sure this is a very basic question, and I apologize for it. It's been a long time since I've used the STL, and I don't see anything in std::deque's member list that obviously does what I want. Thanks.

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• mootools slideshow2

  - by ioannis

  hello everyone. i am using slideshow2 by Aeron Glemann in a website.Does in generate the thumbnails or do i have to provide them?the images iam showing are coming from a cloud, and are passed to the slideshow in an array.the thumbs exist in the cloud. how can i pass them in the array if the show cannot create them? i have used the replace parameter with regex but it shows as thumbnails the full image and nothing happens when i alter the css properties for the thumbnails. the images are displayed. here is the line for the show creation: var myShow = new Slideshow('show', eval(res.value), { controller: true, height: 350,overlap: false, resize: false, hu: '',replace:[/^\S+.(gif|jpg|jpeg|png)$/,'t$1'],thumbnails: true, width: 600}); the value object contains the images from the cloud in format shown below: ['xx.jpg','yy.png',....] thank you very much for your time.

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• Passing data between states PHP

  - by esryl

  So I am using Limonade PHP which has a RESTful design which emulates PUT, POST, DELETE routes for create, update, delete. I am trying to develop some form validation which is going well. The major problem I am facing though is how to return my filtered data (which has failed validation) back to repopulate the create or edit form. How would this be done? I currently have for creating a page: /admin/page/new -> GET function /admin/page -> POST function + validate + pass, update db + fail, add errors to flash, redirect to /admin/page/mew It all falls down as I do not know how to populate the /admin/page/new with the invalid, but filtered data.

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• Grails Testing hickups

  - by egervari

  I have two testing questions. Both are probably easily answered. The first is that I wrote this unit test in Grails: void testCount() { mockDomain(UserAccount) new UserAccount(firstName: "Ken").save() new UserAccount(firstName: "Bob").save() new UserAccount(firstName: "Dave").save() assertEquals(3, UserAccount.count()) } For some reason, I get 0 returned back. Did I forget to do something? The second question is for those who use IDEA. What should I be running - IDEA's junit tests, or grails targets? I have two options. Also, why does IDEA say that my tests pass and it provides a green light even though the test above actually fails? This will really drive me nuts if I have to check the test reports in html every time I run my tests..... Help?

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• Python encoding for pipe.communicate

  - by Brian M. Hunt

  I'm calling pipe.communicate from Python's subprocess module from Python 2.6. I get the following error from this code: from subprocess import Popen pipe = Popen(cwd) pipe.communicate( data ) For an arbitrary cwd, and where data that contains unicode (specifically 0xE9): Exec. exception: 'ascii' codec can't encode character u'\xe9' in position 507: ordinal not in range(128) Traceback (most recent call last): ... stdout, stderr = pipe.communicate( data ) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/subprocess.py", line 671, in communicate return self._communicate(input) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/subprocess.py", line 1177, in _communicate bytes_written = os.write(self.stdin.fileno(), chunk) This is happening, I presume, because pipe.communicate() is expecting ASCII encoded string, but data is unicode. Is this the problem I'm encountering, and i sthere a way to pass unicode to pipe.communicate()? Thank you for reading! Brian

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• Passing Boost uBLAS matrices to OpenGL shader

  - by AJM

  I'm writing an OpenGL program where I compute my own matrices and pass them to shaders. I want to use Boost's uBLAS library for the matrices, but I have little idea how to get a uBLAS matrix into OpenGL's shader uniform functions. matrix<GLfloat, column_major> projection(4, 4); // Fill matrix ... GLuint projectionU = glGetUniformLocation(shaderProgram, "projection"); glUniformMatrix4fv(projectionU, 1, 0, (GLfloat *)... Um ...); Trying to cast the matrix to a GLfloat pointer causes an invalid cast error on compile.

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• How to achieve a palette effect on iPhone using OpenGL

  - by Joe

  I'm porting a 2d retro game to iPhone that has the following properties: targets OpenGL ES 1.1 entire screen is filled with tiles (textured triangle strip tile textured using a single 256x256 RGBA texture image the texture is passed to OpenGL once at the start of the game only 4 displayed colours are used one of the displayed colours is black The original game flashed the screen when time starts to run out by toggling the black pixels to white using an indexed palette. What is the best (i.e. most efficient) way to achieve this in OpenGL ES 1.1? My thoughts so far: Generate an alternative texture with white instead of black pixels, and pass to OpenGL when the screen is flashing Render a white poly underneath the background and render the texture with alpha on to display it Try and render a poly on top with some blending that achieves the effect (not sure this is possible) I'm fairly new to OpenGL so I'm not sure what the performance drawbacks of each of these are, or if there's a better way of doing this.

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• Connecting two Windows XP with MSMQ

  - by NealWalters

  This question is a cross between a developer and a server setup question. I asked on Serverfault but no answer yet. As a developer, I need to setup a test to see how MSMQ works between two machines, and I'm unclear what to do. I will use C# or BizTalk to do the read/write to/from the queues. I have MSMQ installed on two Windows XP computers. Can I configure them to pass messages back and forth, or do I need an MSMQ server in the middle? If I need an MSMQ server, does the normal MSMQ with Win2003 able to act as that? And then, how do I connect my Windows XP to that Windows 2003 server? Is it a) On screen admin dialog in the MSMQ plug-in to MMC, b) a config file, c) Active Directory, d) something else? Thanks, Neal Walters

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• Rationale behind Python's preferred for syntax

  - by susmits

  What is the rationale behind the advocated use of the for i in xrange(...)-style looping constructs in Python? For simple integer looping, the difference in overheads is substantial. I conducted a simple test using two pieces of code: File idiomatic.py: #!/usr/bin/env python M = 10000 N = 10000 if __name__ == "__main__": x, y = 0, 0 for x in xrange(N): for y in xrange(M): pass File cstyle.py: #!/usr/bin/env python M = 10000 N = 10000 if __name__ == "__main__": x, y = 0, 0 while x < N: while y < M: y += 1 x += 1 Profiling results were as follows: bash-3.1$ time python cstyle.py real 0m0.109s user 0m0.015s sys 0m0.000s bash-3.1$ time python idiomatic.py real 0m4.492s user 0m0.000s sys 0m0.031s I can understand why the Pythonic version is slower -- I imagine it has a lot to do with calling xrange N times, perhaps this could be eliminated if there was a way to rewind a generator. However, with this deal of difference in execution time, why would one prefer to use the Pythonic version?

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• JDBC CallableStatement and Oracle SYS_REFCURSOR IN parameters?

  - by deebo

  Pretty much what it says in the title, how the hell is this supposed to be done? Basically i need to pass a null (empty?) ref cursor as an IN parameter to a stored procedure. /** spring's PreparedStatementSetter#setValues(...) */ public void setValues(PreparedStatement ps) throws SQLException { CallableStatement cs = (CallableStatement) ps; cs.setString(1,"constant"); //this is the IN param cs.setNull(2, OracleTypes.CURSOR); //this is the OUT param cs.registerOutParameter(3, OracleTypes.CURSOR); } And this fails with: caused by: java.sql.SQLException: Unsupported feature: sqlType=-10 at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112) at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146) at oracle.jdbc.driver.OraclePreparedStatement.setNullCritical(OraclePreparedStatement.java:4399) at oracle.jdbc.driver.OraclePreparedStatement.setNullInternal(OraclePreparedStatement.java:4161) at oracle.jdbc.driver.OracleCallableStatement.setNull(OracleCallableStatement.java:4472) I'm at a loss here, tried several different ways to do this, but I couldn't find any examples about this and have no idea how to do it properly.

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• Abstract out repeated code

  - by CookieMonster

  The code in this event is repeated exactly in two other event handlers. How do I put the repeated code into a method and call that method from the event handlers so I only have to maintain it in one place? I'm not sure how to pass the event args to the calling method. protected void gvDocAssoc_RowDataBound(object sender, GridViewRowEventArgs e) { if (e.Row.RowType == DataControlRowType.DataRow) { if ((Convert.ToString(DataBinder.Eval(e.Row.DataItem, "DETAIL_TYPE_DESC")) == "Transcript") && (Convert.ToString(DataBinder.Eval(e.Row.DataItem, "INSTITUTION_CODE")) == "")) { e.Row.BackColor = System.Drawing.Color.Red; } if ((Convert.ToString(DataBinder.Eval(e.Row.DataItem, "DETAIL_TYPE_DESC")) == "Certified Diploma") && (Convert.ToString(DataBinder.Eval(e.Row.DataItem, "INSTITUTION_CODE")) == "")) { e.Row.BackColor = System.Drawing.Color.Red; } if ((Convert.ToString(DataBinder.Eval(e.Row.DataItem, "DOC_TYPE_DESC")) == "Post Graduate conditions") && (Convert.ToString(DataBinder.Eval(e.Row.DataItem, "INSTITUTION_CODE")) == "")) { e.Row.BackColor = System.Drawing.Color.Red; } } }

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• rails arguments to after_save observer

  - by ash34

  Hi, I want users to enter a comma-delimited list of logins on the form, to be notified by email when a new comment/post is created. I don't want to store this list in the database so I would use a form_tag_helper 'text_area_tag' instead of a form helper text_field. I have an 'after_save' observer which should send an email when the comment/post is created. As far as I am aware, the after_save event only takes the model object as the argument, so how do I pass this non model backed list of logins to the observer to be passed on to the Mailer method that uses them in the cc list. thanks

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• Creating Instance of a DataContract Class on the client side

  - by hgulyan

  I'm not sure, if it's right to do this, but I'd like to ask this question again ( http://stackoverflow.com/questions/2498644/creating-instance-of-a-service-side-datacontract-class-on-client-side-in-wcf ). The main question is - why there's difference between creating instance on the client side and creating it on the server side? Why there're some properties, that lose their values when you create them on the client side and pass it to service's functions? What could be the issue? Any version will be appreciated. I've written about my problem in the update part of the question in that link. Thank You. p.s. If this is against the rules, I'll delete it.

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• What is the correct usage of blueprint-typography-body([$font-size])?

  - by Alexis Abril

  Recent convert to RoR and I've been using Compass w/ Blueprint to dip into the proverbial pool. Compass has been fantastic, but I've come across something strange within the Typography library. The blueprint-typography-body mixin contains the following: =blueprint-typography-body($font-size: $blueprint-font-size) line-height: 1.5 +normal-text font-size: 100% * $font-size / 16px My question revolves around "font-size." I'm a bit lost, as I would expect to pass in a font size and have that size reflected upon page load. However, in this scenario the formula seems to dictate a percentage against the default font. ie: +blueprint-typography-body(10px) //produces 7.5px off of the default font size of 12px from what I can tell. In essence, I'm curious if there is a standard to setting font size within Compass other than explicitly declaring "font-size: 10px". Note: The reason I'm leaning towards Blueprint/Compass font stylings is due to the standardization of line-heights, fonts and colors.

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• Using javascript to open a popup window

  - by newName

  I would like to open a popup window using javascript in my c#.net app. This is the code in the body tag in my webform <script language=javascript> function openWindow(strEmail) { window.open('CheckEmail.aspx?email=' + strEmail + , 'Check Email','left=100,top=100,toolbar=no,scrollbars=yes,width=680,height=350'); return false; } </script> this is my code in the Page_Load section this.btnCheck.Attributes.Add("onclick", "return openWindow(" + txtEmail.Text + ");"); right now I'm trying to pass the string from my textbox "txtEmail" so in my popup window i can get the request.querystring but Im a little unsure of how the syntax is.

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• How to get z-index to play nice with the jQuery plugin Cycle

  - by alex

  Take a look at the bottom right example on the jQuery Cycle Advanced Demos page. Notice how when it loops the gallery, the next image goes beneath the last, as opposed to others where the next image always covers the previous one? Well, at least in Firefox 3.6.3. I'm developing a custom animation with jQuery cycle that has the same problem. When it loops, the next image goes under instead of over. This is my config object I pass to cycle(). { fx: 'custom', timeout: 5000, easing: 'easeInOutQuad', pause: 1, cssFirst: { zIndex: 0 }, cssBefore: { display: 'block', top: -500, opacity: 1, zIndex: 1 }, animIn: { top: 0, opacity: 1 }, animOut: { opacity: .2 }, cssAfter: { display: 'none', opacity: .2, zIndex: 0 }, delay: -1000 } Basically the animation is the same as the cover fx, except the previous image should fade away as the next one comes down on top. Is there any way to get the next slide when it loops to cover the previous one? Thanks

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• upload image during registration in asp.net

  - by Vikrant

  I am developing a student registration form in asp.net. there are two tables viz std_registration and gallery(having pic_id and pic_url). During registration, before the click of submit button i want to retrieve pic_id from gallery table and then pass it to the insert query of registration table. image upload is an optional part. if no image is uploaded i want a default image to get uploaded. pls help me on this. thanx.

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• Why does sorl.thumbnail ImageField fail in the admin?

  - by Mark0978

  I have code that looks like this: from sorl.thumbnail import ImageField class Gallery(models.Model): pass class GalleryImage(models.Model): image = ImageField(upload_to='galleries') In the admin: class GalleryImageInline(admin.TabularInline): model = GalleryImage class GalleryAdmin(admin.ModelAdmin): inlines = (GalleryImageInline,) If I use the sorl.thumbnail as above, it is impossible to add images in the admin. I get the validation error Enter a list of values. If I replace the sorl.thumbnail.ImageField with a plain django ImageField, everything works. If I want sorl.thumbnail to clean up the cache thumbnails, I need to use it in the model, but if I use it in the model, I can't seem to add any images to need thumbnails. Anyone else found and fixed this problem yet?

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• Perl XML::Simple XMLout function

  - by Jeremey

  I pass in the following XML to XMLin: <root foo="bar" foo2="bar2"> <pizzas> <pizza>Pepperoni</pizza> </pizzas> </root> I then edit part of the root element via hash array. I don't care about the pizza, but i do need that XML to come back out exactly as it was. However, I get the following from XMLout: <root foo="bar" foo2="bar2"> <pizzas pizza="Pepperoni"</pizzas> </root> Thoughts?

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