john tyler - Page 99 - Developer IT

jquery fadeout, load, fadein

- by John

Hi, I am using JQuery and what I want to happen is. Div fades out using the fadeOut command. It then loads content from a url using the load command. Then once content loaded it fades back in using the fadeIn command. The code I have is: $("#myDiv").fadeOut().load('www.someurl.com').fadeIn() However this does not work. It kind of flashes then loads out then loads in. I think the problem is that the fading is happening before the load is complete. What should I do Thanks

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Calculating a Sample Covariance Matrix for Groups with plyr

- by John A. Ramey

I'm going to use the sample code from http://gettinggeneticsdone.blogspot.com/2009/11/split-apply-and-combine-in-r-using-plyr.html for this example. So, first, let's copy their example data: mydata=data.frame(X1=rnorm(30), X2=rnorm(30,5,2), SNP1=c(rep("AA",10), rep("Aa",10), rep("aa",10)), SNP2=c(rep("BB",10), rep("Bb",10), rep("bb",10))) I am going to ignore SNP2 in this example and just pretend the values in SNP1 denote group membership. So then, I may want some summary statistics about each group in SNP1: "AA", "Aa", "aa". Then if I want to calculate the means for each variable, it makes sense (modifying their code slightly) to use: > ddply(mydata, c("SNP1"), function(df) data.frame(meanX1=mean(df$X1), meanX2=mean(df$X2))) SNP1 meanX1 meanX2 1 aa 0.05178028 4.812302 2 Aa 0.30586206 4.820739 3 AA -0.26862500 4.856006 But what if I want the sample covariance matrix for each group? Ideally, I would like a 3D array, where the I have the covariance matrix for each group, and the third dimension denotes the corresponding group. I tried a modified version of the previous code and got the following results that have convinced me that I'm doing something wrong. > daply(mydata, c("SNP1"), function(df) cov(cbind(df$X1, df$X2))) , , = 1 SNP1 1 2 aa 1.4961210 -0.9496134 Aa 0.8833190 -0.1640711 AA 0.9942357 -0.9955837 , , = 2 SNP1 1 2 aa -0.9496134 2.881515 Aa -0.1640711 2.466105 AA -0.9955837 4.938320 I was thinking that the dim() of the 3rd dimension would be 3, but instead, it is 2. Really this is a sliced up version of the covariance matrix for each group. If we manually compute the sample covariance matrix for aa, we get: [,1] [,2] [1,] 1.4961210 -0.9496134 [2,] -0.9496134 2.8815146 Using plyr, the following gives me what I want in list() form: > dlply(mydata, c("SNP1"), function(df) cov(cbind(df$X1, df$X2))) $aa [,1] [,2] [1,] 1.4961210 -0.9496134 [2,] -0.9496134 2.8815146 $Aa [,1] [,2] [1,] 0.8833190 -0.1640711 [2,] -0.1640711 2.4661046 $AA [,1] [,2] [1,] 0.9942357 -0.9955837 [2,] -0.9955837 4.9383196 attr(,"split_type") [1] "data.frame" attr(,"split_labels") SNP1 1 aa 2 Aa 3 AA But like I said earlier, I would really like this in a 3D array. Any thoughts on where I went wrong with daply() or suggestions? Of course, I could typecast the list from dlply() to a 3D array, but I'd rather not do this because I will be repeating this process many times in a simulation. As a side note, I found one method (http://www.mail-archive.com/[email protected]/msg86328.html) that provides the sample covariance matrix for each group, but the outputted object is bloated. Thanks in advance.

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Is info still encrypted if I use a <form action="https"> from a regular http page?

- by John

Say I'm at the url http://mysite.com/form.html. When viewing source, I see <form method="post" action="https://mysite.com/process"> <input type="text" name="user" value="information"> <input type="submit"> </form> If I hit the submit button, will the form information be encrypted when it's sent to the process page/controller?

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php preg_replace with php code

- by john

I have a function that finds a regex thingy, then replaces with php code. I want to have it replace the found regex with php code on the screen, like have it echo out ". except when it echos that in the source, it shows all the

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How to set width of textbox to be same as MaxLength in ASP.NET

- by John Galt

Is there a way I can limit the width of a textbox to be equal to the MaxLength property? In my case right now, the textbox control is placed in a table cell as in this snippet: <td class=TDSmallerBold style="width:90%"> <asp:textbox id="txtTitle" runat="server" CausesValidation="true" Text="Type a title here..be concise but descriptive. Include price." ToolTip="Describe the item with a short pithy title (most important keywords first). Include the price. The title you provide here will be the primary text found by search engines that index Zipeee content." MaxLength="60" Width="100%"> </asp:textbox> (I know I should not use HTML tables to control layout..another subject for sure) but is there a way to constrain the actual width to the max number of characters allowed in the typed box?

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Spatial domain to frequency domain

- by John Elway

I know about Fourier Transforms, but I don't know how to apply it here, and I think that is over the top. I gave my ideas of the responses, but I really don't know what I'm looking for... Supposed that you form a low-pass spatial filter h(x,y) that averages all the eight immediate neighbors of a pixel (x,y) but excludes itself. a. Find the equivalent frequency domain filter H(u,v): My answer is to (a): 1/8*H(u-1, v-1) + 1/8*H(u-1, v) + 1/8*H(u-1, v+1) + 1/8*H(u, v-1) + 0 + 1/8*H(u, v+1) + 1/8*H(u+1, v-1) + 1/8*H(u+1, v) + 1/8*H(u-1, v-1) is this the frequency domain? b. Show that your result is again a low-pass filter. does this have to do with the coefficients being positive?

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Should I use 'border: none' or 'border: 0'?

- by John Himmelman

Which of the two methods conforms to W3C standards? Do they both behave as expected across browsers? border: none; border: 0;

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jquery load links not clickable

- by john morris

ok i am loading a separate page with links in it, into a page named index.php. it loads fine, but when i click one of the links inside the loaded content, nothing happens. they dont act as links. but if i do a alert('hi'); after the load('page.html'); then it will work. any ideas on getting this to work without alerting something after it loads? oh also i cant use a callback, unless there is a way to update the get variable because the page loading, has a $_GET variable, and the links inside the loaded page are supposed to update the $_GET variable. anyways is there a way to make the links clickable after loading the page?

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Renaming ICSharpCode.SharpZipLib.dll

- by John B.

Hi, well I am having a problem renaming the ICSharpCode.SharpZipLib.dll file to anythig else. I am trying to shorten the file name. I reference the assembly in the project, but when the program reaches the statements where I use the library. It spawns an error that it could not find the assembly or file 'ICSharpCode.SharpZipLib'. When I change the file name back to ICSharpCode.SharpZipLib.dll the application works noramally. So, is there any way to change the file name. Also, am I allowed to change it without violating the license (I am going to use it in a commercial application). Thanks.

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What do I need to do to make sure my app launches as Admin?

- by John Gietzen

I'm writing an app that allows you to script the buttons from a wiimote into actions on your PC. It currently supports all of the features of the main remote control, except for the speaker. Now, I'm running in to trouble when I run it on Vista with UAC turned on. Any time a UAC'd window has focus, my app fails to move the mouse successfully. For instance, when an installer is run, I have to navigate it with the keyboard. Will running the app as administrator solve my problem? (At one point in time, I was able to successfully move the mouse over a UAC-password-entry box) How do I build a manifest that will tell windows to "run as administrator"? How do I embed this manifest into my app, if I'm strongly naming my assembly? How do I sign my application with an Authenticode cert? EDIT: Ok, so after some more extensive research, I have found: http://msdn.microsoft.com/en-us/library/bb756929.aspx <requestedExecutionLevel level="asInvoker|highestAvailable|requireAdministrator" uiAccess="true|false"/> However, the article says: Applications with the uiAccess flag set to true must be Authenticode signed to start properly. In addition, the application must reside in a protected location in the file system. \Program Files\ and \windows\system32\ are currently the two allowable protected locations. I have edited the question to reflect the new developments.

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Under what circumstances would a LINQ-to-SQL Entity "lose" a changed field?

- by John Rudy

I'm going nuts over what should be a very simple situation. In an ASP.NET MVC 2 app (not that I think this matters), I have an edit action which takes a very small entity and makes a few changes. The key portion (outside of error handling/security) looks like this: Todo t = Repository.GetTodoByID(todoID); UpdateModel(t); Repository.Save(); Todo is the very simple, small entity with the following fields: ID (primary key), FolderID (foreign key), PercentComplete, TodoText, IsDeleted and SaleEffortID (foreign key). Each of these obviously corresponds to a field in the database. When UpdateModel(t) is called, t does get correctly updated for all fields which have changed. When Repository.Save() is called, by the time the SQL is written out, FolderID reverts back to its original value. The complete code to Repository.Save(): public void Save() { myDataContext.SubmitChanges(); } myDataContext is an instance of the DataContext class created by the LINQ-to-SQL designer. Nothing custom has been done to this aside from adding some common interfaces to some of the entities. I've validated that the FolderID is getting lost before the call to Repository.Save() by logging out the generated SQL: UPDATE [Todo].[TD_TODO] SET [TD_PercentComplete] = @p4, [TD_TodoText] = @p5, [TD_IsDeleted] = @p6 WHERE ([TD_ID] = @p0) AND ([TD_TDF_ID] = @p1) AND /* Folder ID */ ([TD_PercentComplete] = @p2) AND ([TD_TodoText] = @p3) AND (NOT ([TD_IsDeleted] = 1)) AND ([TD_SE_ID] IS NULL) /* SaleEffort ID */ -- @p0: Input BigInt (Size = -1; Prec = 0; Scale = 0) [5] -- @p1: Input BigInt (Size = -1; Prec = 0; Scale = 0) [1] /* this SHOULD be 4 and in the update list */ -- @p2: Input TinyInt (Size = -1; Prec = 0; Scale = 0) [90] -- @p3: Input NVarChar (Size = 4000; Prec = 0; Scale = 0) [changing text] -- @p4: Input TinyInt (Size = -1; Prec = 0; Scale = 0) [0] -- @p5: Input NVarChar (Size = 4000; Prec = 0; Scale = 0) [changing text foo] -- @p6: Input Bit (Size = -1; Prec = 0; Scale = 0) [True] -- Context: SqlProvider(Sql2005) Model: AttributedMetaModel Build: 4.0.30319.1 So somewhere between UpdateModel(t) (where I've validated in the debugger that FolderID updated) and the output of this SQL, the FolderID reverts. The other fields all save. (Well, OK, I haven't validated SaleEffortID yet, because that subsystem isn't really ready yet, but everything else saves.) I've exhausted my own means of research on this: Does anyone know of conditions which would cause a partial entity reset (EG, something to do with long foreign keys?), and/or how to work around this?

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Setup Turtoise SVN+SubWeaver for existing dreamweaver site?

- by John Isaacks

I installed both Turtoise SVN and SubWeaver, I now have a SubWeaver drop down menu on the top of dreamweaver. I read a lot of the help files which basically explains how the system works and explains Copy-Modify-Merge. I am trying to set this up for my already existing dreamweaver site though, I am not finding information on how to do that. Can anyone explain this to me? Thanks!

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PHP Classes Extend

- by John

I have two classes that work seperate from another, but they extend the same class. Is it possible to have them work the same instance of the extended class. I'm wanting the constructor of the extended class to run only once. I know this isn't right but something like this: <?php $oApp = new app; class a extends $oApp {} class b extends $oApp {}

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jquery: set variable based on one class from an element that has more than one class

- by John

Hi I'm trying to make a table who's columns and rows highlight on hover (I realise there are jquery plugins out there that will do this, but I'm trying to learn, so thought I'd have a stab at doing it for myself.) Here's what I've got so far: $('th:not(.features), td:not(.features)').hover(highlight); function highlight(){ $('th.highlightCol, td.highlightCol').removeClass('highlightCol'); var col = $(this).attr('class'); $('.' + col).addClass('highlightCol'); }; $('tr').hover(highlightRowOn, highlightRowOff); function highlightRowOn(){ $(this).children('td:not(.highlightCol)').addClass('highlightRow'); }; function highlightRowOff(){ $(this).children('td:not(.highlightCol)').removeClass('highlightRow'); }; This works fine apart from one problem: Each 'td' has a class specific to it's column (package1, package2, package3, package4). It is this that gets passed to the variable (col) to add the class 'highlightCol' to a column when one of its 'td's are hovered on. However, If you move the cursor to a new column along a highlighted row, the 'td' you land on has two classes (highlightedRow and package* ). These both get passed to the variable and as a result the new column does not receive the correct class to highlight. Is there a way for me to target just the 'package* ' class and pass that to the variable while ignoring the 'highlightedRow' class? I hope that's not too jumbled for someone to make sense of and many thanks for any help offered.

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Error using a hyphen as an object property name in Flex

- by John Leonard

I'm trying to assemble a header object for an api request. One of the headers is 'Content-Type'. The hyphen is causing a compile error. Flex is giving me: 1050 - Cannot assign to a non-reference value. I find it spiteful that they enjoy the use of a hyphen in the error message while I hang my head and come here for answers.

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Using NSURLRequest+NSURLConnection seems overkill for a webcall with no data return

- by Spectravideo328

All, This might seems very straightforward but I have already gone through the URL loading system program guide and the various NSURL.... classes and not found my answer. I am just trying to do a simple call from the app to a website to reserve a party spot: NSString *path=[NSString stringWithFormat:@"http://www.myparty123.com/ireservedURL.asp?Nickname=%@&Seat=%i&Email=%@&Currentparty=%i",john,5432,[email protected],6598]; NSURL* reservationURL =[NSURL URLWithString:path]; NSData *call= [NSData dataWithContentsOfURL:reservationURL]; This seemed to be the simple way but I get this warning that I am not using the "call" variable. And it seems overkill to do a call using NSData where there is no data return. Yet, creating an NSURLRequest and initiating an NSURLConnection and then implementing delegates with that request seems to be overkill as well. What am I missing. Thanks KMB

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SVN Tree Conflict Errors

- by John

I seem to see such errors quite often in our SVN 1.6 repo. We got these quite a lot while we used to just work on /trunk so I don't think it's due to merge/branching confusion. It seems that a cleup and marking the conflict resolved always works, but it's a little concerning to see errors in your version control system when you're just adding/updating/deleting files. What causes it?

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Temporary users table or legitimate users table?

- by John

I have a freelance web application that lets users register for events. In my database, I have a t_events_applicants table with the column t_events_applications.user_id with a foreign key constraint linked to the t_users.user_id column. So this means only users who have registered with my web application can register for my web application's events. My client would now like to allow non-registered users, users who do not have an entry in my t_user table, to register for events. These non-registered users only need to provide their name and email address to register for events. Should I create a t_temporary_user table with columns name and email and then remove the t_events_applicants.user_id fk constraint? Or should I add un-registered users to the t_user table and then add a column called t_user.type where type can be 'registered' or 'non-registered'? How do I decide which approach to go with? A lot of times, I hesitate with either approach. I ask myself, "What if at a later time, a temporary user is allowed to become a fully registered user? Then maybe I should have only a t_user table. But then I also don't feel good about storing a lot of temporary users in t_user."

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.NET assembly not loading from NTVDM

- by John Reid

I have a VDD dll that's loaded by a DOS program running inside the NTVDM. This dll uses C++/CLI and references a .NET assembly. All in all, the loading process is something like this: NTVDM runs: prntsr.com which uses VDD RegisterModule to load: prnvdd.dll which references .NET assembly: prnlib.dll The prntsr.com, prnvdd.dll and prnlib.dll files are all in the same folder. However, when loading it, I get the following exception: Unhandled Exception: System.IO.FileNotFoundException: Could not load file or assembly 'PRNLib, Version=1.0.0.0, Culture=neutral, PublicKeyToken=ecf23cee305e91b7' or one of its dependencies. The system cannot find the file specified. File name: 'PRNLib, Version=1.0.0.0, Culture=neutral, PublicKeyToken=ecf23cee305e91b7' at VDD_Initialise() === Pre-bind state information === LOG: User = DOMAIN\user LOG: DisplayName = PRNLib, Version=1.0.0.0, Culture=neutral, PublicKeyToken=ecf2 3cee305e91b7 (Fully-specified) LOG: Appbase = file:///C:/WINDOWS/system32/ LOG: Initial PrivatePath = NULL Calling assembly : (Unknown). === LOG: This bind starts in default load context. LOG: No application configuration file found. LOG: Using machine configuration file from C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\config\machine.config. LOG: Post-policy reference: PRNLib, Version=1.0.0.0, Culture=neutral, PublicKeyToken=ecf23cee305e91b7 LOG: Attempting download of new URL file:///C:/WINDOWS/system32/PRNLib.DLL. LOG: Attempting download of new URL file:///C:/WINDOWS/system32/PRNLib/PRNLib.DLL. LOG: Attempting download of new URL file:///C:/WINDOWS/system32/PRNLib.EXE. LOG: Attempting download of new URL file:///C:/WINDOWS/system32/PRNLib/PRNLib.EXE. It only searches C:\WINDOWS\system32\ for the assembly, which I guess this is due to NTVDM.EXE - as this is the actual process that the assembly is being loaded into, it takes its location as the AppBase. Any ideas how to change the AppBase or otherwise work around this problem?

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mysql union query

- by Sergio

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DataTable Delete Row and AcceptChanges

- by Pang

DataTable DT num type name =================================== 001 A Peter 002 A Sam 003 B John public static void fun1(ref DataTable DT, String TargetType) { for (int i = 0; i < DT.Rows.Count; i++) { string type = DT.Rows[i]["type"]; if (type == TargetType) { /**Do Something**/ DT.Rows[i].Delete(); } } DT.AcceptChanges(); } My function get specific data rows in datatable according to the TargetType and use their info to do something. After the datarow is read (match the target type), it will be deleted. However, the row is deleted immediately after .Delete() execute, so the location of the next row (by i) is incorrect. For example, if TargetType is A. When i=0, the "Peter" row is deleted after .Delete executed. Then when i=1, I suppose it will locate the "Sam" row but it actually located "John" row because "Peter" row is deleted. Is there any problem in my codes?

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Find a name in a list if the name is spelt wrong

- by Matt

I've got a list of names which some code checks against to see if the person exists, and if so do some stuff.. My issue is that I want to handle the case of the name being entered incorrectly.. I.e. I have a list of names Bob Frank Tom Tim John If I type in Joohn, I want it to ask me if I meant John. If I type Tm, I get asked if I meant Tim, if I say no, it asks if i meant Tom.. Etc.. Has anyone done something like this before?

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Why is the servlet request not available in the portlet API

- by John Smith

The portlet API deos not provide any reference to the enclosing servlet request and response objects. I know it is not the preferred model of interaction with the user, but it seems draconian to remove all access. I understand that for portlet driven interaction with the user, you want to use portlet URLs, and let the portlet container manage all the complexity. However if you have a number of portlets which are basically showing variants of the same data, it makes sense for them to be able to use the enclosing request to drive the data. We ended up using using a Liferay specific call to get the request, and it all seems to work as we wish. However I do feel the guilt. So my question really is, is there an underlying deep reason for the prohibition, or is it just to enforce the authors view of the API environment?

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How can you prevent an individual window being captured by Print-Screen?

- by John

I noticed a few times than when I print-screen while Media Player is running, the content is replaced with a grey rectangle. I've no idea if it's deliberate due to DRM, or some technical issue, but it struck me that being able to deliberately block screen-capture might be a useful feature in some scenarios. I am not looking to fix the problem, but replicate it! Is there some specific message each HWND gets for print-screen - does Windows do a special repaint or simply dump buffers to the clipboard? I guess I'd prefer to focus this on Win32 specifically, but as long as it's Windows-related then fine.

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Memory leak in Apples 'Scrolling' sample code

- by John

Hi All, I'm using code based on Apple's "Scrolling" sample code - here's where I have a problem: // load all the images from our bundle and add them to the scroll view NSUInteger i; for (i = 1; i <= jNumImages; i++) { NSString *imageName = [NSString stringWithFormat:@"page%d.png", i]; UIImage *image = [UIImage imageNamed:imageName]; UIImageView *imageView2 = [[UIImageView alloc] initWithImage:image]; The UIImageView causes a leak - it doesn't seem to be releasing (though I do state [imageView2 release]; after adding the imageView as a subView to scrollView2 I have say 15 chapters of a book each held in a nav bar, each containing a scroll view with one chapters worth of these image views (each image is a page). When I get to around the second last chapter the app crashes due to the memory leaks... really annoying! I think it might be because imageView's been alloc'd twice (in alloc and in addSubView) but i'm not sure.... tried releasing twice but it didn't seem to help. any pointers? Thanks in advance ^.^

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