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• Tab container - Button event is not firing

  - by Zerotoinfinite

  Hi experts, In tab container let say I have two tabs [Tab1 & Tab2] Tab1 has 2 text box with required field validator Tab2 has 3 text box with required field validator Now even if I am filling all the text boxes in the TAB1, it is not allowing me to postback. [because TAB2 text boxes are still empty] & When I am filling all the textboxes [Both Tab1 & Tab2], button is firing correctly. How to avoid this ?? I mean user has to fill details for the TAB1 & can submit the details. At that Time I don't want TAB2 validations to work. Please help & kindly let me know if anything else is required.

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• Double associative array or indexed + associative array

  - by clover

  I'm undecided what's the best-practice approach for what I'm trying to do. I'm trying to enter data into an array where the data will look like this: apple color: red price: 2 orange color: orange price: 3 banana color: yellow price: 2 pineapple color: yellow price: 5 When I get input, let's say green apple (notice it's a combo of color + name of fruit), I'm going to check if the name of fruit part exists in the array and display its data (if it exists). What's the right way to compose those arrays? How would I do an indexed array containing an associative array? (or would this be better as 2 nested associative arrays, I'm guessing not)

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• Voting software with remote units - architectural questions

  - by David Neale

  I'm looking at designing some software that registers live votes (let's say A,B,C or D). The vote needs to be picked up and processed by a .NET engine. The remote voting units should be as small as possible. What form of data transmission should be used for the voting? The data is obviously very simple but there is a need to make sure each unit can only vote once per question. How would the data be received by the computer running the software?

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• Is it possible to have a Ocaml function that accepts only integer lists?

  - by Sam

  I'm writing a recursive function in Ocaml that's supposed to count the number of items in an integer list (Yes I know there's a List.length function but I'm trying to do it myself). However the Ocaml compiler/interpreter forces me to use alpha list all the time. So is it wrong to say that, when a function accepts a list as a parameter, the type of that list must always be alpha? Thanks EDIT: the reason why it's inconvenient for me to use alpha lists is because i can't compare the head of the alpha list with an integer value due to type-matching complaints

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• iphone using 2 tableview

  - by Anonymous

  Hi, I 'm a iphone programming newbie. I m trying to implement an app with multi-level tableviews. The idea is if someone selects something on the first screen say then a new view opens(tableview) car make> list of models Honda > Acura, S2000,accord ... My challenge is to show the list of models in a new tableview & secondly change the size of hte list depending on the car selected. I have programmed so that when i select 'Honda' a new tableview opens. How do i populate data for the second table?? Any suggestions on how to proceed? thanks

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• Two models, one STI and a Validation

  - by keruilin

  Let's say I have two tables -- Products and Orders. For the sake of simplicity assume that only one product can be purchased at a time so there is no join table like order_items. So the relationship is that Product has many orders, and Order belongs to product. Therefore, product_id is a fk in the Order table. The product table is STI -- with the subclasses being A, B, C. When the user orders subclass Product C, two special validations must be checked on the Order model fields order_details and order_status. These two fields can be nil for all other Product subclasses (ie A and B). In other words, no validation needs to run for these two fields when a user purchases A and B. My question is: How do I write validations (perhaps custom?) in the Order model so that the Order model knows to only run the validations for the two fields -- order_details and order_status -- when Product subclass C is being saved to the orders table?

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• Can anyone tell me what the authors mean on this line?

  - by Anirudh Goel

  i was going through this link: FAT16 Basics to Assemble Clusters. I have read the structures involved in defining a directory entry in FAT. Now when giving the example for a FAT16 File, it says the data cluster is 0x03 for the example file MyFile.txt. Which means if we logically compute the Data Cluster we will be able to reach to the first node which happens to be cluster no 3. But what I fail to understand is what the author is trying to say in the next line where it says What we can see in the File Allocation Table at this moment? How suddenly we reach to the File Allocation Table? Weren't we already there when we were going through the information of Myfile.txt? I couldn't find any reason how suddenly the author jumped to an offset location of 00000200 and is identifying the emptiness of the clusters. It will be great if someone can help me understand. Thanks

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• How to move an element in a sorted list and keep the CouchDb write "atomic"

  - by karlthorwald

  I have elements of a list in couchdb documents. Let's say these are 3 elements in 3 documents: { "id" : "783587346", "type" : "aList", "content" : "joey", "sort" : 100.0 } { "id" : "358734ff6", "type" : "aList", "content" : "jill", "sort" : 110.0 } { "id" : "abf587346", "type" : "aList", "content" : "jack", "sort" : 120.0 } A view retrieves all "aList" documents and displays them sorted by "sort". Now I want to move the elements, when I want to move "jack" to the middle, I could do this atomic in one write and change it's sort key to 105.0. The view now returns the documents in the new sort order. After a lot of sorting I could end up with sort keys like 50.99999 and 50.99998 after some years and in extreme situations run out of digits? What can you recommend, is there a better way to do this? I'd rather keep the elements in seperate documents. Different users might edit different elements in parallel (which also can get tricky). Maybe there is a much better way?

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• RTSP streaming and save into mp4 file using VLC

  - by Vivek Navadia

  Hello All let say i am having one RTSP url (rtsp://192.168.0.17/mpeg4). the live camera is setup on the machine which relay live video. i am streaming it using vlc player and i am saving it in mp4 file on some location (i.e. c:\temp.mp4). Now i am opening another vlc player instance and open this file (c:\temp.mp4). but as it is in use and saving live streaming to that file. that will not be played. if if stop the streaming and then played temp.mp4 file then it will play the streamed (saved) video. Now my requirement is VLC player should also stream and save into temp.mp4 file continuously and at the same time that file should be played in any standard player. is it possible to do with any option using VLC player that we can do both this things simultaneously. Thanks Vivek

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• C++/CLI: Compiling static library with /CLR support

  - by user289770

  We have old (working) code that consists of a static library compiled with /CLR, and a C++/CLI DLL that links to the static lib. We are about to add new features to this static lib. Now, I've have heard from numerous sources that CLR static libraries are not supported by Microsoft, and therefore I'm pushing to clean this up and switch to DLL before we start adding new features to this project. However, I haven't been able to find any official information from Microsoft regarding this (say, from MSDN - other than their forums). I will appreciate any resources about this whole "static lib with CLR" issue.

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• MS Chart Control for ASP.NET 100% Stacked Bar Chart Question.

  - by Jacob Huggart

  Hello All, I am trying to display a chart with several different bars that represent a ratio of some values. For example, one bar may say that there are 25 items in three different groups (maybe dirty, clean, and broken) and of those 25 items x items from each category add up to the total. Later the data will dynamically change and be displayed accordingly. But for now all I want to do is be able to display three different values on the same bar. Unfortunately, whatever properties I need to bind the data to are buried somewhere in the menus and I cannot seem to find them. Do any of you guys have experience with this sort of chart?

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• How doe we name test methods where we are checking for more than one condition?

  - by Sandbox

  I follow the technique specified in Roy Osherove's The Art Of Unit Testing book while naming test methods - MethodName_Scenario_Expectation. It suits perfectly well for my 'unit' tests. But,for tests that I write in 'controller' or 'coordinator' class, there isn't necessarily a method which I want to test. For these tests, I generate multiple conditions which make up one scenario and then I verify the expectation. For example, I may set some properties on different instances, generate an event and then verify that my expectations from controller/coordinator is being met. Now, my controller handles events using a private event handler. Here my scenario is that, I set some properties, say 3 condition1,condition2 and condition3 Also, my scenario includes an event is raised I don't have a method name as my event handler is private. How do I name such a test method?

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• Cross-domain REST proxy with Javascript, HTML5

  - by Bosh

  I'm writing a service (say, service.com) that provides a REST API to external apps running inside of IFrames. (These apps are hosted from domains outside the service.com). I'm planning a javascript client library for the apps to make pure-javascript requests to the service.com REST API -- basically using postMessage and some ad-hoc encapsulation of my API calls to get messages back and forth across frames (from the outside-app.com IFrame -- service.com REST API, and back to the IFrame with a response). My question: is there any robust, general-purpose javascript library to accomplish the kind of cross-domain REST request proxying I need, or should I just hack it from scratch?

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• SqlParameter contructor compiler overload choice

  - by Ash

  When creating a SqlParameter (.NET3.5) or OdbcParameter I often use the SqlParameter(string parameterName, Object value) constructor overload to set the value in one statement. When I tried passing a literal 0 as the value paramter I was initially caught by the C# compiler choosing the (string, OdbcType) overload instead of (string, Object). MSDN actually warns about this gotcha in the remarks section, but the explanation confuses me. Why does the C# compiler decide that a literal 0 parameter should be converted to OdbcType rather than Object? The warning also says to use Convert.ToInt32(0) to force the Object overload to be used. It confusingly says that this converts the 0 to an "Object type". But isn't 0 already an "Object type"? The Types of Literal Values section of this page seems to say literals are always typed and so inherit from System.Object. This behavior doesn't seem very intuitive given my current understanding? Is this something to do with Contra-variance or Co-variance maybe?

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• iPhone SDK/General Xcode question.

  - by user354779

  In the iPhone SDK, in my .n, I can say: -(IBOutlet) UITextField *MyNameIs; -(IBOutlet) UILabel *DisplayMyNameIsHere; } -(IBAction)PressButtonToDisplayYourName; Then in my .m, I'll do: -(IBAction)PressButtonToDisplayYourName { DisplayMyNameIsHere = MyNameIs.text; } But now how would I translate that to making a Mac application. If I wanted to display someones name from a textfield in a label? I have been trying to figure this out, but the ".text" extension only works in the iPhone SDK, not the Mac SDK. Someone please help! Thanks!

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• JSF : Better way to check for existence of <h:message for="id"/>

  - by user552809

  I have a form in which validation error message needs to be displayed below the input elements. The error needs to be highlighted by showing an error bubble around the error message and the input text. To achieve this, I need to check for the existence of h:messages for individual elements. I am able to check for the existence of global error messages as follows <h:panelGroup rendered="#{not empty facesContext.messages}"> </h:panelGroup> How I can check the same for specific client id (say first name). So something like faceContent.messages("creditCardNo") A solution I have currently is to create a custom resolver but was wondering if there is a better solution.

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• MSP430 CMP operator

  - by Ludicrous

  Let's say I have the MSP430 assembly segment below: r15: 439c Memory map: 4390: 6045 0200 9c43 6400 8844 5044 363a 0000 Code: 448a: cmp #0x363a, 0x0(r15) 4490: jnz $+0x1c 4492: Code continues . . . 44ac: Jump to location The goal is to have the Z flag high. To do this with a cmp, both src and dst must be equal. If I have 363a in the memory location of r15, why is it that the resulting cmp does not trigger the Z flag? Through experimentation, I found that putting 3a36 in the memory location of r15 did in fact trigger the Z flag, but I don't understand why. If anyone could bring this to light, I would greatly appreciate it. If more information is needed, I will gladly provide it.

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• Polymorphic functions with parameters from a class hierarchy

  - by myahya

  Let's say I have the following class hierarchy in C++: class Base; class Derived1 : public Base; class Derived2 : public Base; class ParamType; class DerivedParamType1 : public ParamType; class DerivedParamType2 : public ParamType; And I want a polymorphic function, func(ParamType), defined in Base to take a parameter of type DerivedParamType1 for Derived1 and a parameter of type DerivedParamType2 for Derived2. How would this be done without pointers, if possible?

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• RESTful services and update operations

  - by Igor Brejc

  I know REST is meant to be resource-oriented, which roughly translates to CRUD operations on these resources using standard HTTP methods. But what I just wanted to update a part of a resource? For example, let's say I have Payment resource and I wanted to mark its status as "paid". I don't want to POST the whole Payment object through HTTP (sometimes I don't even have all the data). What would be the RESTful way of doing this? I've seen that Twitter uses the following approach for updating Twitter statuses: http://api.twitter.com/1/statuses/update.xml?status=playing with cURL and the Twitter API Is this approach in "the spirit" of REST? UPDATE: PUT - POST Some links I found in the meantime: PUT or POST: The REST of the Story PUT is not UPDATE PATCH Method for HTTP

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• Cross-reference between delphi records

  - by Paul-Jan

  Let's say I have a record TQuaternion and a record TVector. Quaternions have some methods with TVector parameters. On the other hand, TVector supports some operations that have TQuaternion parameters. Knowing that Delphi (Win32) does not allow for forward record declarations, how do I solve this elegantly? Using classes is not really an option here, because I really want to use operator overloading for this rare case where it actually makes good sense. For now I simply moved these particular methods out of the records and into separate functions, the good old-fashioned way. Better suggestions are most welcome.

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• Of Datagridviews, databinding, and non validating cell values.

  - by Yanko Hernández Alvarez

  Lets simplify. Lets say I have this class: class T { public string Name { get; set; } public int Age { get; set; } public int height{ get; set; } ... } and I have a DataGridView's DataSource bound to a BindingList <T>, with N columns, each one bound to each property. I need to: Allow the user to enter non validating ages, heights, etc (for instance "aaa") Color the cells with non validating values (red background) Retain the non validating values displayed until the form is closed (I don't want to lose the values entered until the form is closed, so the user has the option to correct the bad cells anytime he wants BEFORE closing the form) Keep the last correct values entered for each cell with non validating values entered. When the form is closed, ditch the non validating values and keep the last correct values entered. Is there any easy way to do this?

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• javascript string exec strange behavior

  - by Michael

  have funciton in my object which is called regularly. parse : function(html) { var regexp = /...some pattern.../ var match = regexp.exec(html); while (match != null) { ... match = regexp.exec(html); } ... var r = /...pattern.../g; var m = r.exec(html); } with unchanged html the m returns null each other call. let's say parse(html);// ok parse(html);// m is null!!! parse(html);// ok parse(html);// m is null!!! // ...and so on... is there any index or somrthing that has to be reset on html ... I'm really confused. Why match always returns proper result?

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• when does a software become "proprietary" ?

  - by wefwgeweg

  say a company is using Open source libraries, or programs, and packaging it into a proprietary solution. or perhaps, the engineers have copy pasted certain section of those open source libraries and have compiled it now, into a very useful "proprietary" software suite. what legal troubles will this company face if any ? are you allowed to do this ? i mean the customer doesn't see the source codes, only runs the binary files on their computer. for example, i find an excellent NLP library in python, and decide to use it in my program that i am selling for $4000 USD (i write like 10 lines of code and let the library do the work). could i get into trouble ? would i need to write the NLP library myself from scratch to be considered "proprietary" ? danke

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• Need a list of all countries in the world, with a longitude and latitude coordinate

  - by ptrn

  I need a list of all the countries in the world, with one lat/long coordinate for the country. I had a look at GeoNames, but all I can seem to find are lists that have the countries as well as cities in the same list. I guess I can just parse it and filter out the countries, but I was hoping to avoid that. Basically, what I need; Country name - Lat/long coordinate (some sort of center of the country) It doesn't need to say anything about continent, but I wouldn't mind if it did. _L

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• Linker library for OpenMP for Snow Leopard?

  - by unknownthreat

  Currently, I am trying out OpenMP on XCode 3.2.2 on Snow Leopard: #include <omp.h> #include <iostream> #include <stdio.h> int main (int argc, char * const argv[]) { #pragma omp parallel printf("Hello from thread %d, nthreads %d\n", omp_get_thread_num(), omp_get_num_threads()); return 0; } I didn't include any linking libraries yet, so the linker complains: "_omp_get_thread_num", referenced from: _main in main.o "_omp_get_num_threads", referenced from: _main in main.o OK, fine, no problem, I take a look in the existing framework, looking for keywords such as openmp or omp... here comes the problem, where is the linking library? Or should I say, what is the name of the linking library for openMP? Is it dylib, framework or what? Or do I need to get it from somewhere first?

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