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• SelectOneMenu + CommmandButton

  - by Ignacio

  Hi I have the follonwing selectOneMenu <h:selectOneMenu value="#{modelsController.selected.idBrands}"> <f:selectItems value="{brandsController.itemsAvailableSelectOne}" /> </h:selectOneMenu> <br/> which is populated with all available brands in the bean. And I would like to create a button that retrives the brand selected in the mentioned selectOneMenu and display the records in the bean filtered by the selection (what I mean, is that if the user selected, aBrand in the selectOneMenu all models from abrand will be shown in a datatable. This is a simple CRUD jsf 2.0 with EcpliseLink. Could somebody point me in the right direction? Thank you very much

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• Project Euler #163 understanding

  - by Paul

  I spent quite a long time searching for a solution to this problem. I drew tons of cross-hatched triangles, counted the triangles in simple cases, and searched for some sort of pattern. Unfortunately, I hit the wall. I'm pretty sure my programming/math skills did not meet the prereq for this problem. So I found a solution online in order to gain access to the forums. I didn't understand most of the methods at all, and some just seemed too complicated. Can anyone give me an understanding of this problem? One of the methods, found here: http://www.math.uni-bielefeld.de/~sillke/SEQUENCES/grid-triangles (Problem C) allowed for a single function to be used. How did they come up with that solution? At this point, I'd really just like to understand some of the concepts behind this interesting problem. I know looking up the solution was not part of the Euler spirit, but I'm fairly sure I would not have solved this problem anyhow.

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• playing incoming video stream

  - by mawia

  Hi! all, I am writing an application which is a kinda video streamer.The client is receiving a video stream using udp socket.Now as I am receiving the stream I want to play it simultaneous.It is different from playing local video file lying in your hard disk in which case it can be as simple as running the file using system("vlc filename").But here many issues are involved like there can be delay in receiving and player will have to wait for the incoming data.I have come to know about using vlc to run a video stream.Can you please elaborate the step for playing the stream using vlc.I am implementing my application in c++. EDIT: Can somebody give me some idea regarding VLC API which can be used to stream a given video to particular destination and receive that stream at other end play it. with regards, Mawia

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• Java Web App: Passing form parameters across multiple pages

  - by digiarnie

  Hi, what is the best practice or best way of passing form parameters from page to page in a flow? If I have a flow where a user enters data in a form and hits next and repeats this process until they get to an approval page, what ways could I approach this problem to make the retention of data as simple as possible over the flow? I guess you could put all the information as you go in the session but could you get into memory issues if a lot of people are using your app and going through the flow at the same time?

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• Page break between columns group in RDCL report

  - by sintetico82

  I have on table matrix with columns group. I want that the table length is break on new page if change the group value. Example of my table; GROUP COLUMN 1 | GROUP COLUMN 2 |mounth1 | month2 | month3 | mounth4 | month5 | month6 TEXT1 | ............................................................ TEXT1 | ............................................................ Some one can help me? EDIT: I uploaded an image of the report. It's a very simple matrix table. I would like page break after the "Periodo" column its was changed value. Thank...

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• xCode screensaver with openGL

  - by moka

  Hi, I am currently simply trying to build a simple screen saver in xcode 3.2 on osx 10.6.3 using an openGL view as described in this article: http://cocoadevcentral.com/articles/000089.php anyways even if I use the exact same code from the example all I see when testing the screen saver is a black screen. I looked in OSX Console if it tells me anything useful. the only thing I get is something like this: [0x0-0x1e01e].com.apple.systempreferences[629] System Preferences(629,0x7fff71071be0) malloc: reference count underflow for 0x20057be80, break on auto_refcount_underflow_error to debug. System Preferences[629] invalid context I have no idea what is wrong, so I would be glad if someone could tell me how to use openGL together with the screensaver template in xCode 3.2. Also, is there a way to make another target so I can preview the screensaver from within xCode? Thanks!

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• Comobox event SelectedValueChanged

  - by IordanTanev

  Hi, i have simple question may be someone asked it before me but i could not find it.Let say i have datatable that has some data from the database and i want to bind it to a combobox i use standart code like this comboBox1.BeginUpdate( ); comboBox1.ValueMember = "id"; comboBox1.DisplayMember = "name"; comboBox1.DataSource = dt; comboBox1.EndUpdate( ); The problem is during this binding the event SelectedValueChanged is fired.The problem is that rebind combo several times when outher values change and every time i must do sometihn like this comboBox1.SelectedIndexChanged -= new System.EventHandler( this.comboBox1_SelectedValueChanged ); my question is there a smarter way to skip the event when i comes from databinding not from user input.The problem is that i want to do it some how globaly in my control that inherits combobox and not to do it everytime in every from Best Regards, Iordand

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• What are the most frustrating Python hacks to unwind, rewrite, etc.?

  - by Bialecki

  My impression of Python from the short time I've been developing with it is that it's incredible powerful and flexible, but I can't help but feel like "with great power comes great responsibility." So while I've read numerous blog posts about simple and elegant Python snippets that solve a problems, I wonder if there are design patterns or abuses of Python language features that, once built into an application or library, cause the code to be incredibly brittle and near impossible to refactor. So the question is basically what are the most frustrating, but somewhat common, Python "hacks" or language feature abuses that someone can introduce that will cause nightmares for future maintainers of that code?

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• Detect movie being played (Windows)

  - by modosansreves

  Watching a movie is quite a different user activity. User doesn't touch neither mouse nor keyboard. Yet he 'actively' uses the computer. Thus, screensaver shouldn't run, indexing should be performed with care etc. On the other side, playing video requires either using direct write to video memory, or DirectShow, or some other API. This may be the key to the answer. What is the Dead Simple Way to determine that a video is being played?

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• Rails 3 find all associated records has_many :through

  - by Sergey

  I would like to list all posts that are connected with some specific category. I have: class Post < ActiveRecord::Base has_many :category_posts has_many :categories, :through => :category_posts end class Category < ActiveRecord::Base has_many :category_posts has_many :posts, :through => :category_posts end class CategoryPost < ActiveRecord::Base belongs_to :category belongs_to :post end And I wanna do something like this Post.where(["category.id = ?", params[:category_id]]) It indeed is very simple task, but I don't know what I should be looking for (keywords). It's the same problem like this, but in rails.

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• Asynchrous calls cause StaleObjectStateException

  - by Mulone

  Hi all, I'm struggling with a Grails service. The service gets AJAX calls from the clients and behaves like a simple local cache for remote objects: void **someCallFromClient**() { // extract params def results = remoteService.queryService(params) results.each{ // try to fetch result object from local DB def obj = SomeClass.findBySomeField(result.someField) if (!obj){ obj = new Result(params) obj.save() } // do stuff on obj } } The service works fine when only one client is connected, but as soon as 2 or more clients start bombing the server with requests, I start getting: 2010-05-24 13:09:49,764 [30893094@qtp-26315919-2] ERROR errors.GrailsExceptionResolver - Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [ some object #892901] org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [ some object #892901] // very long stactrace It probably happens when 2 calls are trying to create the same object concurrently. I suppose this is a rather typical situation to end up in. Could you recommend any pattern/good practice to fix this issue? For example, is there a way to say to one of the service instances to hang on and wait for the other to finish its stuff and try again? Cheers!

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• Build Process failed with maven package

  - by vijay.shad

  Hi I am working on a maven project to build a simple utility api. The same source code when build on my office win XP machine, was successful. Now i am at home and working with same source code on CentOS machine. Here the build process failed strangely. The error it reports is ideally in my points should we warning message. As shown below. [ERROR] com.vsd.Provider:[12,240] The import java.util.Set is never used Can you please give me some idea, where can I look into?

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• IE problem with javascript

  - by Syom

  i have the following simple script <input class="input" type="text" name="password" style="color: #797272;" value= "<?php if ($_POST[password] != '') {echo '';} else {echo '????????';}?>" onclick="if (this.value === this.defaultValue) { this.value=''; this.style.color='black'; this.type='password'; }" /> it works fine, but in IE7 it doesn't change the input type. this.type='password'; doesn't work could you help me? thanks

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• Help modifying QuartzDemo example application

  - by BittenApple

  Can anyone please, oh sweet pain, please take me out of my misery by writing a simple example on how the heck you pass a number (int value) which gets created in 1 .m file to another .m file. In the apple demo application called QuartzDemo, there is a file called QuartzImages.m This file has the following line of code: [CODE]CGPDFPageRef page = CGPDFDocumentGetPage(pdf, 1);[/CODE] Notice the (pdf, 1) in that line. This number should be replaced with an integer variable. Now, there is also a file called MainViewController.m. In that file, there is a method? called -(void)viewDidLoad In that method, I want to assign a number to the integer variable which would replace the damn "1" with whatever number I want. I have been pulling my hair trying to get this done, reading beginning iPhone 3 Development book, dev documentation and God knows what not, without results. Any help would be greatly appreciated... Sigh.

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• audio error in vmware running mac os x

  - by PenguinSource

  simple synchronous loading of an audio file (.mp3) in a cocos2d app makes my vmware disconnect the sound. the error is display bottom right, saying 'error in creating sound stream; sound is disconnected' i read that it might be cause of my vmware's version (mine is 8) but I'm looking for a fix, not to downgrade to another version. before i get that error, the sound on the system works just fine (youtube, etc) the exact code im calling is.. [CDSoundEngine setMixerSampleRate: CD_SAMPLE_RATE_MID]; [[CDAudioManager sharedManager] setResignBehavior: kAMRBStopPlay autoHandle:Yes]; soundEngine = [SimpleAudioEngine sharedEngine]; [soundEngine preloadBackgroundMusic:@"somemp3.mp3"]; [soundEngine playBackgroundMusic:@"somemp3.mp3"]; maybe the bit rate is too high .. ? thanks

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• How can I make a UIPickerView like a UIDatePicker?

  - by iamthepiguy

  I have a custom UIViewController subclass which acts as Datasource and Delegate for a UIPickerView which I would like to serve two different purposes, as each are simple enough, and don't really warrant separate files. One operation must be as a custom picker, and this works fine. However, for the other operation, I want it to act just like a UIDatePicker. The problem is, UIDatePicker is a subclass of UIControl, not UIPickerView. Is there any sort of enum value I can set in a method (or other way) that will set the UIPickerView to act as a date picker? Or do I have to make two completely different classes and use them differently (pain in the ass)?

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• Problem with TabHost UI layout.

  - by Alan B

  What I'm trying to do is create a layout like this: +--------+ Search |EditText| [Button] +--------+ +---------+ |Tab 1 |---------+ | |Tab 2 | |---------+---------+-----------------+ | ListView Item 1 | | ListView Item 2 | | ListView Item 3 | | ListView Item 4 | | ListView Item 5 | | ListView Item 6 | | ListView Item 7 | | ListView Item 8 | | ListView Item 9 | | ListView Item 10 | +-------------------------------------+ So that's a TextView saying 'Search', an EditText and a button. Then below it the tabs - Tab 1 has a ListView, Tab 2 some other stuff. I can get a simple TabHost setup with two tabs working fine but can't get the above to lay out properly. Any hints ? I'd create the UI in the Eclipse designer and check the XML from that, except the designer doesn't work with TabHost. And DroidDraw doesn't seem to know about TabHost.

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• iphone web app: open directions in external maps application

  - by munchybunch

  I've seen the answers for opening the Maps app in a native iPhone app, but is there any way to do this in a web app? I've tried changing window.location to http://maps.google.com/maps?q=cupertino for example, to no avail. I've tried using a simple anchor tag linked to http://maps.google.com/maps?q=cupertino, also to no avail. Has anyone gotten this to work before? I'm working on a map-heavy application, and I'd like to provide users with directions at the end. I figured it would be easiest to simply open it up in the Map application. Note: I'm currently testing with just the simulator, could that lead to problems? My iPhone is down for the count at the moment.

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• Coldfusion CFC creation taking a variable amout of time to execute.

  - by Bazza

  I've been doing some logging of object creation times in our open account process in production. Periodically, initializing an object would take way longer than expected. By initializing I mean calling it's init() and passing a couple of arguments that may be simple variables or objects. e.g. <cfset validateObj = createObject("component", "compExample").init( productionMode = VARIABLES.productionMode, ipWhiteListed = isWhiteListed, ipLocatorObj = VARIABLES.ipLocatorObj ) /> Thats all that happens in init() methods. Generally the execution time would be 0ms, but at random times I might get 3 or 3.5 seconds. This is not specific to one particular server or to our generally busy period. It appears to be quite random. One thought was that these templates were being evicted from our template cache as they are not especially frequently used, although I checked cfstat on a number of servers and the max CP/Sec is -1. Running CF 8,0,1 Has anybody else ever come across this?

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• Create function in python to find the highest of all function arguments, and return the "tag" of the value.

  - by gatechgrad

  Consider the following: p1=1; p2=5; p3=7; highest=max(p1,p2,p3). The max function would return 7. I am looking to create a similar function, which would return "p3". I have created a small function (by simple comparisons) for the above example, shown below. however I am having trouble when the number of arguments go up. def highest(p1,p2,p3) if (p1p2) and (p1p3): return "p1" if (p2p1) and (p2p3): return "p2" if (p3p1) and (p3p1): return "p3". Is there a simpler way to do this

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• What is an alternative to ADO.NET, but elegant way in C# to read Excel files

  - by Khnle

  ADO.NET just fails miserably when it's used to read Excel files where a column contains mixed data types. It appears that it tries to determine the data type of a column, and then assume the rest of the entire column is of the same data type. Here are some backgrounds: http://stackoverflow.com/questions/2968111/how-to-prevent-ado-net-from-altering-double-values-when-it-reads-from-excel-files http://blog.lab49.com/archives/196 What is an alternative approach that doesn't require automation, Excel to be co-installed, is simple (since the input excel file will only have one worksheet in each file).

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• Which language + framework should I use for building standalone clients for my PHP webapp?

  - by Jagira

  Hello, I have a PHP web application which basically maintains a set of user profiles and their records. My users are using the app via browser. I am planning to build a standalone desktop client/app for WINDOWS OS, in which a user can login, retrieve and modify the records. Which language + framework will be simple, fast and lightweight to use? I can think of the following options: Microsoft Visual Basic - simplest? Microsoft Visual C++ Python PHP + bambalam compiler Are there any other options? And which of these is better?

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• Setting selected item on Listbox in Silverlight - Windows Phone 7

  - by Fishcake

  I have a databound Listbox bound to a generic list as follows (Provider is a very simple class that just includes a single property (Name). ProviderList = new List<Provider>(); //Populate list Providers.ItemsSource = ProviderList; I can save the selected item with no problem but I can't manage to set the selected item from code afterwards. I am trying to do so as follows: int x = Providers.Items.IndexOf((Provider)_Settings["provider"]); However IndexOf() is always returning -1. If I inspect both Providers.Items[1] and _Setting["provider"] at runtime using the immediate window they both return {StoreRetrieveData.Provider} Name: "Greenflag" Am I doing something wrong (well clearly I am)?

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• Submit jQuery UI dialog on <Enter>

  - by CMB

  I have a jQuery UI dialog box with a form. I would like to simulate a click on one of the dialog's buttons so you don't have to use the mouse or tab over to it. In other words, I want it to act like a regular GUI dialog box where simulates hitting the "OK" button. I assume this might be a simple option with the dialog, but I can't find it in the jQuery UI documentation. I could bind each form input with keyup() but didn't know if there was a simpler/cleaner way. Thanks.

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• how to add parameters with mulitselection enabled in ssrs 2008

  - by Sheikh Usman

  Hi, I have a table called Resource, and i am making a line chart (the chart is complicated, so just assume its a simple xy line chart). I want to execute the report with different resources. I have added a new parameter and bound it to a dataset to return a dropdownlist of resource names. Can i do a mulitiple selection of resource. for example if i want to make chart with ResourceA and ResourceB, only, can i select these two resources from the dropdownlist of parameters. cheers, Oz

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