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• XCode 3.2 - can't create Objective-C class

  - by Urizen

  My installation of XCode 3.2 has begun to exhibit some strange behaviour. When I try to add a basic Objective-C classs (inheriting from NSObject), in my iPhone project, I get the following popup: "Alert. Couldn't load the next page". The above-mentioned error happens at the point of trying to create the file (i.e. the creation process doesn't get to the stage where you are asked to input the file name). It might also be worth mentioning that where there previously used to be a description for the file (in the file creation window) it now states "No description available". I can create other files (e.g. UIViewController subclass etc.) but not the basic Objective-C class. I have updated the documentation and restarted the machine and xcode several times without success. I would be extremely grateful for any assistance as I am relatively new to the XCode environment.

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• Linq to Sql saying that item by 'Customer' already exists. Choose a different name.

  - by Anthony Potts

  I have been going round and round with a linq to sql file while using svn for quite some time. The latest is that my dbml file shows as having an error which states that An item named "Customer" already exists. Please choose a different name. And then it repeats that again. In fact, it says it for almost every object. What is my fix? I have tried renaming the one named Customer, but that didn't fix it. I don't know where to go to fix this. I went to the .dbml file and don't see any duplication, and I went to the .dbml.layout file and didn't see any duplication there either.

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• Web Standards alternatives to Flex/Silverlight (I mean serious alternatives, not just JS framewoks)

  - by user252160

  Is there a set of open standards technologies that I can use to achieve the same way of development as in Flex and Sivlerlight? I am talking about componentization, separation of concerns, rich graphics, states and effects . Please point out some tutorials and other resources if possible. P.S. I KNOW that this is technically possible, so please do not respond by sending google search results or general JQuery tutorials. I've seen those already. I need to know how a Flex / Silverlight developer could design and implement an application in roughly the same way (imagine a rich HTML tag set, much like XAML/MXML, behind which stands JavaScript responsible for handling events and business logic. Think also about binding)

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• Why can't I set a custom color-tint for the UINavigationBar?

  - by mobibob

  I want to change the color on the navigation bar and the documentation states not to attempt to change the 'alpha' value. So, how can I set a color that is not the SDK defined values (e.g., [UIColor redColor], brownColor, etc.) if all the constructors provide an alpha value? I tried getting the current alpha value but that did not help. When I use a custom color, it causes the navigation bar to look like an x-ray (a scraggy, black-on-white). [self.navigationController.navigationBar setTintColor: [UIColor brownColor]];

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• What is the correct syntax for using HTML builder with mixed content in Groovy 1.7?

  - by stian

  On the Groovy example page there is an example of how to use Groovy HTML builder with mixed content: p [ "This is some", b"mixed", "text. For more see the", ahref:'http://groovy.codehaus.org' ["Groovy"], "project" ] This is however not working for me, I get an error message like: expecting ']', found 'mixed' @ line 33, column 23. b"mixed", ^ 1 error The Groovy example page states that: [Note: the syntax in some of these examples is slightly out-dated. See chapter 8 of GINA in the mean-time until these examples are updated.] My suspicion therefore is that the syntax of the HTML builder has changed, however I don't have the book so I cannot check and I cannot seem to find any relevant example of this working online. Does anyone know how the syntax is supposed to be in Groovy 1.7 and have got this working?

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• decimal.TryParse() drops leading "1"

  - by Martin Harris

  Short and sweet version: On one machine out of around a hundred test machines decimal.TryParse() is converting "1.01" to 0.01 Okay, this is going to sound crazy but bare with me... We have a client applications that communicates with a webservice through JSON, and that service returns a decimal value as a string so we store it as a string in our model object: [DataMember(Name = "value")] public string Value { get; set; } When we display that value on screen it is formatted to a specific number of decimal places. So the process we use is string - decimal then decimal - string. The application is currently undergoing final testing and is running on more than 100 machines, where this all works fine. However on one machine if the decimal value has a leading '1' then it is replaced by a zero. I added simple logging to the code so it looks like this: Log("Original string value: {0}", value); decimal val; if (decimal.TryParse(value, out val)) { Log("Parsed decimal value: {0}", val); string output = val.ToString(format, CultureInfo.InvariantCulture.NumberFormat); Log("Formatted string value: {0}", output); return output; } On my machine - any every other client machine - the logfile output is: Original string value: 1.010000 Parsed decimal value: 1.010000 Formatted string value: 1.01 On the defective machine the output is: Original string value: 1.010000 Parsed decimal value: 0.010000 Formatted string value: 0.01 So it would appear that the decimal.TryParse method is at fault. Things we've tried: Uninstalling and reinstalling the client application Uninstalling and reinstalling .net 3.5 sp1 Comparing the defective machine's regional settings for numbers (using English (United Kingdom)) to those of a working machine - no differences. Has anyone seen anything like this or has any suggestions? I'm quickly running out of ideas... While I was typing this some more info came in: Passing a string value of "10000" to Convert.ToInt32() returns 0, so that also seems to drop the leading 1.

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• Using PHP script to fill in XML

  - by Yaaqov

  Hi - we are all familiar with "embedding" PHP scripts in HTML pages to do tasks like displaying form results, but how can that be done in a way that displays XML? For example, if I wrote: <? xml version='1.0' ?> <Responses> <?php $body = $_GET['Body']; $fromPh = $_GET['From']; echo echo "<Msg>Your number is: $fromPh, and you typed: $body.</Msg>" ?> </Response> I get a message that states "parse error, unexpected T_STRING on line 1". Any help or tutorials would be appreciated.

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• Hibernate MySQL transaction configuration issue

  - by James

  I'm having trouble starting a transaction with Hibernate and MySQL while running in JUnit. I'm getting a HibernateException which states: "No TransactionManagerLookup specified". I believe this error is because I don't have a proper configuration setting for hibernate.transaction.manager_lookup_class. I see that under the namespace of org.hibernate.transaction there are quite a few different lookup classes that I could use. All of the documentation that I could find on these was very vague. My question is what is the appropriate one for MySQL?

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• Geographical ontologies ready to use?

  - by Mulone

  Hi all, I'm looking for an ontology containing geographical knowledge. In particular I'd like to have these types of information: political states / regions / cities / city areas geographical regions (e.g. continents, name of mountains, lakes, etc) For example, starting from the node "New York" I'd like to be able to find parents like the New York state, the USA etc, and children like Manhattan, Bronx, etc. I couldn't find anything open-source/free to use. I know that a lot of researchers extract such information from Wikipedia, but I couldn't find any off-the-shelf packages to use. I also checked OpenStreetMap, which is great for the amount of data but doesn't seem to contain a proper geographical ontology. Even a web service would be good! Any hints? Mulone

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• How to handle value types when embedding IronPython in C#?

  - by kloffy

  There is a well known issue when it comes to using .NET value types in IronPython. This has recently caused me a headache when trying to use Python as an embedded scripting language in C#. The problem can be summed up as follows: Given a C# struct such as: struct Vector { public float x; public float y; } And a C# class such as: class Object { public Vector position; } The following will happen in IronPython: obj = Object() print obj.position.x # prints ‘0’ obj.position.x = 1 print obj.position.x # still prints ‘0’ As the article states, this means that value types are mostly immutable. However, this is a problem as I was planning on using a vector library that is implemented as seen above. Are there any workarounds for working with existing libraries that rely on value types? Modifying the library would be the very last resort, but I'd rather avoid that.

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• How to zoom in google map (J2ME)

  - by Nivek

  Hi all, I am trying to develop a J2ME application that could retrieve the google map by passing in the GPS coordinates. From http://wiki.forum.nokia.com/index.php/Google_Maps_API_in_Java_ME, it provides the Utility method for map scrolling. Basically it states that i need to include MicroFloat library in my project. Here's what i did (Not sure if i am doing it right) Create a project, build the code. Add the jar file into my current project lib. but i am still getting error from codes. Example double LToY(double y) { return Math.round( offset - radius * Double.longBitsToDouble(MicroDouble.log( Double.doubleToLongBits( (1 + Math.sin(Math.toRadians(y))) / (1 - Math.sin(Math.toRadians(y))) ) )) / 2); } Am i missing any import statment??? Btw i am using netbeans 6.5. Thanks for any guidance... Kevin

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• How could the year 2010 be mistaken as a leap year? [closed]

  - by Templar

  According to news reports such as this one, older Playstation 3 game consoles incorrectly considered the year 2010 to be a leap year. The problem persisted through most of the Monday, March 1, which older PlayStations thought was Feb. 29, 2010, a date that doesn't exist. The standard leap year formula states that a leap year is any year that is divisible by 4, but not by 100, except if divisible by 400. The year 2010 doesn't fit any of those criteria. Any idea what programming error would have caused this?

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• Consultant "branding" problem

  - by James Jones

  Where I work, we employ a consultant to do a considerable amount of work for us to hold us over until we can hire/train more staff. He has been working with us for quite a long time now, and he has always had this strange habit of leaving his initials on EVERYTHING he touches, as if its his sort of branding or advertising. And by everything, I mean: Database names Table names Variable names Web service names File names Server names etc... Is this a common practice among consultants? We politely asked if he could remove some of the branding, but he typically scoffs and quotes exorbitant time estimates to perform such 'silly' refactorings. I guess we could leave it alone, but it's really annoying to have to type out his name every time we reference something he made. Any recommendations on how to approach this problem? Edit: Our contract with him states that we "own" everything he makes for us.

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• ruby on rails state machines

  - by srboisvert

  I'm looking to implement a state machine to manage a user moving through a series of steps over an extended period of time (weeks) with emails and then they interact with the app. I've looked at a couple of AASM plugins and forks (it seems like this plugin space has become a bit chaotic) and am curious what people would recommend. I saw the automatic AASM by hashrocket, that transitions states using cron, and from the title it looks like it might fit the bill but there doesn't appear to be any documentation anywhere and it looks more like a skeleton app than a plugin.

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• ReadOnly Property in Custom Column Types in Sharepoint

  - by Ray Booysen

  Hey all I'm creating a custom column in a feature for Sharepoint. It is essentially this: <Field Type="Integer" ID="<insert guid here>" ReadOnly="true" Name="xxx" DisplayName="XXX" Group="YYY" /> When the field is deployed and attached to a content type, the content type shows no instance of this field being attached. The documentation about ReadOnly is a bit vague but definitely states that the column will be available for viewing in a View. However, when I create a view it is not available. The moment I remove ReadOnly from the field, it is available on the content type without any problems. Any ideas?

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• emacs23 pops up debugger way too frequently

  - by werner r.

  Since I've upgraded to Ubuntu lucid and emacs23, Emacs pops up the debugger in situations, where emacs22 does not. For example, when hitting C-c C-c in org-mode, emacs22 simply states can do nothing useful at this location, whereas in emacs23 the debugger shows up. Debugger entered--Lisp error: (error "C-c C-c can do nothing useful at this location") signal(error ("C-c C-c can do nothing useful at this location")) error("C-c C-c can do nothing useful at this location") org-ctrl-c-ctrl-c(nil) call-interactively(org-ctrl-c-ctrl-c nil nil) That only illustrates the pattern -- the behavior is not limited to org-mode. Occurring every 3 minutes, it really annoys me. How can I prevent it? I've already tried to stop this using debug-on-error and stack-trace-on-error: it didn't work.

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• How to load a page with its default values after a postback

  - by Shrage Smilowitz

  I'm creating user controls that i will put into an update panel and make them visible only when required using triggers. Once visible it will float in a dialog box so it has a close button which will just hide the control on client side. The controls have multiple post back states, like a wizard, i'm using a multi view control to accomplish that. My problem is that once the user is at step number two in the control, if the user closes the dialog, than opens the dialog again, (note that the control is made visible on the server and reloaded by updating the updatepanel) the second step will still be displayed. The reason is . because whenever there is a postback the control will load its state using the viewstate, even if EnableViewState is false it will still load it using the LoadControlState method. so my quesion is how can i force a user control to load fresh with its default values without any postback data.

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• Why use I-prefix for interfaces in Java?

  - by Lars Andren

  Is there some reason why people use I-prefix for interfaces in Java? It seems to be a C#-convention spilling over. For C# it makes sense, as the answers to this question explains. However, for Java a class declaration clearly states which class that is extended and which interfaces that are implemented: public class Crow extends Animal implements Bird I think Joshua Bloch didn't suggest this in Effective Java, and I think he usually makes a lot of sense. I get the I-verbing as presented in an answer to the question above, but is there some other use with this convention for Java?

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• Problem with Apache Commons Id UUID Version 1 generation

  - by Pekka Mattila

  My problem is to generate version 1 UUIDs. We use Jetty 6.x, Maven (to start Jetty among other things) and Apache Commons ID (to generate UUID version 1 from the current time). Apache Commons ID requires a configuration file that is told to the JVM, using a parameter, e.g. 'org.apache.commons.id.uuid.config.resource.filename=commons-id-uuid.xml'. I checked the Apache Commons ID code and it tries to find the file from the classpath. Jetty's documentation states that WEB-INF/lib and WEB-INF/classes are in the classpath. The 'commons-id-uuid.xml' can be found from the deployed war file from the root of WEB-INF/classes directory but Jetty cannot load it: Message: java.lang.RuntimeException: java.lang.IllegalStateException: commons-id-uuid.xml loaded as system resource is null Jetty was started using the following command: mvn jetty:run -Dorg.apache.commons.id.uuid.config.resource.filename=commons-id-uuid.xml Any idea what is going wrong? We just need to generate UUID version 1 identifiers. Any suggestions?

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• Avoid generating empty STDOUT and STDERR files with Sun Grid Engine (SGE) and array jobs

  - by vy32

  I am running array jobs with Sun Grid Engine (SGE). My carefully scripted array job workers generate no stdout and no stderr when they function properly. Unfortunately, SGE insists on creating an empty stdout and stderr file for each run. Sun's manual states: STDOUT and STDERR of array job tasks will be written into dif- ferent files with the default location .['e'|'o']'.' In order to change this default, the -e and -o options (see above) can be used together with the pseudo-environment-vari- ables $HOME, $USER, $JOB_ID, $JOB_NAME, $HOSTNAME, and $SGE_TASK_ID. Note, that you can use the output redirection to divert the out- put of all tasks into the same file, but the result of this is undefined. I would like to have the output files suppressed if they are empty. Is there any way to do this?

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• WPF databinding update comboxbox2 based on selection change in combobox1 with MVVM

  - by cody

  I have a combo box that I have bound to a list that exists in my viewmodel. Now when a users makes a selection in that combo box I want a second combo box to update its content. So, for example, combobox1 is States and combobox2 should contain only the Zipcodes of that state. But in my case I don't have a predefined lists before hand for combobox2, I need to go fetch from a db. Also, if needed, I could get all the potential values for combobox2 (for each combobox1 value) before hand, but I'd like to avoiding that if I can. How do I implement in WPF and using MVVM? I'm fairly new to this whole wpf\databinding\mvvm world.

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• obj-c problem setting array with componentsSeperatedByString

  - by Brodie4598

  I have a data source with about 2000 lines that look like the following: 6712,Anaktuvuk Pass Airport,Anaktuvuk Pass,United States,AKP,PAKP,68.1336,-151.743,2103,-9,A What I am interested in is the 6th section of this string so I want to turn it into an array, then i want to check the 6th section [5] for an occurrance of that string "PAKP" Code: NSBundle *bundle = [NSBundle mainBundle]; NSString *airportsPath = [bundle pathForResource:@"airports" ofType:@"dat"]; NSData *data = [NSData dataWithContentsOfFile:airportsPath]; NSString *dataString = [[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding] autorelease]; NSArray *dataArray = [dataString componentsSeparatedByString:@"\n"]; NSRange locationOfAirport; NSString *workingString = [[NSString alloc]initWithFormat:@""]; NSString *searchedAirport = [[NSString alloc]initWithFormat:@""]; NSString *airportData = [[NSString alloc]initWithFormat:@""]; int d; for (d=0; d < [dataArray count]; d=d+1) { workingString = [dataArray objectAtIndex:d]; testTextBox = workingString; //works correctly NSArray *workingArray = [workingString componentsSeparatedByString:@","]; testTextBox2 = [workingArray objectAtIndex: 0]; //correctly displays the first section "6712" testTextBox3 = [workingArray objectAtIndex:1] //throws exception index beyond bounds locationOfAirport = [[workingArray objectAtIndex:5] rangeOfString:@"PAKP"]; } the problem is that when the workingArray populates, it only populates with a single object (the first component of the string which is "6712". If i have it display the workingString, it correctly displays the entire string, but for some reason, it isn't correctly making the array using the commas. i tried it without using the data file and it worked fine, so the problem comes from how I am importing the data. ideas?

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• Demystifying gcc under lpthreads

  - by Berkay

  in these i'm playing with thread library and trying to implement some functions. One of the tutorial says that to run the program use : gcc -lpthread -lrt -lc -lm project1.c scheduler.c -o out first of all i need deep understanding of what is gcc doing in each line, lpthread is used for what? what are the contributions of lrt -lc -lm ? project1.c and scheduler.c is compiled together so what should i understand? i checked the code and any of them not included in project1.c or scheduler.c. as an output clearly it gives "out". secondly the author states that to run the program you have to use ./out number filename (For example, ./out 2 sample.txt) To make these clear as far as i understand the main function gets number and sample.txt as an input.(?) thanks for your answers and making me clear.

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• What is the correct way to implement a massive hierarchical, geographical search for news?

  - by Philip Brocoum

  The company I work for is in the business of sending press releases. We want to make it possible for interested parties to search for press releases based on a number of criteria, the most important being location. For example, someone might search for all news sent to New York City, Massachusetts, or ZIP code 89134, sent from a governmental institution, under the topic of "traffic". Or whatever. The problem is, we've sent, literally, hundreds of thousands of press releases. Searching is slow and complex. For example, a press release sent to Queens, NY should show up in the search I mentioned above even though it wasn't specifically sent to New York City, because Queens is a subset of New York City. We may also want to implement "and" and "or" and negation and text search to the query to create complex searches. These searches also have to be fast enough to function as dynamic RSS feeds. I really don't know anything about search theory, or how it's properly done. The way we are getting by right now is using a data mart to store the locations the releases were sent to in a single table. However, because of the subset thing mentioned above, the data mart is gigantic with millions of rows. And we haven't even implemented cities yet, and there are about 50,000 cities in the United States, which will exponentially increase the size of the data mart by so much I'm afraid it just won't work anymore. Anyway, I realize this is not a simple question and there won't be a "do this" answer. However, I'm hoping one of you can point me in the right direction where I can learn about how massive searches are done? Because I really know nothing about it. And such a search engine is turning out to be incredibly difficult to make. Thanks! I know there must be a way because if Google can search the entire internet we must be able to search our own database :-)

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• setTimeout(fun) with a single argument

  - by Elazar Leibovich

  The HTML5 specifications states that setTimeout can be run without the additional "timeout" argument which is supposed to say after how many milliseconds will the function "handler" be scheduled. handle = window . setTimeout( handler [, timeout [, arguments ] ] ) Schedules a timeout to run handler after timeout milliseconds. Any arguments are passed straight through to the handler. However, I failed to find anywhere which explains what happens when no "timeout" time period is set. An example usage is, the animation implementation int the Raphael library. animationElements[length] && win.setTimeout(animation);

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