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• Qmake does not specify a valid qt

  - by Comptrol

  After installing Qt SDK for Open Source C++ development on Mac OS by following the respective steps Note for the binary package: If you have the binary package, simply double-click on the Qt.mpkg and follow the instructions to install Qt. . Yes, that is all I have done to install Qt on MacOsX. Everything was going fine, until I run a sample application, of which compile output resulted in: No valid Qt version set. Set one in Preferences Error while building project qtilk When executing build step 'QMake' Canceled build. Then I tried to change the respective Qt version in Preferences and I hovered over the Path, I realized my mkspec isn't set: Then I tried querying qmake by qmake -query : QT_INSTALL_PREFIX:/ QT_INSTALL_DATA:/usr/local/Qt4.6 QT_INSTALL_DOCS:/Developer/Documentation/Qt QT_INSTALL_HEADERS:/usr/include QT_INSTALL_LIBS:/Library/Frameworks QT_INSTALL_BINS:/Developer/Tools/Qt QT_INSTALL_PLUGINS:/Developer/Applications/Qt/plugins QT_INSTALL_TRANSLATIONS:/Developer/Applications/Qt/translations QT_INSTALL_CONFIGURATION:/Library/Preferences/Qt QT_INSTALL_EXAMPLES:/Developer/Examples/Qt/ QT_INSTALL_DEMOS:/Developer/Examples/Qt/Demos QMAKE_MKSPECS:/usr/local/Qt4.6/mkspecs QMAKE_VERSION:2.01a QT_VERSION:4.6.2 QMAKE_MKSPECS seems to be set here?? Will setting my mkspec solve my building problem? I tried setting by typing export mkspec=macx-g++. Still, mkspec seems not to be set to anything. I am all ears waiting for your answers. Thanks in advance.

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• Flex: View Stack Navigator

  - by Deena

  Hi, I have a component mxml file in which i have a view stack, on click of a button i navigate to the first child, now i need to navigate to the second child during onclick of a button present in the second child. All the childs are component files included within the view stack. How could this be done, Sample code is present below, --------------------Application.mxml--------------------- <mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml" > <mx:Script> <![CDATA[ private function loadScreen():void { navigationViewStack.selectedChild=id_offering; } ]]> </mx:Script> <mx:Button label="Save" click="loadScreen();"/> </mx:Canvas> <mx:ViewStack id="navigationViewStack" width="100%" height="100%"> <components:dashboard id="id_dashboard" label="Dashboard" /> <components:offering id="id_offering" label="Offering" /> <components:IssueSec id="id_issueSec" label = "Issues"/> </mx:ViewStack> -------------------------Ends-------------------------------------- Now in my offering.mxml file if i try to access navigationViewStack i am getting an error stating 'Access of undefined property navigationViewStack. Help me on how to access the view stack from my component mxml file. Thanks! Cheers, Deena

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• Model relationships in ASP.NET MVC

  - by Fabiano

  Hi I recently started evaluating ASP.NET MVC. While it is really easy and quick to create Controllers and Views for Models with only primitive properties (like shown in the starter videos from the official page) I didn't find any good way to work with references to complex types. Let's say, I have these Models: public class Customer { public int Id { get; set; } public string Name { get; set; } public Address Address { get; set; } public IList<Order> Orders { get; set; } } public class Address { public int Id { get; set; } public string ..... ..... } public class Order { public int Id { get; set; } public Customer Customer { get; set; } public string OrderName { get; set; } ..... } Note that I don't have foreign keys in the models (like it's typical for LINQ to SQL, which is also used in the sample video) but an object reference. How can I handle such references in asp.net mvc? Does someone has some good tips or links to tutorials about this problem? maybe including autobinding with complex types.

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• Using $.get with jquery validation

  - by Jimmy McCarthy

  I'm trying to use the Jquery builtin validator on my page. The issue is that I have certain fields that only are required if the JobID (entered into another field) does not already exist in our database. I have a simple service which simply takes JobID and returns True or False based on whether the JobID exists, but I can't seem to get this information where I want it. Some sample code: $("#dep_form").validate({ rules: { JobID: { required: true, digits: true, minlength: 3 }, OrgName: { required: function(element) { //This field is required if the JobID is new. return $("#jobinfo").html().length==15; } } }, messages: { JobID: { required: "Enter a Job Number.", digits: "Only numbers are allowed in Job ID's.", minlength: "Job Number must be at least 3 digits" }, OrgName: { required: "Select a Practice from the dropdown list." } }, errorClass: "ui-state-error-input", errorLabelContainer: "#errorbox", errorElement: 'li', errorContainer: "#validation_errors", onfocusout: false, onkeyup: false, focusinvalid: false }; Currently, I'm using a lazy method to validate (shown above). However, I now have access to a service using the URL: var lookupurl = "/deposits/jobidvalidate/?q=" + $("#id_JobID").val() + "&t=" + new Date().getTime(); which is a page which will contain just the word True or False based on whether that given JobID exists. I've tried half a dozen different ways of setting variables and calling functions within functions and still cannot get a way to simply return the value of that page (which I've been trying to access with $.get() ) to my validator, so that required is set to true when the Job does not exist and false if the job already exists. Any suggestions? Thanks.

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• Converting table columns to key value pairs

  - by TomD1

  I am writing a PL/SQL procedure that loads some data from Schema A into Schema B. They are both very different schemas and I can't change the structure of Schema B. Columns in various tables in Schema A (joined together in a view) need to be inserted into Schema B as key=value pairs in 2 columns in a table, each on a separate row. For example, an employee's first name might be present as employee.firstname in Schema A, but would need to be entered in Schema B as: id=>1, key=>'A123', value=>'Smith' There are almost 100 keys, with the potential for more to be added in future. This means I don't really want to hardcode any of these keys. Sample code: create table schema_a_employees ( emp_id number(8,0), firstname varchar2(50), surname varchar2(50) ); insert into schema_a_employees values ( 1, 'James', 'Smith' ); insert into schema_a_employees values ( 2, 'Fred', 'Jones' ); create table schema_b_values ( emp_id number(8,0), the_key varchar2(5), the_value varchar2(200) ); I thought an elegant solution would most likely involve a lookup table to determine what value to insert for each key, and doesn't involve effectively hardcoding dozens of similar statements like.... insert into schema_b_values ( 1, 'A123', v_firstname ); insert into schema_b_values ( 1, 'B123', v_surname ); What I'd like to be able to do is have a local lookup table in Schema A that lists all the keys from Schema B, along with a column that gives the name of the column in the table in Schema A that should be used to populate, e.g. key "A123" in Schema B should be populated with the value of the column "firstname" in Schema A, e.g. create table schema_a_lookup ( the_key varchar2(5), the_local_field_name varchar2(50) ); insert into schema_a_lookup values ( 'A123', 'firstname' ); insert into schema_a_lookup values ( 'B123', 'surname' ); But I'm not sure how I could dynamically use values from the lookup table to tell Oracle which columns to use. So my question is, is there an elegant solution to populate schema_b_values table with the data from schema_a_employees without hardcoding for every possible key (i.e. A123, B123, etc)? Cheers.

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• Core Data - Entity Relationships Not Working as expected

  - by slimms

  I have set up my data model in xcode like so EntityA AttA1 AttA2 EntityB AttB1 AttB2 AttB3 I then set up the relationships EntityA Name: rlpToEntityB Destination: EntityB Inverse: rlpToEntityA To Many: Checked EntityB Name: rlpToEntityA Destination: EntityA Inverse: rlpToEntityB To Many: UnChecked i.e. relationship between the two where Each one of EntityA can have many EntityB's It is my understanding that if i fetch a subset of EntityB's I can then retrieve the values for the related EntityA's. I have this working so that i can retrieve the EntityB values using NSManagedObject *objMO = [fetchedResultsController objectAtIndexPath:indexPath]; strValueFromEntityB = [objMO valueForKey:@"AttB1"]; However, if I try to retrieve a related value from EntityA by doing the following strValueFromEntityA = [objMO valueForKey:@"AttA1"]; I get the error "The entity EntityB is not Key value coding-compliant for the key Atta1" Not surprisingly i suppose if i switch things around to fetch from EntityA i cannot access attributes of EntityB So it appears the defined relationshipare being ignored. Can anyone spot what i am doing wrong? I confess im very new to iPhone programming and especially to Core Data so please go easy on me and provide verbose explanations or point me in the direction a specific resource. I have downloaded the apple sample apps (Core Data Books, Top Songs and recipes) but I still can't work this out. Thanks in advance, Nev.

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• Parsing tnsnames.ora using regex...

  - by Welton v3.50

  I am attempting to pull some information from my tnsnames file using regex. I started with the following pattern: MYSCHEMA *? = *?[\W\w\S\s]*\(HOST *?= *?(?<host>\w+\s?)\)\s?\(PORT *?= *?(?<port>\d+)\s?\)[\W\w\S\s]*\(SERVICE_NAME *?= *?(?<servicename>\w+)\s?\) which worked fine when MYSCHEMA was the only schema in the file, but when there are other schemas listed after MYSCHEMA it matches all the way to the last schema. I have since created a new pattern: MYSCHEMA *=\s*\(DESCRIPTION =\s*\(ADDRESS *= *\(PROTOCOL *= *TCP\)\(HOST *= *(?<host>\w+)\)\(PORT *= *(?<port>\d+)\)\)\s*\(CONNECT_DATA *=\s*(?<serverdedicated>\(SERVER *= *DEDICATED\))\s*\(SERVICE_NAME *= *(?<servicename>[\w\.]+) *\)\s*\)\s*\) This pattern matches MYSCHEMA only, but I had to add every element that appeared in MYSCHEMA entry, and it won't match MYOTHERSCHEMA if it does not contain all the same elements. Ideally, I'd like a pattern that matches MYSCHEMA entry only, and captures HOST, PORT and SERVICE NAME, and optionally (SERVER = DEDICATED) (which I didn't have in the first pattern) to named groups. Below is the sample tnsnames that I've been using for testing: SOMESCHEMA = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = REMOTEHOST)(PORT = 1234)) ) (CONNECT_DATA = (SERVICE_NAME = REMOTE) ) ) MYSCHEMA = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = MYHOST)(PORT = 1234)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = MYSERVICE.LOCAL ) ) ) MYOTHERSCHEMA = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = MYHOST)(PORT = 1234)) ) (CONNECT_DATA = (SERVICE_NAME = MYSERVICE.REMOTE) ) ) SOMEOTHERSCHEMA = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = LOCALHOST)(PORT = 1234)) ) (CONNECT_DATA = (SERVICE_NAME = LOCAL) ) )

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• Reading from a file, atoi() returns zero only on first element

  - by Nazgulled

  Hi, I don't understand why atoi() is working for every entry but the first one. I have the following code to parse a simple .csv file: void ioReadSampleDataUsers(SocialNetwork *social, char *file) { FILE *fp = fopen(file, "r"); if(!fp) { perror("fopen"); exit(EXIT_FAILURE); } char line[BUFSIZ], *word, *buffer, name[30], address[35]; int ssn = 0, arg; while(fgets(line, BUFSIZ, fp)) { line[strlen(line) - 2] = '\0'; buffer = line; arg = 1; do { word = strsep(&buffer, ";"); if(word) { switch(arg) { case 1: printf("[%s] - (%d)\n", word, atoi(word)); ssn = atoi(word); break; case 2: strcpy(name, word); break; case 3: strcpy(address, word); break; } arg++; } } while(word); userInsert(social, name, address, ssn); } fclose(fp); } And the .csv sample file is this: 900011000;Jon Yang;3761 N. 14th St 900011001;Eugene Huang;2243 W St. 900011002;Ruben Torres;5844 Linden Land 900011003;Christy Zhu;1825 Village Pl. 900011004;Elizabeth Johnson;7553 Harness Circle But this is the output: [900011000] - (0) [900011001] - (900011001) [900011002] - (900011002) [900011003] - (900011003) [900011004] - (900011004) What am I doing wrong?

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• even PHP has 'bugs' with IE

  - by silversky

  It's not a real bug BUT for sure it is not what you would expect. I have this sample code to upload images: <?php if($type=="image/jpg" || $type=="image/jpeg" || $type=="image/pjpeg" || $type=="image/tiff" || $type=="image/gif" || $type=="image/png") { // make upload else echo "Incorect format ...."; ?> The problem is that that if I modify the extention of an image, let's say to .jpgq or even .jpg% and i try to upload it FF and Chrome will say that the file"s type is "application/octet-stream" and normaly the condition will be false BUT since IE is 'smarter' that other brow. it will say that the file is "image/pjeg and the condition will be true and the file will be uploaded and of course latter any brow. will not be able to read / view the image. It is not a bug because on msdn.microsoft.com it says that: "If the "suggested" (server-provided) MIME type is unknown (not known and not ambiguous), FindMimeFromData immediately returns this MIME type" and "If the server-provided MIME type is either known or ambiguous, the buffer is scanned in an attempt to verify or obtain a MIME type from the actual content." plus others 'inovative solutions from Microsoft'. SO my questions are: Why is IE so 'smart' and when I upload the file to server it knows the real MIME type BUT it will fail to read it from the server ? How can i work around this issue (if the file doesn't have the right extention the condition has to be false)? Is it wise to check the extention format (and not the MIME type)? is any of the above extention not recomended to use ? Should I add others?

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• rs232 communication, general timing question

  - by Sunny Dee

  Hi, I have a piece of hardware which sends out a byte of data representing a voltage signal at a frequency of 100Hz over the serial port. I want to write a program that will read in the data so I can plot it. I know I need to open the serial port and open an inputstream. But this next part is confusing me and I'm having trouble understanding the process conceptually: I create a while loop that reads in the data from the inputstream 1 byte at a time. How do I get the while loop timing so that there is always a byte available to be read whenever it reaches the readbyte line? I'm guessing that I can't just put a sleep function inside the while loop to try and match it to the hardware sample rate. Is it just a matter of continuing reading the inputstream in the while loop, and if it's too fast then it won't do anything (since there's no new data), and if it's too slow then it will accumulate in the inputstream buffer? Like I said, i'm only trying to understand this conceptually so any guidance would be much appreciated! I'm guessing the idea is independent of which programming language I'm using, but if not, assume it is for use in Java. Thanks!

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• How to use EffectUpdate?

  - by coma

  So, this is my sample: <?xml version="1.0" encoding="utf-8"?> <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:mx="library://ns.adobe.com/flex/mx" xmlns:s="library://ns.adobe.com/flex/spark"> <fx:Style> @namespace s "library://ns.adobe.com/flex/spark"; @namespace mx "library://ns.adobe.com/flex/mx"; s|Application { background-color: #333333; } #info { padding-top: 5; padding-right: 5; padding-bottom: 5; padding-left: 5; font-size: 22; background-color: #ffffff; } #plane { corner-radius: 8; background-color: #1c1c1c; } </fx:Style> <fx:Script> import mx.events.*; private var steps:uint = 0; private function effectUpdateHandler(event:EffectEvent):void { info.text = "rotationY: " + plane.rotationY + " ; steps: " + steps; steps++; } </fx:Script> <fx:Declarations> <s:Rotate3D id="spin" target="{plane}" autoCenterTransform="true" angleYFrom="0" angleYTo="360" repeatCount="10" effectUpdate="effectUpdateHandler(event)" /> </fx:Declarations> <s:VGroup horizontalAlign="center" gap="50" width="100%"> <s:Label id="info" width="100%"/> <s:BorderContainer id="plane" width="200" height="200" click="spin.play()"/> </s:VGroup> </s:Application> and it doesn't make me happy.

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• jitter if multiple outliers in ggplot2 boxplot

  - by Andreas

  I am trying to find a suitable display to illustrate various properties within and across school classes. For each class there is only 15-30 data points (pupils). Right now i am leaning towards a whisker-less boxplot, showing only 1.,2. and 3. quartile + datapoints more then e.g. 1 population SD +/- the sample median. This I can do. However - I need to show this graph to some teachers, in order to gauge what they like most. I'd like to compare my graph with a normal boxplot. But the normal boxplot looks the same if there is only one outlier, or e.g. 5 outliers at the same value. In this case this would be a deal-breaker. e.g. test <-structure(list(value = c(3, 5, 3, 3, 6, 4, 5, 4, 6, 4, 6, 4, 4, 6, 5, 3, 3, 4, 4, 4, 3, 4, 4, 4, 3, 4, 5, 6, 6, 4, 3, 5, 4, 6, 5, 6, 4, 5, 5, 3, 4, 4, 6, 4, 4, 5, 5, 3, 4, 5, 8, 8, 8, 8, 9, 6, 6, 7, 6, 9), places = structure(c(1L, 2L, 1L, 1L, 1L, 2L, 1L, 2L, 1L, 2L, 1L, 2L, 2L, 2L, 2L, 2L, 1L, 1L, 2L, 2L, 2L, 1L, 2L, 1L, 1L, 1L, 1L, 2L, 1L, 2L, 1L, 2L, 2L, 2L, 1L, 2L, 1L, 2L, 2L, 1L, 1L, 2L, 2L, 1L, 1L, 1L, 1L, 2L, 1L, 1L, 2L, 2L, 2L, 1L, 1L, 2L, 2L, 1L, 2L, 1L), .Label = c("a", "b"), class = "factor")), .Names = c("value", "places"), row.names = c(NA, -60L), class = "data.frame") ggplot(test, aes(x=places,y=value))+geom_boxplot() Here there are two outliers at ("a",9) - but only one "dot" shown. So my question: How to jitter the outliers. And - what kind of display would you suggest for this kind of data?

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• JQuery Tool tips

  - by kwek-kwek

  I want to create a tool tip for an image with a link now I had it working one but it doesn't work with the 2nd image. Here is my Sample Code: <!-- trigger element. a regular workable link --> <a id="test" title="Name - Title">Name</a> <!-- tooltip element --> <div class="tooltip"> <div><span class="name">Name</span><br /> Title <span><a href="#">more info»</a></span></div> </div> <!-- trigger element. a regular workable link --> <a id="test2" title="Name - Title">Name</a> <!-- tooltip element --> <div class="tooltip2"> <div><span class="name">Name</span><br /> Title <span><a href="#">more info»</a></span></div> </div> and here is my script that makes it all happens: <script> // What is $(document).ready ? See: http://flowplayer.org/tools/using.html#document_ready $(document).ready(function() { // enable tooltip for "test" element. use the "slide" effect $("#test").tooltip({ effect: 'slide', offset: [50, 40] }); $("#test2").tooltip2({ effect: 'slide', offset: [50, 40] }); }); </script> but not working please help.

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• How to set the position of a sprite within a box2d body?

  - by Frank

  Basically I have 2 polygons for my body. When I add a sprite for userData, the position of the texture isn't where I want it to be. What I want to do is adjust the position of the texture within the body. Here's the code sample of where I am setting this: CCSpriteSheet *sheet = (CCSpriteSheet*) [self getChildByTag:kTagSpriteSheet]; CCSprite *pigeonSprite = [CCSprite spriteWithSpriteSheet:sheet rect:CGRectMake(0,0,40,32)]; [sheet addChild:pigeonSprite z:0 tag:kPigeonSprite]; pigeonSprite.position = ccp( p.x, p.y); bodyDef.position.Set(p.x/PTM_RATIO, p.y/PTM_RATIO); bodyDef.userData = sprite; b2Body *body = world->CreateBody(&bodyDef); b2CircleShape dynamicCircle; dynamicCircle.m_radius = .25f; dynamicCircle.m_p.Set(0.0f, 1.0f); // Define the dynamic body fixture. b2FixtureDef circleDef; circleDef.shape = &dynamicCircle; circleDef.density = 1.0f; circleDef.friction = 0.3f; body->CreateFixture(&circleDef); b2Vec2 vertices[3]; vertices[0].Set(-0.5f, 0.0f); vertices[1].Set(0.5f, 0.0f); vertices[2].Set(0.0f, 1.0f); b2PolygonShape triangle; triangle.Set(vertices, 3); b2FixtureDef triangleDef1; triangleDef1.shape = &triangle; triangleDef1.density = 1.0f; triangleDef1.friction = 0.3f; body->CreateFixture(&triangleDef1);

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• Word VBA - Find text between delimiters and convert to lower case

  - by jJack

  I would like to find text which is between the < and characters, and then turn any found text into "normal" case, where first letter of word is capitalized. Here is what I have thus far: Function findTextBetweenCarots() As String Dim strText As String With Selection .Find.Text = "<" ' what about <[^0-9]+> ? .Find.Forward = True .Find.Wrap = wdFindContinue End With Selection.Find.Execute ' Application.Selection. ' how do I get the text between the other ">"? findCarotSymb = Application.Selection.Text End Function Or, is there a better way of doing this? I also approached the problem using the VBScript Regex 5.5 library, which worked on simple documents, but not on certain documents with complex tables. For example, trying to just bold the text (for simplicity): Sub BoldUpperCaseWords() Dim regEx, Match, Matches Dim rngRange As Range Set regEx = New RegExp regEx.Pattern = "<[^0-9]+>" regEx.IgnoreCase = False regEx.Global = True Set Matches = regEx.Execute(ActiveDocument.Range.Text) For Each Match In Matches ActiveDocument.Range(Match.FirstIndex, Match.FirstIndex + Len(Match.Value)).Bold = True Next End Sub would not work in a document with tables. In fact, it would not even bold the correct text (the text between the <. This leads me to believe I have a broader issue here that I am missing. Here is what a sample doc looks like. Notice the wrong text is bold:

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• IUsable: controlling resources in a better way than IDisposable

  - by Ilya Ryzhenkov

  I wish we have "Usable" pattern in C#, when code block of using construct would be passed to a function as delegate: class Usable : IUsable { public void Use(Action action) // implements IUsable { // acquire resources action(); // release resources } } and in user code: using (new Usable()) { // this code block is converted to delegate and passed to Use method above } Pros: Controlled execution, exceptions The fact of using "Usable" is visible in call stack Cons: Cost of delegate Do you think it is feasible and useful, and if it doesn't have any problems from the language point of view? Are there any pitfalls you can see? EDIT: David Schmitt proposed the following using(new Usable(delegate() { // actions here }) {} It can work in the sample scenario like that, but usually you have resource already allocated and want it to look like this: using (Repository.GlobalResource) { // actions here } Where GlobalResource (yes, I know global resources are bad) implements IUsable. You can rewrite is as short as Repository.GlobalResource.Use(() => { // actions here }); But it looks a little bit weird (and more weird if you implement interface explicitly), and this is so often case in various flavours, that I thought it deserve to be new syntactic sugar in a language.

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• Adding a dynamic image to UITable View Cell

  - by Graeme

  Hi, I have a table in which I want a dynamic image to load in at the left-hand side. The table needs to use an IF statement to select the appropriate image from the "Resources" folder, and needs to be based upon [dog types]. The [dog types] is extracted from an RSS feed, and so the image in the table cell needs to match the each cell's [dog types] tag. Update: See code below for what I'm looking to do (only below it's for earthquakes, for me its pictures of dogs). I suspect I need to use - (UIImage *)imageForTypes:(NSString *)types { to do such a thing. Thanks. Updated code: This is for Apple's Earthquake sample but does exactly what I need to do. It matches images to the severity (2.0, 3.0, 4.0, 5.0 etc.) of every earthquake to the magnitude. - (UIImage *)imageForMagnitude:(CGFloat)magnitude { if (magnitude >= 5.0) { return [UIImage imageNamed:@"5.0.png"]; } if (magnitude >= 4.0) { return [UIImage imageNamed:@"4.0.png"]; } if (magnitude >= 3.0) { return [UIImage imageNamed:@"3.0.png"]; } if (magnitude >= 2.0) { return [UIImage imageNamed:@"2.0.png"]; } return nil; } and under - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath magnitudeImage.image = [self imageForMagnitude:earthquake.magnitude];

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• Wrong chapter number on page headers except first page

  - by okhalid

  Hi, I am writing up my thesis in Latex and have a template. It works nicely for every thing else except one. Chapter numbers are correctly incremented on the first page of each chapter but for consecutive pages of each chapter, the header saying "Chapter x - This is a chapter title" have 1 always as chapter number. Following is the code sample from the CLS file which i think is relevant to the headers: \newcommand\btypeout[1]{\bhrule\typeout{\space #1}\bhrule} \def\today{\ifcase\month\or January\or February\or March\or April\or May\or June\or July\or August\or September\or October\or November\or December\fi \space \number\year} \usepackage{setspace} \onehalfspacing \setlength{\parindent}{0pt} \setlength{\parskip}{2.0ex plus0.5ex minus0.2ex} \usepackage{vmargin} \setmarginsrb { 1.5in} % left margin { 0.6in} % top margin { 1.0in} % right margin { 0.8in} % bottom margin { 20pt} % head height {0.25in} % head sep { 9pt} % foot height { 0.3in} % foot sep \raggedbottom \setlength{\topskip}{1\topskip \@plus 5\p@} \doublehyphendemerits=10000 % No consecutive line hyphens. \brokenpenalty=10000 % No broken words across columns/pages. \widowpenalty=9999 % Almost no widows at bottom of page. \clubpenalty=9999 % Almost no orphans at top of page. \interfootnotelinepenalty=9999 % Almost never break footnotes. \usepackage{fancyhdr} \lhead[\rm\thepage]{\fancyplain{}{\sl{\rightmark}}} \rhead[\fancyplain{}{\sl{\leftmark}}]{\rm\thepage} \chead{}\lfoot{}\rfoot{}\cfoot{} \pagestyle{fancy} %% Chapter Heading --------------- \renewcommand{\chaptermark}[1]{\btypeout{\thechapter\space #1}\markboth{\@chapapp\ \thechapter\ #1}{\@chapapp\ \thechapter\ #1}} %%-------------------------------------------------- \renewcommand{\sectionmark}[1]{} \renewcommand{\subsectionmark}[1]{} \def\cleardoublepage{\clearpage\if@twoside \ifodd\c@page\else \hbox{} \thispagestyle{empty} \newpage \if@twocolumn\hbox{}\newpage\fi\fi\fi} Thanks, Omer

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• Attempted to read or write protected memory

  - by Interfector

  I have a sample ASP.NET MVC 3 web application that is following Jonathan McCracken's Test-Drive Asp.NET MVC (great book , by the way) and I have stumbled upon a problem. Note that I'm using MVCContrib, Rhino and NUnit. [Test] public void ShouldSetLoggedInUserToViewBag() { var todoController = new TodoController(); var builder = new TestControllerBuilder(); builder.InitializeController(todoController); builder.HttpContext.User = new GenericPrincipal(new GenericIdentity("John Doe"), null); Assert.That(todoController.Index().AssertViewRendered().ViewData["UserName"], Is.EqualTo("John Doe")); } The code above always throws this error: System.AccessViolationException : Attempted to read or write protected memory. This is often an indication that other memory is corrupt. The controller action code is the following: [HttpGet] public ActionResult Index() { ViewData.Model = Todo.ThingsToBeDone; ViewBag.UserName = HttpContext.User.Identity.Name; return View(); } From what I have figured out, the app seems to crash because of the two assignements in the controller action. However, I cannot see how there are wrong!? Can anyone help me pinpoint the solution to this problem. Thank you.

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• How to make designer generated .Net application settings portable

  - by Ville Koskinen

  Hello, I've been looking at modifying the source of the Doppler podcast aggregator with the goal of being able to run the program directly from my mp3 player. Doppler stores application settings using a Visual Studio designer generated Settings class, which by default serializes user settings to the user's home directory. I'd like to change this so that all settings would be stored in the same directory as the exe. It seems that this would be possible by creating a custom provider class which inherits the SettingsProvider class. Has anyone created such a provider and would like to share code? Update: I was able to get a custom settings provider nearly working by using this MSDN sample, i.e. with simple inheritance. I was initially confused as Windows Forms designer stopped working until I did this trick suggested at Codeproject: internal sealed partial class Settings { private MySettingsProvider settingsprovider = new MySettingsProvider(); public Settings() { foreach (SettingsProperty property in this.Properties) { property.Provider = settingsprovider; } ... The program still starts with window size 0;0 though. Anyone with any insight to this? Why the need to assing the provider in runtime---instead of using attributes as suggested by MSDN? Why the changes in how the default settings are passed to the application with the default settings provider vs. the custom one?

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• Documentation for java.util.concurrent.locks.ReentrantReadWriteLock

  - by Andrei Taptunov

  Disclaimer: I'm not very good at Java and just comparing read/writer locks between C# and Java to understand this topic better & decisions behind both implementations. There is JavaDoc about ReentrantReadWriteLock. It states the following about upgrade/downgrade for locks: Lock downgrading ... However, upgrading from a read lock to the write lock is not possible. It also has the following example that shows manual upgrade from read lock to write lock: // Here is a code sketch showing how to exploit reentrancy // to perform lock downgrading after updating a cache void processCachedData() { rwl.readLock().lock(); if (!cacheValid) { // upgrade lock manually #1: rwl.readLock().unlock(); // must unlock first to obtain writelock #2: rwl.writeLock().lock(); if (!cacheValid) { // recheck ... } ... } use(data); rwl.readLock().unlock(); Does it mean that actually the sample from above may not behave correctly in some cases - I mean there is no lock between lines #1 & #2 and underlying structure is exposed to changes from other threads. So it can not be considered as the correct way to upgrade the lock or do I miss something here?

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• Stock management of assemblies and its sub parts (relations)

  - by The Disintegrator

  I have to track the stock of individual parts and kits (assemblies) and can't find a satisfactory way of doing this. Sample bogus and hyper simplified database: Table prod: prodID 1 prodName Flux capacitor prodCost 900 prodPrice 1350 (900*1.5) prodStock 3 - prodID 2 prodName Mr Fusion prodCost 300 prodPrice 600 (300*2) prodStock 2 - prodID 3 prodName Time travel kit prodCost 1650 (1350+300) prodPrice 2145 (1650*1.3) prodStock 2 Table rels relID 1 relSrc 1 (Flux capacitor) relType 4 (is a subpart of) relDst 3 (Time travel kit) - relID 2 relSrc 2 (Mr Fusion) relType 4 (is a subpart of) relDst 3 (Time travel kit) prodPrice: it's calculated based on the cost but not in a linear way. In this example for costs of 500 or less, the markup is a 200%. For costs of 500-1000 the markup is 150%. For costs of 1000+ the markup is 130% That's why the time travel kit is much cheaper than the individual parts prodStock: here is my problem. I can sell kits or the individual parts, So the stock of the kits is virtual. The problem when I buy: Some providers sell me the Time Travel kit as a whole (with one barcode) and some sells me the individual parts (with a different barcode) So when I load the stock I don't know how to impute it. The problem when I sell: If I only sell kits, calculate the stock would be easy: "I have 3 Flux capacitors and 2 Mr Fusions, so I have 2 Time travel kits and a Flux Capacitor" But I can sell Kits or individual parts. So, I have to track the stock of the individual parts and the possible kits at the same time (and I have to compensate for the sell price) Probably this is really simple, but I can't see a simple solution. Resuming: I have to find a way of tracking the stock and the database/program is the one who has to do it (I cant ask the clerk to correct the stock) I'm using php+MySql. But this is more a logical problem than a programing one

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• Python script, runs well, but not perfectly, debugging help.

  - by S1syphus

  What it does (sort of)... or is meant to, the script reads from a csv file that contains information on sound files and create a play list exactly 60 minutes long. An example csv, contains: their title, duration (in seconds), minium total time to be played (in minutes) An example is: Soundfoo,120,10 Soundbar,30,6 Sounddev,60,20 Soundrandom,15,8 The script works out the minimum instances of plays, take 'Soundfoo' for example, the length of each sample is 120 seconds and the minimum time to be played is 10 minutes, so basic maths 10*60/120 gives the number of instances the song is to be played, in this case 5. It is meant to take minimum number of instances and spread out equally from each other; so there will never be a period where for example Soundbar is played twice in a row. Then if the minium instances of each song has been used, and there is still time with in the 60 min, how is it possible to tell it to go back and fill the time by selecting each sound and including it till the 60 min is filled while remaining sparsely populated. Heres the issue(s)! The script fails to calculate the actual time require to play all the sounds in a file and the total time of the playlist, the thing is tho it doesn't get it wrong all the time maybe 3/5 times, even if I run it on the same csv file it will give me different answers. Here is the file I shall run the script on e for sake of ease to see the issue: Sound1,60,10 Sound2,60,10 Sound3,60,10 Sound4,60,10 Sound5,60,10 Sound6,60,10 I'll do it three times and post the results: 1 Required playtime in minutes: 60 Actual time in minutes to play all required ads: 62 Total playtime in minutes: 62.0 2 Required playtime in minutes: 60 Actual time in minutes to play all required ads: 71 Total playtime in minutes: 71.0 3 Required playtime in minutes: 60 Actual time in minutes to play all required ads: 60 Total playtime in minutes: 60.0 Relevant Code: pastebin.com/demkBXk6 And finally... in context: http://pastebin.com/demkBXk6 If you made it down to here, thanks for staying and reading, kudos.

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• JConsole does not connect when a program (running in eclipse) is waiting for a console input

  - by Calm Storm

  Hi, I have a problem similar to the one mentioned here. I have a program which launches a selenium browser and refreshes it every 2 seconds. My idea here was to monitor the memory usage of my application as the page is being hit. This console program does a "System.in.read" and when a user presses enter key, this stops the browser refresh thread. I run the program and it runs as I would expect it to. But when I fire jconsole and attach it to the process, it looks like jconsole waits forever to attach. This is because of the "System.in.read", apparently as shown in the JConsole source. In my code it makes perfect sense for me to terminte the browser when user presses something so is there any alternative available at all ? (Posted code sample below) package com.ekanathk; import java.util.ArrayList; import java.util.List; import org.junit.Test; public class MultiThread { @Test public void testSimple() throws Exception { List<Integer> x = new ArrayList<Integer>(); for(int i = 0; i < 1000; i++) { x.add(i); } System.out.print("Press Enter to stop (try attach a jconsole now...."); System.in.read(); } } The problem here seems to be that any System.in.read (either in Main thread or any threads) seems to completely block jconsole. I guess the problem essentially boils down to multiple threads requesting system inputs at the same time? Is there a solution ? UPDATE 1: It seems this works fine when launching the class from a command line, however when I run from eclipse, jconsole cant connect. Any reasons ?

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• SHLoadImageFile(L"\\Program Files\\TrainingApp\\background.png"); whats that L in the argument for?

  - by ashishsony

  Hi, ive been working on c++ on linux for the past 2 years,and switched to windows c++ programming recently. can anyone tell me what that L is there in the argument of the function: SHLoadImageFile(L"\\Program Files\\TrainingApp\\background.png"); and on viewing certain sample code in MSVS C++ i came across hundereds of typedefs like.. LPARAM// typedef LONG_PTR LPARAM... here LONG_PTR is again typedef as __w64 long WPARAM// typedef UINT_PTR WPARAM... so there is a lot of chained typedefs.. I never saw this much of typedef chaining on c++ programming on linux using gcc.. what i want to say is that it just creates more confusion in this way for windows application programming.. while ive seen application programming on linux using frameworks like Qt.. there such things are rarely used.. so is there specific purpose in typedefining again and again on MSVSC++?? for eg.. there are typdefs like typedef int BOOL; whats the use of this when normal bool is available already..?? there are hundred other cases ive come across where just to decide what data type to use becomes so difficult.. it becomes difficult to understand a pre written code in this fashion too.. Thanks.

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