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  • Typecast cross-platform compatibility

    - by kaykun
    Hi, what I'm trying to do is append a binary integer into a string object. So far I have this: int number = 5; cppstring.append((char*)&number, 4); It works fine on a x86 system with Windows, but some people are saying its not cross-platform and is unsafe. What is the preferred method to do this?

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  • How to do multiple column UniqueConstraint in hbm?

    - by DataSurfer
    Working on some legacy hibernate code. How do I do the following with hbm.xml(hibernate mapping file) instead of with annotations? @Table(name="users", uniqueConstraints = { @UniqueConstraint(columnNames={"username", "client"}), @UniqueConstraint(columnNames={"email", "client"}) }) public class User implements Serializable { private static final long serialVersionUID = 1L; @Id private int id; private String username; private String email; private Client client; }

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  • How to deprecate a macro in GCC?

    - by Eric
    Hi, i Know how to use attribute deprecated to deprcate a function like this: int old_fn () __attribute__ ((deprecated)); But how to deprecate a Macro like this: #define OLD_MACRO 1 Thank you in advance. Eric

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  • Parsing XML wont display all items.

    - by Nauman A
    I have this code but the toast wont display any message what is wrong with my code.. I can get the value from link, linknext but title wont bring out any value. ( I am not very bright with writing code so please suggest anything you may feel like. final Button button = (Button) findViewById(R.id.Button01); button.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { // Perform action on click try { URL url = new URL( "http://somelink.com=" + Link.setFirst_link); DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); DocumentBuilder db = dbf.newDocumentBuilder(); Document doc = db.parse(new InputSource(url.openStream())); doc.getDocumentElement().normalize(); NodeList nodeList = doc.getElementsByTagName("item"); /** Assign textview array lenght by arraylist size */ for (int i = 0; i < nodeList.getLength(); i++) { Node node = nodeList.item(i); Element fstElmnt = (Element) node; NodeList nameList = fstElmnt.getElementsByTagName("link"); Element nameElement = (Element) nameList.item(0); nameList = nameElement.getChildNodes(); String img = (((Node) nameList.item(0)).getNodeValue()); NodeList websiteList = fstElmnt.getElementsByTagName("linknext"); Element websiteElement = (Element) websiteList.item(0); websiteList = websiteElement.getChildNodes(); String nextlink = (((Node) websiteList.item(0)).getNodeValue()); Link.setFirst_link = nextlink; Drawable drawable = LoadImageFromWebOperations(img); imgView.setImageDrawable(drawable); NodeList titleList = fstElmnt.getElementsByTagName("title"); Element titleElement = (Element) titleList.item(0); websiteList = titleElement.getChildNodes(); String title = (((Node) titleList.item(0)).getNodeValue()); Context context = getApplicationContext(); CharSequence text = title; int duration = Toast.LENGTH_SHORT; Toast toast = Toast.makeText(context, text, duration); toast.show(); } } catch (Exception e) { System.out.println("XML Pasing Excpetion = " + e); } } }); /** Set the layout view to display */ } Here is the xml file <?xml version="1.0"?> <maintag> <item> <link>http://image.com/357769.jpg?40</link> <linknext>http://www.image.com</linknext> <title>imagename</title> </item> </maintag>

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  • What (tf) are the secrets behind PDF memory allocation (CGPDFDocumentRef)

    - by Kai
    For a PDF reader I want to prepare a document by taking 'screenshots' of each page and save them to disc. First approach is CGPDFDocumentRef document = CGPDFDocumentCreateWithURL((CFURLRef) someURL); for (int i = 1; i<=pageCount; i++) { NSAutoreleasePool *pool = [[NSAutoreleasePool alloc]init]; CGPDFPageRef page = CGPDFDocumentGetPage(document, i); ...//getting + manipulating graphics context etc. ... CGContextDrawPDFPage(context, page); ... UIImage *resultingImage = UIGraphicsGetImageFromCurrentImageContext(); ...//saving the image to disc [pool drain]; } CGPDFDocumentRelease(document); This results in a lot of memory which seems not to be released after the first run of the loop (preparing the 1st document), but no more unreleased memory in additional runs: MEMORY BEFORE: 6 MB MEMORY DURING 1ST DOC: 40 MB MEMORY AFTER 1ST DOC: 25 MB MEMORY DURING 2ND DOC: 40 MB MEMORY AFTER 2ND DOC: 25 MB .... Changing the code to for (int i = 1; i<=pageCount; i++) { CGPDFDocumentRef document = CGPDFDocumentCreateWithURL((CFURLRef) someURL); NSAutoreleasePool *pool = [[NSAutoreleasePool alloc]init]; CGPDFPageRef page = CGPDFDocumentGetPage(document, i); ...//getting + manipulating graphics context etc. ... CGContextDrawPDFPage(context, page); ... UIImage *resultingImage = UIGraphicsGetImageFromCurrentImageContext(); ...//saving the image to disc CGPDFDocumentRelease(document); [pool drain]; } changes the memory usage to MEMORY BEFORE: 6 MB MEMORY DURING 1ST DOC: 9 MB MEMORY AFTER 1ST DOC: 7 MB MEMORY DURING 2ND DOC: 9 MB MEMORY AFTER 2ND DOC: 7 MB .... but is obviously a step backwards in performance. When I start reading a PDF (later in time, different thread) in the first case no more memory is allocated (staying at 25 MB), while in the second case memory goes up to 20 MB (from 7). In both cases, when I remove the CGContextDrawPDFPage(context, page); line memory is (nearly) constant at 6 MB during and after all preparations of documents. Can anybody explain whats going on there?

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  • Sorting a NSArray

    - by Yoot
    Hi, I have a NSArray of objects. Those objects have an int attribute called "distance". I would like to sort my array by distance. Could someone please tell me how to do that ? I can't understand how the sortUsingSelector or sortUsingDescriptor methods are working... Thanks

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  • How to check whether the tab is active or not in JTabbedPane?

    - by Supereme
    Hi, How to check whether a tab in JTabbedPane instance is active or not, in the class of the tab(nested class) itself and not in the enclosing class? I know that there is a method 'booloean isEnabledAt(int index)'; but this method can only be called in the enclosing class whereas I want to check whether the tab is currently selected or not in the tab class (nested class) itself. Can anybody please suggest me something? Thank you!

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  • Grails/Hibernate max for string type

    - by bsreekanth
    Hello, In my table I have a serial number field, which is represneted by string.. It has a prefix and some numbers follow. Eg: ABC1234, ABC2345 etc. How to retrieve the largest value (max equivalent of int type) from this column. In my case it would be ABC2345. I probably could retrieve all the data,, sort it and get the same, but that would be slow. thanks in advance..

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  • UNIX pipes on C block on read

    - by Toni Cárdenas
    I'm struggling to implement a shell with pipelines for class. typedef struct { char** cmd; int in[2]; int out[2]; } cmdio; cmdio cmds[MAX_PIPE + 1]; Commands in the pipeline are read and stored in cmds. cmdio[i].in is the pair of file descriptors of the input pipe returned by pipe(). For the first command, which reads from terminal input, it is just {fileno(stdin), -1}. cmdin[i].outis similar for the output pipe/terminal output. cmdio[i].in is the same as cmd[i-1].out. For example: $ ls -l | sort | wc CMD: ls -l IN: 0 -1 OUT: 3 4 CMD: sort IN: 3 4 OUT: 5 6 CMD: wc IN: 5 6 OUT: -1 1 We pass each command to process_command, which does a number of things: for (cmdi = 0; cmds[cmdi].cmd != NULL; cmdi++) { process_command(&cmds[cmdi]); } Now, inside process_command: if (!(pid_fork = fork())) { dup2(cmd->in[0], fileno(stdin)); dup2(cmd->out[1], fileno(stdout)); if (cmd->in[1] >= 0) { if (close(cmd->in[1])) { perror(NULL); } } if (cmd->out[0] >= 0) { if (close(cmd->out[0])) { perror(NULL); } } execvp(cmd->cmd[0], cmd->cmd); exit(-1); } The problem is that reading from the pipe blocks forever: COMMAND $ ls | wc Created pipe, in: 5 out: 6 Foreground pid: 9042, command: ls, Exited, info: 0 [blocked running read() within wc] If, instead of exchanging the process with execvp, I just do this: if (!(pid_fork = fork())) { dup2(cmd->in[0], fileno(stdin)); dup2(cmd->out[1], fileno(stdout)); if (cmd->in[1] >= 0) { if (close(cmd->in[1])) { perror(NULL); } } if (cmd->out[0] >= 0) { if (close(cmd->out[0])) { perror(NULL); } } char buf[6]; read(fileno(stdin), buf, 5); buf[5] = '\0'; printf("%s\n", buf); exit(0); } It happens to work: COMMAND $ cmd1 | cmd2 | cmd3 | cmd4 | cmd5 Pipe creada, in: 11 out: 12 Pipe creada, in: 13 out: 14 Pipe creada, in: 15 out: 16 Pipe creada, in: 17 out: 18 hola! Foreground pid: 9251, command: cmd1, Exited, info: 0 Foreground pid: 9252, command: cmd2, Exited, info: 0 Foreground pid: 9253, command: cmd3, Exited, info: 0 Foreground pid: 9254, command: cmd4, Exited, info: 0 hola! Foreground pid: 9255, command: cmd5, Exited, info: 0 What could be the problem?

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  • What is the best way to declare sorted association in grails domain classes ?

    - by fabien7474
    It seems that there are two different ways of declaring sorted associations in Grails : Method 1 (see here) using default sort order class Book { String title } class Author { static hasMany = [books : Book] static mapping = { books sort: "title"} } Method 2 (see here) using SortedSet class Book implements Comparable { String title int compareTo(obj) { title <=> obj.title } } class Author { SortedSet books static hasMany = [books : Book] } I am not sure which one to use and what is the difference (if any), pros and cons between using one against the other. I would appreciate any clarification. Thank you

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  • Why Silverlight Mediaplayer (Not MedieElement) doesn't have a next Button?

    - by Subhen
    Hi, I try implementing silverlight mediaPlayer that is available from expression blend int my projecct. Just found out that there is no next buttom for the Media Player. So I have to override the button proporties in the onApplyTemplate(). Am I missing something so that I am not able to enable the Next and Prev Button or this is just the Silverlight MediaPlayer it self. Thanks, Subhen

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  • Mock dll methods for unit tests

    - by sanjeev40084
    I am trying to write a unit test for a method, which has a call to method from dll. Is there anyway i can mock the dll methods so that i can unit test? public string GetName(dllobject, int id) { var eligibileEmp = dllobject.GetEligibleEmp(id); <---------trying to mock this method if(eligibleEmp.Equals(empValue) { .......... } }

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  • how to set setEnabled: for NSButton in an NSTableView

    - by user460366
    Hi All I have an NSTableView which has three columns. The first one is a checkbox and the third one is a button. The button 'is enabled' state depends on whether or not the checkbox is checked. I am setting the table content in the awakeFromNib method and I am implementing the checkbox state in the - (id)tableView:(NSTableView *)tableView objectValueForTableColumn:(NSTableColumn *)tableColumn row:(int)row method. I need to find a way setEnabled: for the NSButton Thanks

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  • xcode - defining integer variables

    - by Mike
    If I have #define myVariable 10 and later I use this as in [self doSomething:myVariable]; Supposing doSomethign method is like - (void) doSomething:(int)myNumber; I receive a warning telling me that a "]" is expected before the ";" why is that and how to solve this? thanks for any help.

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  • c++ compile error

    - by Niranjan
    Hi, I am trying to develop abstract design pattern code for one of my project as below.. But, I am not able to compile the code ..giving some compile errors(like "conversion from 'ProductA1 *' to 'ProductA *' exists, but is inaccessible" ).. Can any one please help me out in this... #include "stdafx.h" #include <iostream> using namespace std; class ProductA { public: virtual void Operation1()=0; virtual void Operation2()=0; }; class ProductA1 : ProductA { public: virtual void Operation1() {cout<<"PD ProductA1 Operation1"<<endl; } virtual void Operation2() {cout<<"PD ProductA1 Operation2"<<endl; } }; class ProductA2 : ProductA { public: virtual void Operation1() {cout<<"DT ProductA2 Operation1"<<endl; } virtual void Operation2() {cout<<"DT ProductA2 Operation2"<<endl; } }; //------------------------------------------------------------- class ProductB { public: virtual void Operation3()=0; virtual void Operation4()=0; }; class ProductB1 : ProductB { public: void Operation3() { cout<<"PD ProductB1 Operation3"<<endl; } void Operation4() { cout<<"PD ProductB1 Operation4"<<endl; } }; class ProductB2 : ProductB { public: void Operation3() { cout<<"DT ProductB2 Operation3"<<endl; } void Operation4() { cout<<"DT ProductB2 Operation4"<<endl; } }; //--------------- abstrct factory --------------------------- class Factory { public: virtual ProductA* CreateA () =0; virtual ProductB* CreateB ()=0; }; class Factory1 : Factory { public: ProductA* CreateA () { return new ProductA1(); } ProductB* CreateB () { return new ProductB1(); } }; class Factory2 : Factory { public: ProductA* CreateA () { return new ProductA2(); } ProductB* CreateB () { return new ProductB2(); } }; //--------------------- client -------------------------------- int _tmain(int argc, _TCHAR* argv[]) { Factory* pf = new Factory1(); ProductA *pa = pf->CreateA(); pa->Operation1(); pa->Operation2(); ProductB *pb = pf->CreateB(); pb->Operation3(); pb->Operation4(); return 0; }

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  • kill unsigned / signed comparison error

    - by anon
    In general, I want warnings of unsigned vs signed. However, in this particular case, I want it supressed; std::vector<Blah> blahs; for(int i = 0; i < blahs.size(); ++i) { ... I want to kill this comparison. Thanks! (using g++)

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  • Does the concept of "magic number" change from language to language?

    - by Gerardo Marset
    Take the following code in C/C++, for example: int foo[] = {0, 0, 0, 0}; No magic numbers, right? Now, the Python "equivalent" of that would be: foo = [0, 0, 0, 0] Still no magic numbers. However, in Python, that same thing can be written like this: foo = [0] * 4 And now we DO have a magic number. Or do we? I'm guessing this and other similar things are present on these and other languages.

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