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• Mirroring a portion of the screen to an external display (in OSX)

  - by Adam

  I would like to write a program that can mirror a portion of the main display into a new window. Ideally this new window could then be displayed on an external monitor. I have seen this uiltity for a flightsim that does this on a pc (a multifunction display extractor). MFDex http://trac2.assembla.com/lightnings..._x86_Setup.msi I have looked at screen magnifiers or vnc clients for ideas but I think I need to write something from scratch. I have tried to do some reading on osx programing but where do I start in terms of gaining access to the display? I somehow need to extract the graphics from a particular program. Is it best to go near the final output stage (the individual pixels sent to the display) or somewhere nearer the window management stage. Any ideas or pointers would be much appreciated. I just need somewhere to start from. Regards,

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• Query on the scope of local variables in C

  - by darkie15

  All, Consider the following code: void func(void) { int a; printf ("%d", a); } int main(int argc, char **argv) { int a = 3; func(); printf("%d", a); } According to my understanding, the output should be: <junk value><3> Can anyone please confirm my understanding? My basic query is, does the compiler refer to the outer scope for a variable that has been declared but not defined? Regards, darkie

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• Libxml2: undefined reference to xmlTextReaderConstName

  - by Dmitry

  I have installed the latest libxml2-2.8.0, as usual: $ ./configure, $ make, $ make install. The $ xml2-config --cflags --libs gives this output: -I/usr/local/include/libxml2 -L/usr/local/lib -lxml2 -lm But trying to compile any example... $ gcc `xml2-config --cflags --libs` xmltest.c The linker says: /tmp/cc8ezrPl.o: In function `processNode': xmltest.c:(.text+0x19): undefined reference to `xmlTextReaderConstName' xmltest.c:(.text+0x38): undefined reference to `xmlTextReaderConstValue' ...etc. Anything I've googled can be solved by xml2-config --cflags --libs flags, or upgrading to the latest version of libxml2, or something. Unfortunately, neither works for me. What can be the steps to identify the problem? Using Ubuntu 12.04 64-bit.

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• Data-only static libraries with GCC

  - by regularfry

  How can I make static libraries with only binary data, that is without any object code, and make that data available to a C program? Here's the build process and simplified code I'm trying to make work: ./datafile: abcdefghij Makefile: libdatafile.a: ar [magic] datafile main: libdatafile.a gcc main.c libdatafile.a -o main main.c: #define TEXTPTR [more magic] int main(){ char mystring[11]; memset(mystring, '\0', 11); memcpy(TEXTPTR, mystring, 10); puts(mystring); puts(mystring); return 0; } The output I'm expecting from running main is, of course: abcdefghijabcdefghij My question is: what should [magic] and [more magic] be?

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• Jsoup to get data on <b> block

  - by Poh Sun

  I'm new to JSoup on Java and would like to enquire few questions. Given the HTML code of the page I would like to get is this <td width="70%" class="row1"> <b>4</b> <br />( 0 posts per day / 0.00% of total forum posts ) </td> My question here is I want to get the data 4 but the output I get is 4 ( 0 posts per day / 0.00% of total forum posts ) Here is my Java code Iterator <Element> element = totalPost.select("td[width=70%][class=row1]").iterator(); System.out.println(element.next().text()); Sorry if my question is not clear enough.

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• Parse file to hash in Ruby

  - by Taschetto

  I'm a ruby newcomer who's trying to read a text file (a Valgrind simulation output) like this: -------------------------------------------------------------------------------- Profile data file 'temp/gt_1024_2_16.out' -------------------------------------------------------------------------------- I1 cache: 1024 B, 16 B, 2-way associative D1 cache: 32768 B, 64 B, 8-way associative LL cache: 3145728 B, 64 B, 12-way associative Profiled target: bash run.sh Events recorded: Ir I1mr ILmr Dr D1mr DLmr Dw D1mw DLmw Events shown: Ir I1mr ILmr Dr D1mr DLmr Dw D1mw DLmw Event sort order: Ir I1mr ILmr Dr D1mr DLmr Dw D1mw DLmw Thresholds: 99 0 0 0 0 0 0 0 0 Include dirs: User annotated: Auto-annotation: off -------------------------------------------------------------------------------- Ir I1mr ILmr Dr D1mr DLmr Dw D1mw DLmw -------------------------------------------------------------------------------- 1,894,017 246,981 2,448 519,124 4,691 2,792 337,817 1,846 1,672 PROGRAM TOTALS // other data I want to extract the PROGRAM TOTALS table and put it into a hash. Something like... myHash = { :Ir => 1894017, :I1mr => 246981, ILmr => 2448, ..., DLmw => 1672 } What are the best options for doing this? Could the CSV classes help me out? Thanks a bunch.

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• Complicated Order By Clause?

  - by Todd

  Hi. I need to do what to me is an advanced sort. I have this two tables: Table: Fruit fruitid | received | basketid 1 20100310 2 2 20091205 3 3 20100220 1 4 20091129 2 Table: Basket id | name 1 Big Discounts 2 Premium Fruit 3 Standard Produce I'm not even sure I can plainly state how I want to sort (which is probably a big part of the reason I can't seem to write code to do it, lol). I do a join query and need to sort so everything is organized by basketid. The basketid that has the oldest fruit.received date comes first, then the other rows with the same basketid by date asc, then the basketid with the next earliest fruit.received date followed by the other rows with the same basketid, and so on. So the output would look like this: Fruitid | Received | Basket 4 20091129 Premuim Fruit 1 20100310 Premuim Fruit 2 20091205 Standard Produce 3 20100220 Big Discounts Any ideas how to accomplish this in a single execution?

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• dojo TimeTextBox don't listen to on blur event

  - by kawtousse

  Hi everyone, I want to add an on blur event to a dojo timetextbox but the event never been runned so the declaration of the timetextbox is like this: <label>End</label><input id="endp" name="endp" onBlur="calculateTimeSpent2(startp,endp,output);" /> the javascript function is like this: function calculateTimeSpent2(startp,endp,outputp) { var tmp0=document.getElementById('startp').value.split(':'); var tmp1=document.getElementById('endp').value.split(':'); if (tmp0[0]!='' && tmp1[0]!='') { var val1= findtime(tmp0[0],tmp0[1],tmp1[0],tmp1[1]); var tmp=val1.split(':'); if (tmp[0].indexOf('-')==-1) document.getElementById('outputp').value=val1; else { alert ("Start Time must be lower than End Time "); document.getElementById('endp').focus(); } } } I don't understand why dojo didn't execute the event correctly while loosing the focus. I tried to put the type=text but it does'nt work. Thanks for help.

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• system() not working in php using windows server 2003

  - by jazzy

  hi i have to extract the cabfile(.cab) on the server. i am Finding such script which extract cab file but i didn't get it yet. So now i am try to extract using cabarc.exe. But i face the problem that when i run command throuw commandline its work fine but when i give same command to system() or exec() function in php it is not work. code is as follow: $command = "c:\\exe\\cabarc X c:\\cab\\data.cab c:\\data\\"; if(($output = system($command,$return) != false) { echo "$return"; } it is not working when i use same string in commandline it works fine. please any body help me to why it not working what to do tomake it work is ther any rights issue. I had give the execute permission to the site. thanks

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• Mac OS X: getting names of changed/written files

  - by Patrick

  I remember having a command line tool on an older Mac OS X version (Tiger?) that told me the name of every file that was written to (or read) by any process on the system. It used fseventd (? or something like that). Is there something like that for the newest Mac OS X (10.6)? It should be run in a terminal window and then I can use the system as normal. Let's say I type cat /etc/passwd, the output of that program would be similar to /bin/cat /etc/passwd I can't use lsof because I can't get the timing right. Is this clear or do you need more information?

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• Hibernate - join un related objects

  - by CuriousMind

  I have a requirement, wherein I have to join two unrelated objects using Hibernate HQL. Here is the sample POJO class class Product{ int product_id; String name; String description; } and Class Item{ int item_id; String name; String description; int quantity; int product_id; //Note that there is no composed product object. } Now I want to perform a query like select * from Product p left outer join Item i on p.product_id = i.item_id I want a multidimensional array as an output of this query so that I can have separate instances of Product and Item, instead of one composed in another. Is there any way to do this in Hibernate?

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• Rails Rspec testing not saving a transactional model

  - by NolanDC

  I'm currently testing my Rails controllers using RSpec. In one controller, I have a model that uses transactions, so that it will not be saved unless another nested model (whose data is filled in using fields_for) is also saved correctly. The tests hit a snag when they reach the transaction. Some debugging output proves that the model is valid and ready to save. However, upon entering the transaction block, the model does not save. Even stranger, the code never reaches the else clause of "if model.save" (It does, however, enter the transaction block). I can only assume this is a problem with my testing a transactional model. Any ideas/hints/solutions?

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• __FILE__ In .h what does it resolve to

  - by Pablitorun

  Is there a specification on how the FILE macro will be expanded if it is in a .h? So if I #define MYFILE __FILE__ in foo.h and foo.c #includes "foo.h" void main(){ printf("%s",MYFILE); .... does this output foo.h or foo.c? (Yes I realize this is a stupid example) Sorry for what should be a simple question. The documentation on the web seems conflicting. For what it is worth VS2008 comes back as foo.c which is what I would expect....I think. I am just trying to confirm if this is defined behavior.

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• How can I remove my last commit in my local git repository

  - by michael

  Hi, This is the output of my 'git log'. But when I do a 'git pull' , the top commit causes conflict. So I did a 'git rebase -abort' commit 7826b25db424b95bae9105027edb7dcbf94d6e65 commit 5d1970105e8fd2c7b30c232661b93f1bcd00bc96 But my question is Can I 'save' my commit to a patch and then do a git pull? Just like I want to emulate * I did not do a git commit, but I did a 'git stash' instead * Do a git pull so that I should not get any merge error So I need to somehow 'turn back the clock'. Is that possible in git?

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• Merging and splitting overlapping rectangles to produce non-overlapping ones

  - by uj

  I am looking for an algorithm as follows: Given a set of possibly overlapping rectangles (All of which are "not rotated", can be uniformly represented as (left,top,right,bottom) tuplets, etc...), it returns a minimal set of (non-rotated) non-overlapping rectangles, that occupy the same area. It seems simple enough at first glance, but prooves to be tricky (at least to be done efficiently). Are there some known methods for this/ideas/pointers? Methods for not necessarily minimal, but heuristicly small, sets, are interesting as well, so are methods that produce any valid output set at all.

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• Connecting PHP Server and Android?

  - by user3439988

  I am trying to create a simple test application to transfer data back and forth between my server and Android device. The following are the things I aim for: Ability to upload data and files to the server. To be able to view my files on the server. To be able to download the files from the server to my android device. Ability of the server to send me updates on the files or notifications to my phone. I need a safe and secure way to do these things. I have tried these: HTTPPost requests onto the server and echoing the output accordingly and capturing the HTTPresponse and parsing it. For files I have tried using MultipartEntity, but I think that has been deprecated.

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• GetDiskFreeSpaceEx in winCE 5.0 emulator?

  - by vidhyarthi

  Hi, I am trying to use GetDiskFreeSpaceEx in wince5.0 emulator. This is the following code I have written. ULARGE_INTEGER notused, totalBytes, freeBytes; GetDiskFreeSpaceEx(_T("\\Windows"),&notused,&totalBytes,&freeBytes); printf(" Error in disk %d ", GetLastError()); printf(" values = notused %d,totalBytes %d,freeBytes %d",notused,totalBytes,freeBytes); *Output * 14540 PID:3db620e TID:3e5c83e Error in disk 0 14540 PID:3db620e TID:3e5c83e values = notused 25987296,totalBytes 0,freeBytes 26234880 The total bytes that I get is zero. Am I missing something or in emulator is that OK?

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• Is there a simpliest way of doing this?

  - by Tom Brito

  Is there a simpler way of implement this? Or a implemented method in JDK or other lib? /** * Convert a byte array to 2-byte-size hexadecimal String. */ public static String to2DigitsHex(byte[] bytes) { String hexData = ""; for (int i = 0; i < bytes.length; i++) { int intV = bytes[i] & 0xFF; // positive int String hexV = Integer.toHexString(intV); if (hexV.length() < 2) { hexV = "0" + hexV; } hexData += hexV; } return hexData; } public static void main(String[] args) { System.out.println(to2DigitsHex(new byte[] {8, 10, 12})); } the output is: "08 0C 0A" (without the spaces)

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• Code corresponding to leaks with Visual Leak Detector

  - by matt

  I am trying to use Visual Leak Detector in Visual Studio 2008, here is an example of the output I get: Detected memory leaks! Dumping objects -> {204} normal block at 0x036C1568, 1920 bytes long. Data: < > 80 08 AB 03 00 01 AB 03 80 F9 AA 03 00 F2 AA 03 {203} normal block at 0x0372CC68, 40 bytes long. Data: <( > 28 00 00 00 80 02 00 00 E0 01 00 00 01 00 18 00 {202} normal block at 0x0372CC00, 44 bytes long. Data: << E > 3C 16 45 00 80 02 00 00 E0 01 00 00 01 00 00 00 The user's guide says to click on any line to jump to the corresponding file/line of code ; I tried clicking on every line but nothing happens! What am I missing?

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• Custom events and event pooling in jQuery - What's the point?

  - by Nick Lowman

  I've been reading about custom events in jQuery and why they should be used but I'm still clearly missing the point. There is a very good article I read here that has the following code example; function UpdateOutput() { var name = $('#txtName').val(); var address = $('#txtAddress').val(); var city = $('#txtCity').val(); $('#output').html(name + ' ' + address + ' ' + city); } $(document).bind('NAME_CHANGE ADDRESS_CHANGE CITY_CHANGE', function() { UpdateOutput(); }); $('#txtAddress').keyup(function() { $(document).trigger('ADDRESS_CHANGE'); }); $('#txtCity').keyup(function() { $(document).trigger('CITY_CHANGE'); }); Can someone tell me why I just don't call the UpdateOutput() function directly? It would still work exactly the same way, i.e. $('#txtAddress').keyup(function() { UpdateOutput() }); $('#txtCity').keyup(function() { UpdateOutput() }); Many thanks

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• How can i initialize an array without knowing it size?

  - by Sara

  I have a situation where i have to apply a criteria on an input array and reuturn another array as output which will have smaller size based upon the filtering criteria. Now problem is i do not know the size of filtered results, so i can not initialize the array with specific value. And i do not want it to be large size will null values because i am using array.length; later on. One way is to first loop the original input array and set a counter, and then make another loop with that counter length and initialize and fill this array[]. But is there anyway to do the job in just one loop?

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• android spectrum analysis of streaming input

  - by TheBeeKeeper

  for a school project I am trying to make an android application that, once started, will perform a spectrum analysis of live audio received from the microphone or a bluetooth headset. I know I should be using FFT, and have been looking at moonblink's open source audio analyzer ( http://code.google.com/p/moonblink/wiki/Audalyzer ) but am not familiar with android development, and his code is turning out to be too difficult for me to work with. So I suppose my questions are, are there any easier java based, or open source android apps that do spectrum analysis I can reference? Or is there any helpful information that can be given, such as; steps that need be taken to get the microphone input, put it into an fft algorithm, then display a graph of frequency and pitch over time from its output? Any help would be appreciated, thanks.

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• Compiler: Translation to assembly

  - by sub

  I've written an interpreter for my experimental language and know I want to move on and write a small compiler for it. It will probably take the source, go through the same steps as the interpreter (tokenizer, parser) and then translate the source to assembly. Now my questions: Can I expect that every command in my language can be 1:1 translated to a bunch of assembly instructions? What I mean is if I will have to completely throw over the whole input program or if it is just translated to assembly per line. Which assembler should I use as output format?

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• How does ambigous methods are resolved in java ?

  - by Jijoy

  Hi , I do have a question. package org.study.algos; public class Study { public static void main(String[] args) { A a = new A(); a.m1(null); } } class A { public void m1(String s) { System.out.println("String"); System.out.println(s); } public void m1(Object obj) { System.out.println("Object"); System.out.println(obj); } } Here , the output is String null Why JVM resolve the method to one with String arguement ? Thanks in advance J

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• Django: do I need to do HttpResponseRedirect to render a simple string after a POST?

  - by AP257

  I've got a mobile app that makes POST requests to a Django site. I want to return a simple string (not a template-based page) after the app makes the POST request, saying 'Success' or 'Failure' as appropriate. However I know that after a POST request in Django you're supposed to do a HttpResponseRedirect. But, do I really need to redirect to another page and write a new function to handle it, all to output a string? And if so, how do I pass the success/failure status of the app in the HttpResponseRedirect, since it's only supposed to take one argument? Thanks!

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