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• Path String Concatenation Question.

  - by Nano HE

  Hi. Please see my code below. ifstream myLibFile ("libs//%s" , line); // Compile failed here ??? I want to combine the path string and open the related file again. #include <iostream> #include <fstream> #include <string> using namespace std; int main () { string line; ifstream myfile ("libs//Config.txt"); // There are several file names listed in the COnfig.txt file line by line. if (myfile.is_open()) { while (! myfile.eof() ) { getline (myfile,line); cout << line << endl; // Read details lib files based on the each line file name. string libFileLine; ifstream myLibFile ("libs//%s" , line); // Compile failed here ??? if (myLibFile.is_open()) { while (! myLibFile.eof() ) { cout<< "success\n"; } myLibFile.close(); } } myfile.close(); } else cout << "Unable to open file"; return 0; } Assume my [Config.txt] include the content below. And all the *.txt files located in libs folder. file1.txt file2.txt file3.txt

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• Java Filepath Question

  - by JJ Nooby

  I am trying to finish a java program that uploads a file from a client machine to a webserver. The java program is executed with a bat script. I need to pass in a file name to the java program somehow since the filename is different every time. Or can i somehow use %1 instead of the filepath? I dont know.

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• Try..Catch SQL Question

  - by Chris

  Is there any way of know which of my update or insert statements executed the catch block by failing

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• Path String Combination Question.

  - by Nano HE

  Hi. Please see my code below. ifstream myLibFile ("libs//%s" , line); // Compile failed here ??? I want to combine the path string and open the related file again. #include <iostream> #include <fstream> #include <string> using namespace std; int main () { string line; ifstream myfile ("libs//Config.txt"); // There are several file names listed in the COnfig.txt file line by line. if (myfile.is_open()) { while (! myfile.eof() ) { getline (myfile,line); cout << line << endl; // Read details lib files based on the each line file name. string libFileLine; ifstream myLibFile ("libs//%s" , line); // Compile failed here ??? if (myLibFile.is_open()) { while (! myLibFile.eof() ) { print "success"; } myLibFile.close(); } } myfile.close(); } else cout << "Unable to open file"; return 0; }

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• CRUD Question with Codeigniter

  - by Brad

  I have a database with blog entries in it. The desired output I am trying to acheive is 3 entrys displayed using the css3 multi paragraph and then another 3(or more) formatted with the codeigniter Character_limiter. So I need 3 displays formatted one way and 3+ formatted another way on the same page. So far this is what I have, but i do not know how to format the sql to achieve what I want. I can call all posts in descending order like I want, but dont know how to separate the code to achieve my output Controller: $this->db->order_by('id', 'DESC'); $this->db->limit('2'); $query = $this->db->get('posts'); if($query->result()) $data = array(); { $data['blog'] = $query->result(); } $data['title'] = 'LemonRose'; $data['content'] = 'home/home_content'; $this->load->view('template1', $data); View: <?php if (isset($blog)): foreach ($blog as $row): ?> <span class="title"><?php echo $row->title; ?> </span> <?php echo $row->date; ?> <div class="split"><?php echo $row->post =$this->typography->auto_typography($row->post); ?></div> <?php echo 'Post #',$row->id; ?> <p> Trackback URL: <? echo base_url()."trackbacks/track/$row->id";?></p> <hr /> <?php endforeach; endif; ?> The split class is multiple columns. I tried 2 different querys but dont know how to separate all the post displays. Also one query always overides the second and produces all split or all character limited paragraphs. Im lost here lol. Thanks

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• Question on ExtAudioFileRead and AudioBuffer for iPhone SDK

  - by backspacer

  I'm developing an iPhone app that uses the Extended Audio File Services. I try to use ExtAudioFileRead to read the audio file, and store the data in an AudioBufferList structure. AudioBufferList is defined as: struct AudioBufferList { UInt32 mNumberBuffers; AudioBuffer mBuffers[1]; }; typedef struct AudioBufferList AudioBufferList; and AudioBuffer is defined as struct AudioBuffer { UInt32 mNumberChannels; UInt32 mDataByteSize; void* mData; }; typedef struct AudioBuffer AudioBuffer; I want to manipulate the mData but I wonder what does the void* mean. Why is it void*? How can I decide what data type is actually stored in mData?

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• C++ Namespaces & templates question

  - by Kotti

  Hi! I have some functions that can be grouped together, but don't belong to some object / entity and therefore can't be treated as methods. So, basically in this situation I would create a new namespace and put the definitions in a header file, the implementation in cpp file. Also (if needed) I would create an anonymous namespace in that cpp file and put all additional functions that don't have to be exposed / included to my namespace's interface there. See the code below (probably not the best example and could be done better with another program architecture, but I just can't think of a better sample...) Sample code (header) namespace algorithm { void HandleCollision(Object* object1, Object* object2); } Sample code (cpp) #include "header" // Anonymous namespace that wraps // routines that are used inside 'algorithm' methods // but don't have to be exposed namespace { void RefractObject(Object* object1) { // Do something with that object // (...) } } namespace algorithm { void HandleCollision(Object* object1, Object* object2) { if (...) RefractObject(object1); } } So far so good. I guess this is a good way to manage my code, but I don't know what should I do if I have some template-based functions and want to do basically the same. If I'm using templates, I have to put all my code in the header file. Ok, but how should I conceal some implementation details then? Like, I want to hide RefractObject function from my interface, but I can't simply remove it's declaration (just because I have all my code in a header file)... The only approach I came up with was something like: Sample code (header) namespace algorithm { // Is still exposed as a part of interface! namespace impl { template <typename T> void RefractObject(T* object1) { // Do something with that object // (...) } } template <typename T, typename Y> void HandleCollision(T* object1, Y* object2) { impl::RefractObject(object1); // Another stuff } } Any ideas how to make this better in terms of code designing?

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• Beginner Question on traversing a EF4 model

  - by user564577

  I have a basic EF4 model with two entities. I'm using Self Tracking Entities Client has ClientAddresses relationship on clientkey = clientkey. (1 to many) How do i get a list/collection of client entities (STE) and their addresses (STE) but only ones where they live in a particular state or some such filter on the address??? This seems to filter and bring back clients but doesnt bring back addresses. var j = from client in context.Clients where client.ClientAddresses.All(c => c.ZIP == "80923") select client; I cant get this to create the Addresses because ClientAddresses is IEnumerable and it needs a TrackableCollection var query = from t1 in context.Clients join t2 in context.ClientAddresses on t1.ClientKey equals t2.ClientKey where t2.ZIP == "80923" select new Client { FirstName = t1.FirstName, LastName = t1.LastName, IsEnabled = t1.IsEnabled, ClientKey = t1.ClientKey, ChangeUser = t1.ChangeUser, ChangeDate = t1.ChangeDate, ClientAddresses = from a in t1.ClientAddresses select new ClientAddress { AddressKey = a.AddressKey, AddressLine1 = a.AddressLine1, AddressLine2 = a.AddressLine2, AddressTypeCode = a.AddressTypeCode, City = a.City, ClientKey = a.ClientKey, State = a.State, ZIP = a.ZIP } }; Any pointers would be appreciated. Thanks Edit: This seems to work.... var j = from client in context.Clients.Include("ClientAddresses") where client.ClientAddresses.Any(c => c.ZIP == "80923") select client;

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• basic json > struct question

  - by danwoods

  I'm working with twitter's api, trying to get the json data from http://search.twitter.com/trends/current.json which looks like: {"as_of":1268069036,"trends":{"2010-03-08 17:23:56":[{"name":"Happy Women's Day","query":"\"Happy Women's Day\" OR \"Women's Day\""},{"name":"#MusicMonday","query":"#MusicMonday"},{"name":"#MM","query":"#MM"},{"name":"Oscars","query":"Oscars OR #oscars"},{"name":"#nooffense","query":"#nooffense"},{"name":"Hurt Locker","query":"\"Hurt Locker\""},{"name":"Justin Bieber","query":"\"Justin Bieber\""},{"name":"Cmon","query":"Cmon"},{"name":"My World 2","query":"\"My World 2\""},{"name":"Sandra Bullock","query":"\"Sandra Bullock\""}]}} My structs look like: type trend struct { name string query string } type trends struct { id string arr_of_trends []trend } type Trending struct { as_of string trends_obj trends } and then I parse the JSON into a variable of type Trending. I'm very new to JSON so my main concern is making sure I've have the data structure correctly setup to hold the returned json data. I'm writing this in 'Go' for a project for school. (This is not part of a particular assignment, just something I'm demo-ing for a presentation on the language)

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• Access VBA question: Change the query being referenced by a function, depending on context

  - by Tara Amatista

  I have a custom function in Access2007 that hinges on grabbing data out of a specific query. It opens Outlook, creates a new email and populates the fields with specific addresses and data taken from the query ("DecisionEmail"). Now I want to make a different query ("RequestEmail") and have it populate the email with that data. So all I have to do is change this line: Set MailList = db.OpenRecordset("DecisionEmail") and that's where I get stumped. This is my desired result: If the user is on Form_Decision and clicks the button "Send email", "DecisionEmail" will get plugged into the function and that data will appear in the email. If the user on Form_SendRequest and clicks the button "Send email", "RequestEmail" will instead get plugged in. The reason that these are different queries is because they contain very different information that is smudged about in different ways. However, since it's just one little thing that needs to change in the function code, I don't think a brand new function is a good idea. My last resort would be to make a brand new function and use the Conditions field in the Macro interface to choose between them, but I have a feeling there's a more elegant solution possible. I have a vague notion of setting the query names as variables and using an If statement but I just don't have the mental vocabulary for thinking through this.

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• python socket related question.

  - by paul

  Hello,All im totally new to socket programming in python. i was read some tutorial and manual, but i didn't found what i want to make python related socket script in manual or tutorial. i want to make socket script which can send some info to server and also receive some info from server. For example, i want to send my login information to server, and want to receive result reply from server. but i have no idea..how to send my login information(id and password) to server. i was captured with wireshark, some process to send login info to server. and i was found port number is 5300 and server ip is 58.225.56.152 and i was send id is 'aaaaaaa' and password 'bbbbbbb' and i was received 'USER NOT FOUND' result from server. how can i make this kind of process with python socket ? if anyone help me some reference or some example or anything help much appreciate! 0000 00 50 56 f2 c8 cc 00 0c 29 a8 f8 c0 08 00 45 00 .PV.....).....E. 0010 00 e2 2a 19 40 00 80 06 d0 55 c0 a8 cb 85 3a e1 ..*[email protected]....:. 0020 38 98 05 f3 15 9a b9 86 62 7b 0d ab 0f ba 50 18 8.......b{....P. 0030 fa f0 26 14 00 00 50 54 3f 09 a2 91 7f 13 00 00 ..&...PT?....... 0040 00 1f 14 00 02 00 00 00 00 00 00 00 07 00 00 00 ................ 0050 61 61 61 61 61 61 61 50 54 3f 09 a2 91 7f 8b 00 aaaaaaaPT?...... 0060 00 00 1f 15 00 08 00 00 00 07 00 00 00 61 61 61 .............aaa 0070 61 61 61 61 07 00 00 00 62 62 62 62 62 62 62 01 aaaa....bbbbbbb. 0080 00 00 00 31 02 00 00 00 4b 52 0f 00 00 00 31 39 ...1....KR....19 0090 32 2e 31 36 38 2e 32 30 33 2e 31 33 33 30 00 00 2.168.203.1330.. 00a0 00 4d 69 63 72 6f 73 6f 66 74 20 57 69 6e 64 6f .Microsoft Windo 00b0 77 73 20 58 50 20 50 72 6f 66 65 73 73 69 6f 6e ws XP Profession 00c0 61 6c 20 53 65 72 76 69 63 65 20 50 61 63 6b 20 al Service Pack 00d0 32 14 00 00 00 31 30 30 31 33 30 30 35 33 31 35 2....10013005315 00e0 37 38 33 37 32 30 31 32 33 03 00 00 00 34 37 30 783720123....470 0000 00 0c 29 a8 f8 c0 00 50 56 f2 c8 cc 08 00 45 00 ..)....PV.....E. 0010 00 28 ae 37 00 00 80 06 8c f1 3a e1 38 98 c0 a8 .(.7......:.8... 0020 cb 85 15 9a 05 f3 0d ab 0f ba b9 86 63 35 50 10 ............c5P. 0030 fa f0 5f 8e 00 00 00 00 00 00 00 00 .._......... 0000 00 0c 29 a8 f8 c0 00 50 56 f2 c8 cc 08 00 45 00 ..)....PV.....E. 0010 00 4c ae 38 00 00 80 06 8c cc 3a e1 38 98 c0 a8 .L.8......:.8... 0020 cb 85 15 9a 05 f3 0d ab 0f ba b9 86 63 35 50 18 ............c5P. 0030 fa f0 3e 75 00 00 50 54 3f 09 a2 91 7f 16 00 00 ..>u..PT?....... 0040 00 1f 18 00 01 00 00 00 0e 00 00 00 55 73 65 72 ............User 0050 20 4e 6f 74 20 46 6f 75 6e 64 Not Found

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• manyToManyField question

  - by dotty

  Hay guys, I'm writing a simple app which logs recipes. I'm working out my models and have stumbled across a problem My Dish models needs to have many Ingredients. This is no problem because i would do something like this ingredients = models.ManyToManyfield(Ingredient) No problems, my dish now can have many ingrendients. However, the problem is that the ingredient needs to come in different quantities. I.E 4 eggs, 7 tablespoons sugar My Ingredient Model is very simple at the moment class Ingredient(models.Model): name = models.TextField(blank=False) slug = models.SlugField(blank=True) How would i go about work out this problem? What fields would i need to add, would i need to use a 'through' attribute on my ManyToManyfield to solve this problem?

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• PHP coding question?

  - by tag

  Does the following code below do the same thing and if so which one is better when coding? And is there a name for when PHP code is missing curly brackets? The PHP code. <?php if (isset($_POST['email'])) { echo $_POST['email']; }?> <?php if (isset($_POST['email'])) echo $_POST['email'];?>

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• Interview Question: .Any() vs if (.Length > 0) for testing if a collection has elements

  - by Chris

  In a recent interview I was asked what the difference between .Any() and .Length > 0 was and why I would use either when testing to see if a collection had elements. This threw me a little as it seems a little obvious but feel I may be missing something. I suggested that you use .Length when you simply need to know that a collection has elements and .Any() when you wish to filter the results. Presumably .Any() takes a performance hit too as it has to do a loop / query internally.

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• Watir question regarding selecting a hidden dropdown.

  - by AJ

  Hi, I have two dropdowns, the second dropdown does not show until a choice is made from the first one. Using watir, i can select the first dropdown, and when i watch it, the second one becomes active, but it cannot select it. i just tried the regular select_list using name and id. Here is the code for the second drop down. <td> <input type="hidden" value="1" name="list" id="list"> <script type="text/JavaScript" language="JavaScript"></script> <select> <option value="">1</option> <option value="2">2</option> <option value="3">3</option> </select> </td> I've also notice the value for the hidden field change as i select different options. Thanks for any help

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• Matlab Question - Principal Component Analysis

  - by Jack

  I have a set of 100 observations where each observation has 45 characteristics. And each one of those observations have a label attached which I want to predict based on those 45 characteristics. So it's an input matrix with the dimension 45 x 100 and a target matrix with the dimension 1 x 100. The thing is that I want to know how many of those 45 characteristics are relevant in my set of data, basically the principal component analysis, and I understand that I can do this with Matlab function processpca. Could you please tell me how can I do this? Suppose that the input matrix is x with 45 rows and 100 columns and y is a vector with 100 elements.

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• Java Beginner question about String[] args in the main method

  - by happysoul

  So I just tried excluding String[] args from the main method It compiled alright ! But JVM is showing an exception Why did it compile when String[] args HAS to be included every time ? What is going on here ? Why won't it show a compilation error ? typing this made me think that may be compiler did not see it as THE main method ..is that so ?

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• waveInProc / Windows audio question...

  - by BTR

  I'm using the Windows API to get audio input. I've followed all the steps on MSDN and managed to record audio to a WAV file. No problem. I'm using multiple buffers and all that. I'd like to do more with the buffers than simply write to a file, so now I've got a callback set up. It works great and I'm getting the data, but I'm not sure what to do with it once I have it. Here's my callback... everything here works: // Media API callback void CALLBACK AudioRecorder::waveInProc(HWAVEIN hWaveIn, UINT uMsg, DWORD dwInstance, DWORD dwParam1, DWORD dwParam2) { // Data received if (uMsg == WIM_DATA) { // Get wav header LPWAVEHDR mBuffer = (WAVEHDR *)dwParam1; // Now what? for (unsigned i = 0; i != mBuffer->dwBytesRecorded; ++i) { // I can see the char, how do get them into my file and audio buffers? cout << mBuffer->lpData[i] << "\n"; } // Re-use buffer mResultHnd = waveInAddBuffer(hWaveIn, mBuffer, sizeof(mInputBuffer[0])); // mInputBuffer is a const WAVEHDR * } } // waveInOpen cannot use an instance method as its callback, // so we create a static method which calls the instance version void CALLBACK AudioRecorder::staticWaveInProc(HWAVEIN hWaveIn, UINT uMsg, DWORD_PTR dwInstance, DWORD_PTR dwParam1, DWORD_PTR dwParam2) { // Call instance version of method reinterpret_cast<AudioRecorder *>(dwParam1)->waveInProc(hWaveIn, uMsg, dwInstance, dwParam1, dwParam2); } Like I said, it works great, but I'm trying to do the following: Convert the data to short and copy into an array Convert the data to float and copy into an array Copy the data to a larger char array which I'll write into a WAV Relay the data to an arbitrary output device I've worked with FMOD a lot and I'm familiar with interleaving and all that. But FMOD dishes everything out as floats. In this case, I'm going the other way. I guess I'm basically just looking for resources on how to go from LPSTR to short, float, and unsigned char. Thanks much in advance!

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• Browser based online game question

  - by Emre

  I am developing a small browser based game in asp.net. Think of a game room which has a capaticy of 22 players and players join the room by clicking a button. ( I am saving the number of players in the room in database) I need to call a method when the number of players in the room is 22. The problem is I don't know how to control the number of players in the room. I mean I think like there need to be a bacground code which has to run all the time at the server and that code controls the number and call the function. It's my first web project(school project) and I hope you all can help me.

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• navigation controller question

  - by saimun

  i want multiple back buttons for the view i have click through , i saw this tutorial before, but now i can't find it anymore, can someone help me please for example i have view1 with button, after i click it the navigation controller will push to view2 , then on the navigation bar we have view1 (back) button which can go back to view1, inside view2 i had did the same like view1 but this time is go to view3, and on the navigation bar instead have one view2 (back) button, i want to have view1 and view2 both button so i can choose which view i want to go back to on view3 navigation bar left button will look this < view1 < view2

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• paypal ipn simple question

  - by TIT

  I want to ask just a thing. I am using paypal for the first time. not by buttons. the data i sends through html page , is it returned by the ipn? i am using a paypal class and this is my custom data: $this->paypal_class->add_field('cemail', $this->session->userdata('check_email')); $this->paypal_class->add_field('fname', $this->session->userdata('check_name')); just wanna ask if it returned by the ipn or not.

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• C# Generics - Strange Interview Question

  - by udana

  An interviewer argued me "Genrics are not completely Genrics", He provided the example (Parameters int k,int d are not generic) public static void PrintThis<T>(T a, T b, T c, int k,int d) { } He asked me if i prove still it is generics , i will be allowed to take up the next round. I did not know what he is expecting from me,and what he really means by showing such example. Guide me how to smartly face such a strange interview ?. Thanks in advance.

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• Multi-threaded downloader in C# question

  - by blez

  Currently I have multi-threaded downloader class that uses HttpWebRequest/Response. All works fine, it's super fast, BUT.. the problem is that the data needs to be streamed while it's downloading to another app. That means that it must be streamed in the right order, the first chunk first, and then the next in the queue. Currently my downloader class is sync and Download() returns byte[]. In my async multi-threaded class I make for example, list with 4 empty elements (for slots) and I pass each index of the slot to each thread using the Download() function. That simulates synchronization, but that's not what I need. How should I do the queue thing, to make sure the data is streamed as soon as the first chunk start downloading.

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• Beginner question about merging in git

  - by wxyz

  I'm 15 and have just started using source control systems to manage my code a little better, so I'm a little new to this stuff. Right now I have this repository: [a]---[b]---[d]---[f] master \ \ [c]---[e] develop I want to wind up here: [a]---[b]---[d]---[f]---[g] master \ / \ / [c]---[e]---/ develop where g is equivalent to performing commits [c] and [e] on [f]. This is git checkout master; git merge develop, right?

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• Question regarding CGRectIntersectsRect and rotated rectangular image

  - by user309030

  Hi guys, I've got a long rectangular image which is rotated at different kind of angles. However the frame of the rectangular image does not rotate along with the image and instead, the rotation causes the frame to to become larger to fit the rotated image. So when I used CGRectIntersectsRect, the collision detection is totally off because the other image colliding with the rectangular image will collide before it even reaches the visible area of the rect image. In case you don't really know what I'm talking about, have a look at the ascii drawing: normal rectangular image frame, O - pixels, |, – - frame |----------| |OOOOOOOOOO| |----------| after rotation |----------| |O | | O | | O | | O | | O | | O | | O | | O | | O | |----------| I've read through some of the collision articles but all of them are talking about collision with a normal straight rectangle and what I really want is collision with a slanted image, preferably pixel collision detection. TIA for any suggestions made.

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