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• Android : Bitmap save to location

  - by Chrispix

  I am working on a function to download an image from a web server, redisplay it on the screen, and if the user wishes to keep the image, save it on the SD card in a certain folder. Is there an easy way to take a bitmap and just save it to the SD card in a folder of my choice? My issue is that I can download the image, display it on screen as a Bitmap. The only way I have been able to find to save an image to a particular folder is to use FileOutputStream, but that requires a byte array. I am not sure how to convert (if this is even the right way) from Bitmap to byte array, so I can use a Fileoutput stream to write the data. The other option I have is it use MediaStore : MediaStore.Images.Media.insertImage(getContentResolver(), bm, barcodeNumber + ".jpg Card Image", barcodeNumber + ".jpg Card Image"); Which works fine to save to SD card, but does not allow you to customize the folder. Any assistance would be very much appreciated. Thank you in advance.

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• Looking for ideas how to refactor my (complex) algorithm

  - by _simon_

  I am trying to write my own Game of Life, with my own set of rules. First 'concept', which I would like to apply, is socialization (which basicaly means if the cell wants to be alone or in a group with other cells). Data structure is 2-dimensional array (for now). In order to be able to move a cell to/away from a group of another cells, I need to determine where to move it. The idea is, that I evaluate all the cells in the area (neighbours) and get a vector, which tells me where to move the cell. Size of the vector is 0 or 1 (don't move or move) and the angle is array of directions (up, down, right, left). This is a image with representation of forces to a cell, like I imagined it (but reach could be more than 5): Let's for example take this picture: Forces from lower left neighbour: down (0), up (2), right (2), left (0) Forces from right neighbour : down (0), up (0), right (0), left (2) sum : down (0), up (2), right (0), left (0) So the cell should go up. I could write an algorithm with a lot of if statements and check all cells in the neighbourhood. Of course this algorithm would be easiest if the 'reach' parameter is set to 1 (first column on picture 1). But what if I change reach parameter to 10 for example? I would need to write an algorithm for each 'reach' parameter in advance... How can I avoid this (notice, that the force is growing potentialy (1, 2, 4, 8, 16, 32,...))? Can I use specific design pattern for this problem? Also: the most important thing is not speed, but to be able to extend initial logic. Things to take into consideration: reach should be passed as a parameter i would like to change function, which calculates force (potential, fibonacci) a cell can go to a new place only if this new place is not populated watch for corners (you can't evaluate right and top neighbours in top-right corner for example)

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• What is the most platform- and Python-version-independent way to make a fast loop for use in Python?

  - by Statto

  I'm writing a scientific application in Python with a very processor-intensive loop at its core. I would like to optimise this as far as possible, at minimum inconvenience to end users, who will probably use it as an uncompiled collection of Python scripts, and will be using Windows, Mac, and (mainly Ubuntu) Linux. It is currently written in Python with a dash of NumPy, and I've included the code below. Is there a solution which would be reasonably fast which would not require compilation? This would seem to be the easiest way to maintain platform-independence. If using something like Pyrex, which does require compilation, is there an easy way to bundle many modules and have Python choose between them depending on detected OS and Python version? Is there an easy way to build the collection of modules without needing access to every system with every version of Python? Does one method lend itself particularly to multi-processor optimisation? (If you're interested, the loop is to calculate the magnetic field at a given point inside a crystal by adding together the contributions of a large number of nearby magnetic ions, treated as tiny bar magnets. Basically, a massive sum of these.) # calculate_dipole # ------------------------- # calculate_dipole works out the dipole field at a given point within the crystal unit cell # --- # INPUT # mu = position at which to calculate the dipole field # r_i = array of atomic positions # mom_i = corresponding array of magnetic moments # --- # OUTPUT # B = the B-field at this point def calculate_dipole(mu, r_i, mom_i): relative = mu - r_i r_unit = unit_vectors(relative) #4pi / mu0 (at the front of the dipole eqn) A = 1e-7 #initalise dipole field B = zeros(3,float) for i in range(len(relative)): #work out the dipole field and add it to the estimate so far B += A*(3*dot(mom_i[i],r_unit[i])*r_unit[i] - mom_i[i]) / sqrt(dot(relative[i],relative[i]))**3 return B

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• Environment variable in xcconfig won't expand in Settings.bundle/Root.plist

  - by AO

  I have defined my own environment variable in a .xcconfig file and based my configurations on that as described at http://www.silverchairsolutions.com/blog/2008/03/automating-cocoa-deployments-with-sparkle-and-xcode. My environment variable is indeed expanded in Info.plist but not in my Settings.bundle/Root.plist. Why won't it expand there? Root.plist looks like this: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>Title</key> <string>${PRODUCT_NAME}</string> <key>PreferenceSpecifiers</key> <array> <dict> <key>DefaultValue</key> <string>${PRODUCT_NAME}</string> <key>Key</key> <string>version</string> <key>Title</key> <string>Version</string> <key>Type</key> <string>PSTitleValueSpecifier</string> </dict> <dict> <key>DefaultValue</key> <string></string> <key>Key</key> <string>atc</string> <key>Title</key> <string>ATC</string> <key>Type</key> <string>PSTitleValueSpecifier</string> </dict> </array>

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• Setting ivar in objective-c from child view in the iPhone

  - by Ivan

  Hi there! Maybe a FAQ at this website. I have a TableViewController that holds a form. In that form I have two fields (each in it's own cell): one to select who paid (single selection), and another to select people expense is paid for (multiple selection). Both fields open a new TableViewController included in an UINavigationController. Single select field (Paid By) holds an object Membership Multiple select field (Paid For) holds an object NSMutableArray Both vars are being sent to the new controller identically the same way: mySingleSelectController.crSelectedMember = self.crPaidByMember; myMultipleSelectController.crSelectedMembers = self.crSelectedMembers; From Paid for controller I use didSelectAtIndexPath method to set a mutable array of Memberships for whom is paid: if ([[tableView cellForRowAtIndexPath:indexPath] accessoryType] == UITableViewCellAccessoryCheckmark) { [self.crSelectedMembers removeObject:[self.crGroupMembers objectAtIndex:indexPath.row]]; //... } else { [self.crSelectedMembers addObject:[self.crGroupMembers objectAtIndex:indexPath.row]]; //... } So far everything goes well. An mutable array (crSelectedMembers) is perfectly set from child view. But... I have trouble setting Membership object. From Paid By controller I use didSelectAtIndexPath to set Membership: [self setCrSelectedMember:[crGroupMembers objectAtIndex:indexPath.row]]; By NSlogging crSelectedMember I get the right selected member in self, but in parent view, to which ivar is pointed, nothing is changed. Am I doing something wrong? Cause I CAN call the method of crSelectedMembers, but I can't change the value of crSelectedMember.

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• jQuery "Autcomplete" plugin is messing up the order of my data

  - by Max Williams

  I'm using Jorn Zaefferer's Autocomplete plugin on a couple of different pages. In both instances, the order of displayed strings is a little bit messed up. Example 1: array of strings: basically they are in alphabetical order except for General Knowledge which has been pushed to the top: General Knowledge,Art and Design,Business Studies,Citizenship,Design and Technology,English,Geography,History,ICT,Mathematics,MFL French,MFL German,MFL Spanish,Music,Physical Education,PSHE,Religious Education,Science,Something Else Displayed strings: General Knowledge,Geography,Art and Design,Business Studies,Citizenship,Design and Technology,English,History,ICT,Mathematics,MFL French,MFL German,MFL Spanish,Music,Physical Education,PSHE,Religious Education,Science,Something Else Note that Geography has been pushed to be the second item, after General Knowledge. The rest are all fine. Example 2: array of strings: as above but with Cross-curricular instead of General Knowledge. Cross-curricular,Art and Design,Business Studies,Citizenship,Design and Technology,English,Geography,History,ICT,Mathematics,MFL French,MFL German,MFL Spanish,Music,Physical Education,PSHE,Religious Education,Science,Something Else Displayed strings: Cross-curricular,Citizenship,Art and Design,Business Studies,Design and Technology,English,Geography,History,ICT,Mathematics,MFL French,MFL German,MFL Spanish,Music,Physical Education,PSHE,Religious Education,Science,Something Else Here, Citizenship has been pushed to the number 2 position. I've experimented a little, and it seems like there's a bug saying "put things that start with the same letter as the first item after the first item and leave the rest alone". Kind of mystifying. I've tried a bit of debugging by triggering alerts inside the autocomplete plugin code but everywhere i can see, it's using the correct order. it seems to be just when its rendered out that it goes wrong. Any ideas anyone? max

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• Resizing layouts for orientation change?

  - by Cole

  Normal: Landscape: See how the ListView overlaps other things on the screen when in landscape mode? How can I keep this from happening? XML: <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" android:id="@+id/main" > <RelativeLayout android:id="@+id/myWishLists" android:layout_width="fill_parent" android:layout_height="50dp"> <Spinner android:id="@+id/spinner1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:prompt="@string/optionsSpinner" android:entries="@array/options" /> </RelativeLayout> <TextView android:id="@+id/myListsText" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/myWishLists" android:layout_centerHorizontal="true" android:text="My Wish Lists" android:textStyle="bold" android:textAppearance="?android:attr/textAppearanceLarge" /> <RelativeLayout android:id="@+id/listsList" android:layout_width="fill_parent" android:layout_height="445dp" android:layout_alignParentBottom="true" android:layout_alignParentLeft="true"> <ListView android:id="@+id/lists" android:layout_width="fill_parent" android:layout_height="fill_parent" android:entries="@array/entries" > </ListView> </RelativeLayout> </RelativeLayout>

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• Upload image from J2ME client to a Servlet

  - by Akash

  I want to send an image from a J2ME client to a Servlet. I am able to get a byte array of the image and send it using HTTP POST. conn = (HttpConnection) Connector.open(url, Connector.READ_WRITE, true); conn.setRequestMethod(HttpConnection.POST); conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); os.write(bytes, 0, bytes.length); // bytes = byte array of image This is the Servlet code: String line; BufferedReader r1 = new BufferedReader(new InputStreamReader(in)); while ((line = r1.readLine()) != null) { System.out.println("line=" + line); buf.append(line); } String s = buf.toString(); byte[] img_byte = s.getBytes(); But the problem I found is, when I send bytes from the J2ME client, some bytes are lost. Their values are 0A and 0D hex. Exactly, the Carriage Return and Line Feed. Thus, either POST method or readLine() are not able to accept 0A and 0D values. Any one have any idea how to do this, or how to use any another method?

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• Objective-C NSMutableDictionary Disappearing

  - by blackmage

  I am having this problem with the NSMutableDictionary where the values are not coming up. Snippets from my code look like this: //Data into the Hash and then into an array yellowPages = [[NSMutableArray alloc] init]; NSMutableDictionary *address1=[[NSMutableDictionary alloc] init]; [address1 setObject:@"213 Pheasant CT" forKey: @"Street"]; [address1 setObject:@"NC" forKey: @"State"]; [address1 setObject:@"Wilmington" forKey: @"City"]; [address1 setObject:@"28403" forKey: @"Zip"]; [address1 setObject:@"Residential" forKey: @"Type"]; [yellowPages addObject:address1]; NSMutableDictionary *address2=[[NSMutableDictionary alloc] init]; [address1 setObject:@"812 Pheasant CT" forKey: @"Street"]; [address1 setObject:@"NC" forKey: @"State"]; [address1 setObject:@"Wilmington" forKey: @"City"]; [address1 setObject:@"28403" forKey: @"Zip"]; [address1 setObject:@"Residential" forKey: @"Type"]; [yellowPages addObject:address2]; //Iterate through array pulling the hash and insert into Location Object for(int i=0; i<locationCount; i++){ NSMutableDictionary *anAddress=[theAddresses getYellowPageAddressByIndex:i]; //Set Data Members Location *addressLocation=[[Location alloc] init]; addressLocation.Street=[anAddress objectForKey:@"Street"]; locations[i]=addressLocation; NSLog(addressLocation.Street); } So the problem is only the second address is printed, the 813 and I can't figure out why. Can anyone offer any help?

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• php xpath problems

  - by Phill Pafford

  I'm doing a cURL POST and get the error response back, parse it into an array but having issues with xpath now. // XML <?xml version="1.0" encoding="UTF-8" standalone="yes"?> <errors xmlns="http://host/project"> <error code="30" description="[] is not a valid email address."/> <error code="12" description="id[] does not exist."/> <error code="3" description="account[] does not exist."/> <error code="400" description="phone[] does not exist."/> </errors> // Function / Class class parseXML { protected $xml; public function __construct($xml) { if(is_file($xml)) { $this->xml = simplexml_load_file($xml); } else { $this->xml = simplexml_load_string($xml); } } public function getErrorMessage() { $in_arr = false; $el = $this->xml->xpath("//@errors"); $returned_errors = count($el); if($returned_errors > 0) { foreach($el as $element) { if(is_object($element) || is_array($element)) { foreach($element as $item) { $in_arr[] = $item; } } } } else { return $returned_errors; } return $in_arr; } } // Calling function // $errorMessage is holding the XML value in an array index // something like: $arr[3] = $xml; $errMsg = new parseXML($arr[3]); $errMsgArr = $errMsg->getErrorMessage(); What I would like is all the error code and description attribute values

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• Help matching fields between two classes

  - by Michael

  I'm not too experienced with Java yet, and I'm hoping someone can steer me in the right direction because right now I feel like I'm just beating my head against a wall... The first class is called MeasuredParams, and it's got 40+ numeric fields (height, weight, waistSize, wristSize - some int, but mostly double). The second class is a statistical classifier called Classifier. It's been trained on a subset of the MeasuredParams fields. The names of the fields that the Classifier has been trained on is stored, in order, in an array called reqdFields. What I need to do is load a new array, toClassify, with the values stored in the fields from MeasuredParams that match the field list (including order) found in reqdFields. I can make any changes necessary to the MeasuredParams class, but I'm stuck with Classifier as it is. My brute-force approach was to get rid of the fields in MeasuredParams and use an arrayList instead, and store the field names in an Enum object to act as an index pointer. Then loop through the reqdFields list, one element at a time, and find the matching name in the Enum object to find the correct position in the arrayList. Load the value stored at that positon into toClassify, and then continue on to the next element in reqdFields. I'm not sure how exactly I would search through the Enum object - it would be a lot easier if the field names were stored in a second arrayList. But then the index positions between the two would have to stay matched, and I'm back to using an Enum. I think. I've been running around in circles all afternoon, and I keep thinking there must be an easier way of doing it. I'm just stuck right now and can't see past what I've started. Any help would be GREATLY appreciated. Thanks so much! Michael

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• Zendx JQuery Autocomplete

  - by emeraldjava

  I've been trying to get the Zend Jquery autocomplete function working, when i noticed this section in the Zend documentation. The following UI widgets are available as form view helpers. Make sure you use the correct version of jQuery UI library to be able to use them. The Google CDN only offers jQuery UI up to version 1.5.2. Some other components are only available from jQuery UI SVN, since they have been removed from the announced 1.6 release. autoComplete($id, $value, $params, $attribs): The AutoComplete View helper will be included in a future jQuery UI version (currently only via jQuery SVN) and creates a text field and registeres it to have auto complete functionality. The completion data source has to be given as jQuery related parameters 'url' or 'data' as described in the jQuery UI manual. Does anybody know which svn url tag or branch i need to download to get a javascript file with the autocomplete functions available in it? At the moment, my Bootstrap.php has $view->addHelperPath('ZendX/JQuery/View/Helper/', 'ZendX_JQuery_View_Helper'); $view->jQuery()->enable(); $view->jQuery()->uiEnable(); Zend_Controller_Action_HelperBroker::addHelper( new ZendX_JQuery_Controller_Action_Helper_AutoComplete() ); // Add it to the ViewRenderer $viewRenderer = new Zend_Controller_Action_Helper_ViewRenderer(); $viewRenderer->setView($view); Zend_Controller_Action_HelperBroker::addHelper($viewRenderer); In my layout, i define the jquery ui version i want <?php echo $this->jQuery() ->setUiVersion('1.7.2');?> Finally my index.phtml has the autocomplete widget <p><?php $data = array('New York', 'Tokyo', 'Berlin', 'London', 'Sydney', 'Bern', 'Boston', 'Baltimore'); ?> <?php echo $this->autocomplete("ac1", "", array('data' => $data));?></p> I'm using Zend 1.8.3 atm.

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• Activesupport::JSON.decode crashes on this,

  - by Waheedi

  I wonder why i cant decode this json string, all what i want is to convert this to a proper Ruby hash, anyone have an idea? i think the array of objects is cracking it ? Parameters: {"{\"origins\":"=>{"{\"origin\":\"this\"},{\"origin\":\"dont\"},{\"origin\":\"dont me please\"},{\"origin\":\"and me please\"},{\"origin\":\"dont\"},{\"origin\":\"dont\"},{\"origin\":\"dont\"},{\"origin\":\"okay\"},{\"origin\":\"dont\"},{\"origin\":\"go\"},{\"origin\":\"go\"}"=>{",\"url\":\"file:///Users/waheed/Desktop/untitled.html\",\"apik\":\"helloapik\",\"host\":\"http://localhost:3000/\"}"=>nil}}} now in my javascript im doing this //this is the object im trying to send over xmlhttprequest and im using JSON.org library which has the stringify method function tObject(origins,url,apik){ this.origins=origins; //this is an array of string this.url=url; this.apik=apik; } var t = new tObject(myStringArr,"www.foo.com","welcome guys"); ajax = new Ajax(); //this is an xhcon class you dont worry about it url here http://xkr.us/code/javascript/XHConn/ ajax.connect("http://localhost:3000/","POST",JSON.stringify(t), callback); in my rails app the parameters that has been posted looks like this: Parameters: {"{\"origins\":"={"{\"origin\":\"this\"},{\"origin\":\"yo yo\"},{\"origin\":\" me please\"},{\"origin\":\"and me please\"},{\"origin\":\"here\"},{\"origin\":\"and again\"},{\"origin\":\"again\"},{\"origin\":\"okay\"},{\"origin\":\"yes\"},{\"origin\":\"go\"},{\"origin\":\"go\"}"={",\"url\":\"www.foo.com\",\"apik\":\"welcome guys\"}"=nil}}} why it results with nil at the last ? i've tried to decode it but it could not work because it blame the string is not json string ?!!? TIA, waheedi

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• Violating 1st normal form, is it okay for my purpose?

  - by Nick

  So I'm making a running log, and I have the workouts stored as entries in a table. For each workout, the user can add intervals (which consist of a time and a distance), so I have an array like this: [workout] => [description] => [comments] => ... [intervals] => [0] => [distance] => 200m [time] => 32 [1] => [distance] => 400m [time] => 65 ... I'm really tempted to throw the "intervals" array into serialize() or json_encode() and put it in an "intervals" field in my table, however this violates the principles of good database design (which, incidentally, I know hardly anything about). Is there any disadvantage to doing this? I never plan on querying my table based on the contents of "intervals". Creating a separate table just for intervals seems like a lot of unnecessary complexity, so if anyone with more experience has had a situation like this, what route did you take and how did it work out?

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• Login to website using PHP and get text from page

  - by Anthony Garand

  I am trying to login to a website and grab content from a page you must be authenticated to see. I have done some research and have seen some examples using both cURL and stream_context_create but I cannot get either way to work. I have the url for the page to login to, and the page that contains the data I need to get. Your help is much appreciated! Here's what I'm working with: <?php $pages = array('home' => 'https://www.53.com/wps/portal/personal', 'login' => 'https://www.53.com/wps/portal/personal', 'data' => 'https://www.53.com/servlet/efsonline/index.html?Messages.SortedBy=DATE,REVERSE'); $ch = curl_init(); //Set options for curl session $options = array(CURLOPT_USERAGENT => 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)', CURLOPT_SSL_VERIFYPEER => FALSE, CURLOPT_SSL_VERIFYHOST => 2, CURLOPT_HEADER => TRUE, //CURLOPT_RETURNTRANSFER => TRUE, CURLOPT_COOKIEFILE => 'cookie.txt', CURLOPT_COOKIEJAR => 'cookies.txt'); //Hit home page for session cookie $options[CURLOPT_URL] = $pages['home']; curl_setopt_array($ch, $options); curl_exec($ch); //Login $options[CURLOPT_URL] = $pages['login']; $options[CURLOPT_POST] = TRUE; $options[CURLOPT_POSTFIELDS] = 'uid-input=xxx&pw=xxx'; $options[CURLOPT_FOLLOWLOCATION] = FALSE; curl_setopt_array($ch, $options); curl_exec($ch); //Hit data page $options[CURLOPT_URL] = $pages['data']; curl_setopt_array($ch, $options); $data = curl_exec($ch); //Output data echo $data; //Close curl session curl_close($ch); ?> Cheers, Anthony

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• PHP CURL Google Calendar using Private URL

  - by MooCow

  I'm trying to get an array of events from Google Calendar using the Private URL. I read the Google API document but I want to try doing this without using the ZEND library since I have no idea what the eventual server file structure is and avoid having other people edit the codes. I also did a search before posting and ran into the same condition where PHP CURL_EXEC returns false with the URL but I get a JSON file if the URL is open using a web browser. Since I'm using the Private URL, do I really need to authenticate against the Google server using ZEND? I'm trying to have PHP clean up the array before encoding it for Flash. $URL = <string of the private URL from Google Calendar> $ch = curl_init($URL); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); $data = curl_exec($ch); curl_close($ch); $result = json_decode($data); print '<pre>'.var_export($data,1).'</pre>'; Screen output >>> false

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• Boost.MultiIndex: Are there way to share object between two processes?

  - by Arman

  Hello, I have a Boost.MultiIndex big array about 10Gb. In order to reduce the reading I thought there should be a way to keep the data in the memory and another client programs will be able to read and analyse it. What is the proper way to organize it? The array looks like: struct particleID { int ID;// real ID for particle from Gadget2 file "ID" block unsigned int IDf;// postition in the file particleID(int id,const unsigned int idf):ID(id),IDf(idf){} bool operator<(const particleID& p)const { return ID<p.ID;} unsigned int getByGID()const {return (ID&0x0FFF);}; }; struct ID{}; struct IDf{}; struct IDg{}; typedef multi_index_container< particleID, indexed_by< ordered_unique< tag<IDf>, BOOST_MULTI_INDEX_MEMBER(particleID,unsigned int,IDf)>, ordered_non_unique< tag<ID>,BOOST_MULTI_INDEX_MEMBER(particleID,int,ID)>, ordered_non_unique< tag<IDg>,BOOST_MULTI_INDEX_CONST_MEM_FUN(particleID,unsigned int,getByGID)> > > particlesID_set; Any ideas are welcome. kind regards Arman.

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• How to convert an InputStream to a DataHandler?

  - by pcorey

  I'm working on a java web application in which files will be stored in a database. Originally we retrieved files already in the DB by simply calling getBytes on our result set: byte[] bytes = resultSet.getBytes(1); ... This byte array was then converted into a DataHandler using the obvious constructor: dataHandler=new DataHandler(bytes,"application/octet-stream"); This worked great until we started trying to store and retrieve larger files. Dumping the entire file contents into a byte array and then building a DataHandler out of that simply requires too much memory. My immediate idea is to retrieve a stream of the data in the database with getBinaryStream and somehow convert that InputStream into a DataHandler in a memory-efficient way. Unfortunately it doesn't seem like there's a direct way to convert an InputStream into a DataHandler. Another idea I've been playing with is reading chunks of data from the InputStream and writing them to the OutputStream of the DataHandler. But... I can't find a way to create an "empty" DataHandler that returns a non-null OutputStream when I call getOutputStream... Has anyone done this? I'd appreciate any help you can give me or leads in the right direction.

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• Distance between Long Lat coord using SQLITE

  - by munchine

  I've got an sqlite db with long and lat of shops and I want to find out the closest 5 shops. So the following code works fine. if(sqlite3_prepare_v2(db, sqlStatement, -1, &compiledStatement, NULL) == SQLITE_OK) { while (sqlite3_step(compiledStatement) == SQLITE_ROW) { NSString *branchStr = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 0)]; NSNumber *fLat = [NSNumber numberWithFloat:(float)sqlite3_column_double(compiledStatement, 1)]; NSNumber *fLong = [NSNumber numberWithFloat:(float)sqlite3_column_double(compiledStatement, 2)]; NSLog(@"Address %@, Lat = %@, Long = %@", branchStr, fLat, fLong); CLLocation *location1 = [[CLLocation alloc] initWithLatitude:currentLocation.coordinate.latitude longitude:currentLocation.coordinate.longitude]; CLLocation *location2 = [[CLLocation alloc] initWithLatitude:[fLat floatValue] longitude:[fLong floatValue]]; NSLog(@"Distance i meters: %f", [location1 getDistanceFrom:location2]); [location1 release]; [location2 release]; } } I know the distance from where I am to each shop. My question is. Is it better to put the distance back into the sqlite row, I have the row when I step thru the database. How do I do that? Do I use the UPDATE statement? Does someone have a piece of code to help me. I can read the sqlite into an array and then sort the array. Do you recommend this over the above approach? Is this more efficient? Finally, if someone has a better way to get the closest 5 shops, love to hear it.

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• Concat LPSTR in C++

  - by Cat Man Do

  Trying to use as basic C++ as I can to build a list of numbers from 1-52 in a random order (deck of cards). Unfortauntely, all my attempts to concat the strings and get a result end in failure. Any suggestions? NOTE: This is not homework it's something I'm using to create a game. // Locals char result[200] = ""; // Result int card[52]; // Array of cards srand(time(0)); // Initialize seed "randomly" // Build for (int i=0; i<52; i++) { card[i] = i; // fill the array in order } // Shuffle cards for (int i=0; i<(52-1); i++) { int r = i + (rand() % (52-i)); int temp = card[i]; card[i] = card[r]; card[r] = temp; } // Build result for (int c=0; c<52; c++) { // Build sprintf(result, "%d", card[c]); // Comma? if ( c < 51 ) { sprintf(result, "%s", ","); } } My end result is always garbled text. Thanks for the help.

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• StackOverFlowException - but oviously NO recursion/endless loop

  - by user567706

  Hi there, I'm now blocked by this problem the entire day, read thousands of google results, but nothing seems to reflect my problem or even come near to it... i hope any of you has a push into the right direction for me. I wrote a client-server-application (so more like 2 applications) - the client collects data about his system, as well as a screenshot, serializes all this into a XML stream (the picture as a byte[]-array]) and sends this to the server in regular intervals. The server receives the stream (via tcp), deserializes the xml to an information-object and shows the information on a windows form. This process is running stable for about 20-25 minutes at a submission interval of 3 seconds. When observing the memory usage there's nothing significant to see, also kinda stable. But after these 20-25 mins the server throws a StackOverflowException at the point where it deserializes the tcp-stream, especially when setting the Image property from the byte[]-array. I thoroughly searched for recursive or endless loops, and regarding the fact that it occurs after thousands of sucessfull intervals, i could hardly imagine that. public byte[] ImageBase { get { MemoryStream ms = new MemoryStream(); _screen.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg); return ms.GetBuffer(); } set { if (_screen != null) _screen.Dispose(); //preventing well-known image memory leak MemoryStream ms = new MemoryStream(value); try { _screen = Image.FromStream(ms); //<< EXCEPTION THROWING HERE } catch (StackOverflowException ex) //thx to new CLR management this wont work anymore -.- { Console.WriteLine(ex.Message + Environment.NewLine + ex.StackTrace); } ms.Dispose(); ms = null; } } I hope that more code would be unnecessary, or it could get very complex... Please help, i have no clue at all anymore thx Chris

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• uitableview reloadData issue

  - by CocoaNewBee

  I've been debugging my iphone app and found something interesting. I have a UIViewControllers with TabBarcontroller( 6 tabs). each tab is a UIViewController and it has a UITtableview. The viewDidLoad works and brings the initial data. On of the UITableView has a search bar. After the user touchs presses search some magic happens and I get an array with data. I cant see the new data in the tableview and the [tableView reloadData] has no effect outside viewDidLoad (first time). I can see the array holding the data and the dataSource is set to self. Yet, no displaying of data! so I 've tried [self.tableView reloadData] & [self.tableView setNeedsDisplay] Funny enough, the new data is not being displayed. However if I move the table up or down the cellForRowAtIndexPath is being fired and the first row shows data. can anyone shed some light on this mystery??? if there a [self.view refreshscreen] ??

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• SimpleDOM sortedXPath date sorting works on localhost but not on remote server.

  - by Imminent

  Here's what i'm trying to do: 1) Take a basic XML page (data.xml) 2) Load it with simpleDOM 3) Use simpleDOM sortedXPath to sort all XML items by their pubDate 4) Display sorted output Here is the code I currently have. My code below outputs exactly what I need when run it on my localhost (XAMPP w/PHP 5.3) but on my remote server (which has at least PHP 5.0+) all is lost and a completely blank page is output. It will output the $xml array with print_r though. Here is my code: <?php include('SimpleDOM.php'); $xml = simpledom_load_file('data.xml'); $dateformat = "D j M, g:ia"; /* print_r($xml); <-array will output on remote server if put here, but alas nothing else beyond this point */ /*Output First 5 items sorted by pubDate*/ foreach($xml->channel->sortedXPath('item','pubDate', SORT_DESC) as $i => $item){ if ($i > 4){ break; } print "<p>This Weeks Deal:<strong> ".$item->title."</strong></p>"; print $item->description; print "<p>Date Posted:<strong> ".date($dateformat, strtotime($item->pubDate))."</strong></p>"; } ?> Like I said, this code seems to work great on my localhost... but not being able to run it on my remote server is making me crazy. Any ideas ?? Any help will be far beyond appreciated.

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• Optimal Serialization of Primitive Types

  - by Greg Dean

  We are beginning to roll out more and more WAN deployments of our product (.Net fat client w/ IIS hosted Remoting backend). Because of this we are trying to reduce the size of the data on the wire. We have overridden the default serialization by implementing ISerializable (similar to this), we are seeing anywhere from 12% to 50% gains. Most of our efforts focus on optimizing arrays of primitive types. I would like to know if anyone knows of any fancy way of serializing primitive types, beyond the obvious? For example today we serialize an array of ints as follows: [4-bytes (array length)][4-bytes][4-bytes] Can anyone do significantly better? The most obvious example of a significant improvement, for boolean arrays, is putting 8 bools in each byte, which we already do. Note: Saving 7 bits per bool may seem like a waste of time, but when you are dealing with large magnitudes of data (which we are), it adds up very fast. Note: We want to avoid general compression algorithms because of the latency associated with it. Remoting only supports buffered requests/responses(no chunked encoding). I realize there is a fine line between compression and optimal serialization, but our tests indicate we can afford very specific serialization optimizations at very little cost in latency. Whereas reprocessing the entire buffered response into new compressed buffer is too expensive.

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• Minimal-change algorithm which maximises 'swapping'

  - by Kim Bastin

  This is a question on combinatorics from a non-mathematician, so please try to bear with me! Given an array of n distinct characters, I want to generate subsets of k characters in a minimal-change order, i.e. an order in which generation n+1 contains exactly one character that was not in generation n. That's not too hard in itself. However, I also want to maximise the number of cases in which the character that is swapped out in generation n+1 is the same character that was swapped in in generation n. To illustrate, for n=7, k=3: abc abd abe* abf* abg* afg aeg* adg* acg* acd ace* acf* aef adf* ade bde bdf bef bcf* bce bcd* bcg* bdg beg* bfg* cfg ceg* cdg* cde cdf* cef def deg dfg efg The asterisked strings indicate the case I want to maximise; e.g. the e that is new in generation 3, abe, replaces a d that was new in generation 2, abd. It doesn't seem possible to have this happen in every generation, but I want it to happen as often as possible. Typical array sizes that I use are 20-30 and subset sizes around 5-8. I'm using an odd language, Icon (or actually its derivative Unicon), so I don't expect anyone to post code that I can used directly. But I will be grateful for answers or hints in pseudo-code, and will do my best to translate C etc. Also, I have noticed that problems of this kind are often discussed in terms of arrays of integers, and I can certainly apply solutions posted in such terms to my own problem. Thanks Kim Bastin

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