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  • Inserting an element into a sorted list

    - by Russell Cargill
    Ok I'm using getSharedPreferences to store my high score but before I fill it up I wanted to sort the scores into ascending order via and array, but if it finds a Score less than it in the first pos then it wont check the rest for the smallest? //function to add score to array and sort it public void addscoretoarray(int mScore){ for(int pos = 0; pos< score.length; pos++){ if(score[pos] > mScore){ //do nothing }else { //Add the score into that position score[pos] = mScore; break; } } sortArray(score); } should I call sortArray() before and after the loop to fix this problem or is there a better method to achive the same results? I should also mention that the sortArray(score) funtion is just calling Arrays.sort(score) where score is an array of mScore

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  • Where is the bottleneck in this code?

    - by Mikhail
    I have the following tight loop that makes up the serial bottle neck of my code. Ideally I would parallelize the function that calls this but that is not possible. //n is about 60 for (int k = 0;k < n;k++) { double fone = z[k*n+i+1]; double fzer = z[k*n+i]; z[k*n+i+1]= s*fzer+c*fone; z[k*n+i] = c*fzer-s*fone; } Are there any optimizations that can be made such as vectorization or some evil inline that can help this code? I am looking into finding eigen solutions of tridiagonal matrices. http://www.cimat.mx/~posada/OptDoglegGraph/DocLogisticDogleg/projects/adjustedrecipes/tqli.cpp.html

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  • PHP: Is there an elegant way to foreach through multiple items (groups) at a time?

    - by acheong87
    Given an array of N items: $arr = array('a', 'b', 'c', 'd', 'e', 'f'); What's the most elegant way to loop through in groups of M items (assuming N is divisible by M)? I tried foreach (array_chunk($arr, 2) as list($first, $second)) { // do stuff with $first and $second } but this resulted in a syntax error. In other words, I want to emulate what in Tcl would look like this: set arr [a b c d e f] foreach {first second} $arr { // do stuff with $first and $second } For now I've resorted to the obvious measure: foreach (array_chunk($arr, 2) as $group) { $first = $group[0]; $second = $group[1]; // do stuff with $first and $second } But I'm hoping someone has a more elegant method...

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  • Given a word, how do I get the list of all words, that differ by one letter?

    - by user187809
    Let's say I have the word "CAT". These words differ from "CAT" by one letter (not the full list) CUT CAP PAT FAT COT etc. Is there an elegant way to generate this? Obviously, one way to do it is through brute force. pseduo code: while (0 to length of word) while (A to Z) replace one letter at a time, and check if the resulting word is a valid word If I had a 10 letter word, the loop would run 26 * 10 = 260 times. Is there a better, elegant way to do this?

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  • C++ - Access array (in main) from methods outside main

    - by John Smith
    I have an array in my main class that holds objects that I need to print out for a menu listing. The array is declared and initialized in main. I need to, however, access the same array in a sub-menu function. If I copy the code (for loop that prints out the values) to the sub-menu, nothing is printed (presumably because it can't access the original array and has made a new, blank one). Is there any way (without making the array a global variable) that I can access the array in this sub-menu? Both the main and the sub-menu function are in the same file and the sub-menu is called from main. Maybe to put it more simply, can I use scope resolution to bring me up one 'level' in scope?

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  • C#.NET : A graphical control makes my app freeze after workstation unlock

    - by leo
    Hi, I have a graphical control that is multithreaded. Until now it worked fine, but I just noticed that whenever I'm on my application showing this control the following happens: if I lock and unlock my workstation, it freezes, like if it were in some kind of infinite loop. Even stranger, this bug occurs only when I'm not lauching the app from Visual Studio, and not attached to it. Does anyone have a clue on what's happening? For instance, if I attach Visual Studio to the already freezed app, can I see which lines of code my threads are executing ? Any help will be appreciated!

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  • How to receive packets on the MCU's serial port?

    - by itisravi
    Hello, Consider this code running on my microcontroller unit(MCU): while(1){ do_stuff; if(packet_from_PC) send_data_via_gpio(new_packet); //send via general purpose i/o pins else send_data_via_gpio(default_packet); do_other_stuff; } The MCU is also interfaced to a PC via a UART.Whenever the PC sends data to the MCU, the *new_packet* is sent, otherwise the *default_packet* is sent.Each packet can be 5 or more bytes with a pre defined packet structure. My question is: 1.Should i receive the entire packet from PC using inside the UART interrut service routine (ISR)? In this case, i have to implement a state machine inside the ISR to assemble the packet (which can be lengthy with if-else or switch-case blocks). 2.Detect a REQUEST command (one byte)from the PC in my ISR set a flag, diable UART interrupt alone and form the packet in my while(1) loop by polling the UART?

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  • Mod Rewrite - Simple Question

    - by bob
    This is my current .htaccess Options +FollowSymLinks DirectoryIndex index.php RewriteEngine On RewriteBase /product/ RewriteCond %{ENV:REDIRECT_STATUS} ^$ RewriteRule ^(.+)\.php$ ./$1/ [R=301,L] RewriteCond %{SCRIPT_FILENAME} !-f RewriteRule [^/]$ %{REQUEST_URI}/ [R=301,L] RewriteRule ^contact/?$ ./contact.php [QSA,L] Everything is working fine now.. /product/contact return to /product/contact/ /product/contact.php return to /product/contact/ Question.. How to make all my .php will be /contact/ /help/ /faq/ Now I should to add contact.php help.php faq.php to the htaccess I tried to add RewriteRule ^(.*)/$ $1.php [QSA,L] but it will be return loop. Let me know how to fix it ;)

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  • What is the best way of retrieving a specific post in Wordpress?

    - by Steven
    I need to retrieve a specific post to display on my websites front page. To avoid hard coding the post ID, I've added a custom property where I add the post ID. The following code displays the wanted post: (The code is within the LOOP) // Get content from specific post (in this case, Åpningstider post)) $openingHoursID = get_post_meta($post->ID, "apningstider", true); if (!empty($openingHoursID)) { $openingHoursPost = get_post($openingHoursID); $openingHours = $openingHoursPost->post_content; } else $openingHours = "Åpningstid ikke angitt"; <div class="openinghours"><?php echo $openingHours; ?></div> Is there a better / easier way? The output is striped for HTML. How can I maintain HTML?

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  • Unread email notifier, most practical approach

    - by Michael Pasqualone
    I'm in the process of writing a small php-cli script that will loop over over my personal inbox and then send me an SMS via a gateway. The question I have is: As will have the script launch via cron every 10 minutes, if there is an email sitting in my inbox that is not read before the next script launch then I will receive 2 sms. Does any one (pseudocode will do) have any idea what the best practice would be in php5 to ensure only 1 SMS is sent? What I am currently learning towards is towards storing the message ID in a sqlite DB and flagging a field whether an SMS has been sent or not - but wondering if there is an easier way?

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  • Cakephp, an elegant solution to quantities?

    - by Smickie
    Hi, I have a shopping cart system in Cakephp, this table has all your usual maguffins: user_ids, product_ids, option_lists ect. It also has quantity. I currently have some awful nested loops to check if the record is the same as any in there, if so add one to the quantity. If not add a new cart item. This loop has to check associated list items and product options, so it goes quite deep. What I'm wondering is if there is a more elegant way of checking to see if two cart items in a database are similar (everything except for quantity). Cheers!

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  • Playing animations in sequence in objecive c

    - by Ohmnastrum
    I'm trying to play animations in sequence but i'm having issues playing them as a for loop iterates through the list of objects in an array. it will move through the array but it won't play each one it just plays the last... -(void) startGame { gramma.animationDuration = 0.5; // Repeat forever gramma.animationRepeatCount = 1; int r = arc4random() % 4; [colorChoices addObject:[NSNumber numberWithInt:r]]; int anInt = [[colorChoices objectAtIndex:0] integerValue]; NSLog(@"%d", anInt); for (int i = 0; i < colorChoices.count; i++) { [self StrikeFrog:[[colorChoices objectAtIndex:i] integerValue]]; //NSLog(@"%d", [[colorChoices objectAtIndex:i] integerValue]); sleep(1); } } it moves through the whole cycle really fast and sleep isn't doing anything to allow it to play each animation... any suggestions?

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  • How can i convert a string into byte[] of unsigned int 32 C#

    - by Miroo
    i have string like "0x5D, 0x50, 0x68, 0xBE, 0xC9, 0xB3, 0x84, 0xFF" i wanna convert it into byte[] key= new byte[] { 0x5D, 0x50, 0x68, 0xBE, 0xC9, 0xB3, 0x84, 0xFF}; i thought about splitting the string by ',' then loop on it and setvalue into another byte[] in index of i string Key = "0x5D, 0x50, 0x68, 0xBE, 0xC9, 0xB3, 0x84, 0xFF"; string[] arr = Key.Split(','); byte[] keybyte= new byte[8]; for (int i = 0; i < arr.Length; i++) { keybyte.SetValue(Int32.Parse(arr[i].ToString()), i); } but seems like it doesn't work i get error in converting the string into unsigned int32 on the first beginning an help would be appreciated

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  • Linux reboot() system call: why it calls do_exit(0) after kernel_halt()?

    - by axeoth
    This is related to: http://stackoverflow.com/a/13413099/1284631 Now, the question is: Why the reboot() system call, when called with LINUX_REBOOT_CMD_HALT parameter (see here: http://lxr.linux.no/linux+v3.6.6/kernel/sys.c#L480) is calling do_exit(0) after having already called kernel_halt(), as calling kernel_halt() boils down to calling stop_this_cpu() (see here: http://lxr.linux.no/linux+v3.6.6/arch/x86/kernel/process.c#L519), as part of native_machine_halt() (see here: http://lxr.linux.no/linux+v3.6.6/arch/x86/kernel/reboot.c#L680). Or, it seems to me that stop_this_cpu() is never returning (it ends with an infinite loop). So, it is do_exit(0) called just in case that kernel_halt() doesn't do its job and it return? Why not panic() directly instead, then?

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  • jQuery text attribute selector

    - by Shagglez
    I am trying to use the text attribute as a selector, but I can't quite grasp the behaviour, would really appreciate if someone could explain. For example given <span class="span_class"><a class="a_class">text</a></span>, $('a.a_class').text() gives "text" as expected. However $('a.a_class[text]') wouldn't match any elements, and neither would $('span.span_class > a.a_class[text]'), but $('span.span_class* > a.a_class[text]') would (although not in IE). The only workaround I can think of for IE, is loop through all anchors contained in a span, use .text() on each and match it against a certain criteria, but it seems slower than using in-built selectors. Anyone have better ideas?

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  • Can't catch newConnection() signal from QTcpServer

    - by Bob
    I am trying to make a simple server thread in QT to accept a connection, however although the server is listening (I can connect with my test app) I can't get the newConnection() signal to be acted on. Any help as to what I'm missing here would be much appreciated! class CServerThread : public QThread { Q_OBJECT protected: void run(); private: QTcpServer* server; public slots: void AcceptConnection(); }; void CServerThread::run() { server = new QTcpServer; QObject::connect(server, SIGNAL(newConnection()), this, SLOT(AcceptConnection())); server-listen(QHostAddress::Any, 1000); // Any port in a storm exec(); // Start event loop } void CServerThread::AcceptConnection() { OutputDebugStringA("\n***** INCOMING CONNECTION"); // This is never called! }

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  • How to debug Perl program sudden exits?

    - by taw
    I have Perl program based on io::async, and it sometimes just exits after a few hours/days without printing any error message whatsoever. There's nothing in dmesg or /var/log either. STDOUT/STDERR are both autoflush(1) so data shouldn't be lost in buffers. It doesn't actually exit from IO::Async::Loop->loop_forever - print I put there just to make sure of that never gets triggered. Now one way would be to keep peppering the program with more and more prints and hope one of them gives me some clue. Is there better way to get information what was going on in a program that made it exit/silently crash?

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  • How do I clear the contents of a file using c?

    - by Eddy
    I'm writing some code so that at each iteration of a for loop it runs a functions which writes data into a file, like this: int main() { int i; /* Write data to file 100 times */ for(i = 0; i < 100; i++) writedata(); return 0; } void writedata() { /* Create file for displaying output */ FILE *data; data = fopen("output.dat", "a"); /* do other stuff */ ... } How do I get it so that when I run the program it will delete the file contents at the beginning of the program, but after that it will append data to the file? I know that using the "w" identifier in fopen() will open a new file that's empty, but I want to be able to 'append' data to the file each time it goes through the 'writedata()' function, hence the use of the "a" identifier.

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  • Summation using Lambda C# 3.0

    - by Newbie
    I have a small thing. public int GetSum(List<int> x) { foreach (int i in x) sum += i; return sum; } where x is a List of integers defined as List<int> l = new List<int>(); l.Add(4); l.Add(2); l.Add(5); l.Add(8); l.Add(6); and has been passed as GetSum(l) Is it possible to rewrite the above foreach loop using a lambda? Reason: I started looking into the lambda stuffs since yesterday and is interested to learn .. however simple it may be. Thanks.

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  • Process.WaitForExit not triggering with __debugbreak

    - by Cypher2100
    I'm trying to write a program to test student code against a good implementation. I have a C++ console app that will run one test at a time determined by the command line args and a C# .net forms app that calls the c++ app once for each test. The goal is to be able to detect not just pass/fail for each test, but also "infinite" (5secs) loop and exceptions (their code dying for whatever reason). The problem is that not all errors kill the C++ app. If they corrupt the heap the system calls __debugbreak which pops up a window saying Debug Error! HEAP CORRUPTION DETECTED... My C# app is using Process.WaitForExit(5000) to wait, but this error doesn't count as an exit, so I see a timeout. So my question is, how can I either get the C# app to detect that this is an error OR how can I get the C++ app to die when this error occurs rather than giving a dialog box and asking if I want to debug?

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  • Override Django inlineformset_factory has_changed() to always return True

    - by John
    Hi, I am using the django inlineformset_factory function. a = get_object_or_404(ModelA, pk=id) FormSet = inlineformset_factory(ModelA, ModelB) if request.method == 'POST': metaform = FormSet (instance=a, data=request.POST) if metaform.is_valid(): f = metaform.save(commit=False) for instance in f: instance.updated_by = request.user instance.save() else: metaform = FormSet(instance=a) return render_to_response('nodes/form.html', {'form':metaform}) What is happening is that if I change any of the data then everything works ok and all the data gets updated. However if I don't change any of the data then the data is not updated. i.e. only entries which are changed go through the for loop to be saved. I guess this makes sense as there is no point saving data if it has not changed. However I need to go through and save every object in the form regardless of whether it has any changes on not. So my question is how do I override this so that it goes through and saves every record whether it has any changes or not? Hope this makes sense Thanks

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  • Elegant way to reverse order Formtastic nested objects?

    - by stephan.com
    I'm presenting a list of items to the user with a field for a new item, like this: - current_user.tasks.build - semantic_form_for current_user do |f| - f.semantic_fields_for :tasks do |t| - t.inputs do = t.input :_destroy, :as => :boolean, :label => '' - if t.object.new_record? = t.input :name, :label => false - else = t.object.name Which looks lovely and works like a charm. My only problem is I want the new record at the TOP of the list, not the bottom. Is there an elegant and easy way to do this, or am I going to have to do the new element separately, or loop through the list manually?

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  • Image Upload directly from client to remote server? Spring/Tomcat

    - by Prem
    Just wondering what the common solution is for this. We have two web servers that are load balanced and a separate server that holds our images. Our current process is that a user uploads an image directly to the web server (which ever they are connected to) and we enter a job into our DB. Another process checks for image jobs every few mins and copies the image from the web server up to the image server. The delay from when a user uploads to when its visible is not ideal. We could tighten the loop on how often we check for image jobs but ideally I would like to have user uploaded images to go directly to the image server rather than copying twice. How should this be done? Is there anything in spring to deal with this ? Seems like how most would deal with a CDN i would think? I want to limit the time it takes for an image that a user uploads is available on our site...

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  • Better data-structure design

    - by Tempname
    Currently in my application I have a single table that is giving me a bit of trouble. The issue at hand is I have a value object that is mapped to this table. When the data is returned to me as an array of value objects, I have to then loop through this array and begin my recursion by matching the ParentID to parent ObjectID's. The column ParentID is either null (acts a parent) or it holds the value of an ObjectID. I know there has to be a better way to create this data structure so that I do not have to do recursive loops to match ParentID's with their ObjectID's. Any help with this is greatly appreciated. Here is the table in describe form: +----------------+------------------+------+-----+---------------------+-----------------------------+ | Field | Type | Null | Key | Default | Extra | +----------------+------------------+------+-----+---------------------+-----------------------------+ | ObjectID | int(11) unsigned | NO | PRI | NULL | auto_increment | | ObjectHeight | decimal(6,2) | NO | | NULL | | | ObjectWidth | decimal(6,2) | NO | | NULL | | | ObjectX | decimal(6,2) | NO | | NULL | | | ObjectY | decimal(6,2) | NO | | NULL | | | ObjectLabel | varchar(255) | NO | | NULL | | | TemplateID | int(11) unsigned | NO | MUL | NULL | | | ObjectTypeID | int(11) unsigned | NO | MUL | NULL | | | ParentID | int(11) unsigned | YES | MUL | NULL | | | CreationDate | datetime | YES | | 0000-00-00 00:00:00 | | | LastModifyDate | timestamp | YES | | NULL | on update CURRENT_TIMESTAMP | +----------------+------------------+------+-----+---------------------+-----------------------------+e

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  • Import a number of csv files and replace NA by Zeros

    - by tao.hong
    I know how to do this individually. However, I have more than 1000 files. I decided to use a for loop. However, it seems like I did not find the correct way to evaluate my variables. Here is my code setwd('C:/data') filenames=dir() #find file names for (i in filenames){ adt = substr(x = i, start = 1, stop = nchar(i)-4) name=paste("data_", adt, sep="") assign(name, read.csv(i,header=T,sep=",")) #read each file and assign a variable name starting with data_ to it func=paste('name[is.na(name)] <- 0',sep="") # here is the place I have problem. R will not consider name is a parameter whose values change in each iteration eval((text=func)) }

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