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  • JavaFX - reduce() function to show how to pass functions as parameters

    - by Helper Method
    At the moment I'm writing a JavaFX guide for Java developers. In order to show how to pass a function to another funtion i adopted the reduce() function found in Effective Java: function reduce(seq: Integer[], f: function(: Integer, : Integer): Integer, init: Integer) { var result = init; for (i in seq) { result = f(i, result); } result } def nums = [1 .. 10]; println(reduce(nums, function(a: Integer, b: Integer) { a + b }, 0)); // prints 55 println(reduce(nums, function(a: Integer, b: Integer) { a * b }, 0)); // prints 3628800 Now I wonder if this example is not to hard for someone starting to learn JavaFX. The tutorial is targeted to programmers with a solid understanding of Java, yet I'm not quite sure about the usefulness of the example. Any ideas?

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  • Calcualting Optimal Site to Site Routing using pre-computed times between sites

    - by Idistic
    Assume that I have a number of sites (locations) and the time it takes to travel from each site to each site is pre-computed Example Data - Site to Site Pre-Calculated Times in minutes From Start Site To A 20 To B 15 To C 15 From Site A To B 10 To C 15 Site B To A 10 To C 20 Site C To A 15 To B 20 4 Sites is fairly simple, but what if the site set was say 1000 sites? Given a large site set What would the best approach be to quickly find the optimal routes from the start site while visiting every other site just once? Route Solutions from Start Site for 3 sites from a start site 1 A(20) B(10) C(20) = 50 2 A(20) C(15) B(20) = 55 3 B(15) A(10) C(15) = 40 4 B(15) C(20) A(15) = 50 5 C(15) A(15) B(10) = 40 6 C(15) B(20) A(10) = 45

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  • iPhone or Android for development?

    - by user974873
    I have programming experience and would like to start developing for mobile platforms. Now I see that iPhone and Android are both dominating he smartphone market, but also that more and more people are buying iPhones. Which one would be better to start developing for? I currently do not own a Mac but would purchase a Mac Mini if I was to buy an iPhone. Would it be better to buy iPhone and Mac because it will be better in the long run because of the amount of users or Android?

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  • How to use UISwipeGestureRecognizer on UIButton?

    - by Ashutosh
    I have a UIbutton which i want to work as a joystick. So i am trying to add some gesture recognizer on the same button. I have this in my code right now: UISwipeGestureRecognizer *recognizer; recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeFrom:)]; [recognizer setDirection:(UISwipeGestureRecognizerDirectionUp)]; [self.gestureRecieverButton addGestureRecognizer:recognizer]; [recognizer release]; recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeFrom:)]; [recognizer setDirection:(UISwipeGestureRecognizerDirectionDown)]; [self.gestureRecieverButton addGestureRecognizer:recognizer]; [recognizer release]; -(void)handleSwipeFrom:(UISwipeGestureRecognizer *)recognizer { NSLog(@"Swipe received.%@",recognizer); } This is the error i am getting now: -[CUETutorialSixteenClusterRootController handleSwipeFrom:]: unrecognized selector sent to instance 0x79b71b0 2012-03-28 13:25:55.724 CUETrainer[1788:11f03] * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[CUETutorialSixteenClusterRootController handleSwipeFrom:]: unrecognized selector sent to instance 0x79b71b0' But its not actually doing anything. Please help!!!!

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  • ModX: Selecting and outputting specific menu items using Wayfinder

    - by Staffan Estberg
    tI've been trying to output specific menu items, also wanting to change the names of some, without satisfying results. The problem is that I have three different menu setups throughout the site - the header split into two sections and the footer divided into a couple of columns. This is what I've tried so far - [[Wayfinder? &startId=0 &level=1 &limit=5 &excludeDocs=49,61,55]] While it works excluding all the other links isn's the most optimal solution as there are 11 in total plus I want to be able to 1. rearrange the order and 2. change the names of two of them. Is this possible at all using the Wayfinder or do I have to create a snippet? Thanks in advance.

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  • NSWindowController window?

    - by Ilija Tovilo
    I have a menu-bar based application, which displays a window, when the icon is clicked. It all works fine on Mac OS X Lion, but for some reason, an error occurs on Snow Leopard an sooner versions of Mac OS X. Anytime [TheWindowController window] is called the method stops, but the app keeps running. Because of this, I don't think that the window is just nil, it's corrupt, in some way. I have no Idea why this happens, and like I said, it only happens in Mac OS X Snow Leopard. Btw. I use ARC, if that matters at all. Thank you!

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  • How hard is it for a .NET programmer to learn Objective C and Cocoa?

    - by rsteckly
    Hi, I'm trying to build a dual platform application for a company of my own I'm trying to start at night. I have the .NET version done, but have not finished the UI part. I'm thinking of buying some 3rd party controls. If I buy these controls, however, they clearly will only work in my Windows version. I'm wondering if I should try to do the UI in GTK# and use Mono with CocoaSharp or just build the thing in MS technology and teach myself the Mac side? I'm just really unfamiliar with the Mac world and am wondering how much of a learning curve there might be. I've thought perhaps of rewriting my core logic in Ruby or Python. This why I could use the .NET version with .NET controls and presumably hook the same code up on the Mac. It's an educational app targeted at consumers. As such, it shouldn't require a lot of technical sophistication to install.

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  • How to return arrays with the biggest elements in C#?

    - by theateist
    I have multiple int arrays: 1) [1 , 202,4 ,55] 2) [40, 7] 3) [2 , 48 ,5] 4) [40, 8 ,90] I need to get the array that has the biggest numbers in all positions. In my case that would be array #4. Explanation: arrays #2, #4 have the biggest number in 1st position, so after the first iteration these 2 arrays will be returned ([40, 7] and [40, 8 ,90]) now after comparing 2nd position of the returned array from previous iteration we will get array #4 because 8 7 and so on... Can you suggest an efficient algorithm for this? Doing with Linq will be preferable. UPDATE There is no limitation for the length, but as soon as some number in any position is greater, so this array is the biggest.

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  • KeyError this says that key(partner) is not in dict ?

    - by Ansh Jain
    I am trying to make an chat application using python and django. I almost complete it and its working fine for 8-10 minutes when two persons are chatting after that certain time it shows an error. here is the traceback : - Traceback (most recent call last): File "\Django_chat\django_chat\chat\views.py", line 55, in receive message = chatSession.getMessage(request.session['partner'],request.session['uid'],afterTime) File "C:\Python26\lib\site-packages\django\contrib\sessions\backends\base.py", line 47, in __getitem__ return self._session[key] KeyError: 'partner' here is the receive module :- def receive(request): message received by this user chatSession = chat() data = request.POST afterTime = data['lastMsgTime'] try: message = chatSession.getMessage(request.session['partner'],request.session['uid'],afterTime) except: #partnerId = virtual_users.objects.get(id=request.session['uid']).partner print('there is an error in receive request') traceback.print_exc(file=open("/myapp.log","a")) msg = serializers.serialize("json", message) return HttpResponse(msg) Please Help me :( thanks Ansh J

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  • php preg_replace, regexp

    - by Michael
    I'm trying to extract the postal codes from yell.com using php and preg_replace. I successfully extracted the postal code but only along with the address. Here is an example $URL = "http://www.yell.com/ucs/UcsSearchAction.do?scrambleSeed=17824062&keywords=shop&layout=&companyName=&location=London&searchType=advance&broaderLocation=&clarifyIndex=0&clarifyOptions=CLOTHES+SHOPS|CLOTHES+SHOPS+-+LADIES|&ooa=&M=&ssm=1&lCOption32=RES|CLOTHES+SHOPS+-+LADIES&bandedclarifyResults=1"; //get yell.com page in a string $htmlContent = $baseClass-getContent($URL); //get postal code along with the address $result2 = preg_match_all("/(.*)/", $htmlContent, $matches); print_r($matches); The above code ouputs something like Array ( [0] = Array ( [0] = 7, Royal Parade, Chislehurst, Kent BR7 6NR [1] = 55, Monmouth St, London, WC2H 9DG .... the problem that I have is that I don't know how to extract the the postal code because it doesn't have an exact number of digits (sometimes it has 6 digits and sometimes has only 5 times). Basically I should extract the lasted 2 words from each array . Thank you in advance for any help !

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  • How do I select a fixed number of rows for each group?

    - by Maiasaura
    Here is some example data in a mysql table a b distance 15 44 250 94 31 250 30 41 250 6 1 250 95 18 250 72 84 500 14 23 500 55 24 500 95 8 500 59 25 500 40 73 500 65 85 500 32 50 500 31 39 500 22 25 500 37 11 750 98 39 750 15 57 750 9 22 750 14 44 750 69 22 750 62 50 750 89 35 750 67 65 750 74 37 750 52 36 750 66 53 750 82 74 1000 79 22 1000 98 41 1000 How do I query this table such that I get 2 rows per distance selected at random? A successful query will produce something like a b distance 30 41 250 95 18 250 59 25 500 65 85 500 15 57 750 89 35 750 79 22 1000 98 41 1000

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  • bitshift large strings for encoding QR Codes

    - by icekreaman
    As an example, suppose a QR Code data stream contains 55 data words (each one byte in length) and 15 error correction words (again one byte). The data stream begins with a 12 bit header and ends with four 0 bits. So, 12 + 4 bits of header/footer and 15 bytes of error correction, leaves me 53 bytes to hold 53 alphanumeric characters. The 53 bytes of data and 15 bytes of ec are supplied in a string of length 68 (str68). The problem seems simple enough - concatenate 2 bytes of (right-shifted) header data with str68 and then left shift the entire 70 bytes by 4 bits. This is the first time in many years of programming that I have ever needed to do something like this, I am a c and bit shifting noob, so please be gentle... I have done a little investigation and so far have not been able to figure out how to bitshift 70 bytes of data; any help would be greatly appreciated. Larger QR codes can hold 2000 bytes of data...

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  • Integrate Python Projects Into Xcode

    - by Vynile
    Hi! I'm a Mac user, and one of my hobbies is programming. I use Xcode, the integrated IDE of Mac OS X. I started to learn Python programming langage, and I want to use Xcode for developing my scripts. I searched for weeks in the internet, but I didn't find something interesting. Firstly, I want to update the integrated interpreter of Mac OS X, that is on 2.6 version. And secondly, I want to create a Python project on Xcode easily, like I do with C & C++ projects. Can you help me? I really need help! Cordially.

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  • Writing iPhone apps on linux - What tools do you need

    - by Sia.G
    Hello. I wanted to know if it's possible to WRITE and COMPILE/TEST iPhone apps on a linux platform. I've been on google for a couple of days now, and people either talk about "Mac OS X only!", or "Develop jailbroke apps on Linux". My dev partner has a mac and has a certificate to sign the apps. I don't have a mac, but I will be doing most of the development. So what I want to do is simply develop/test the app in linux, and when it's finished, simply hand over the code to him, who will then compile the finalized app and sign it ready for submission to the app store. Could anyone tell me what linux tools I would need to accomplish this?

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  • What's your favorite implementation of producing the fibonacci sequence?

    - by Terry Donaghe
    Best, most creative, most clever, fastest, smallest, written in weirdest language, etc etc. For those not familiar with this staple of programming exam question / interview question, check this out: Fibonacci Sequence at Wikipedia The question would be, write a simple program which will spit out the first n digits of the Fibonacci sequence. So, if n == 12, we produce: 0 1 1 2 3 5 8 13 21 34 55 89 144 Your implementation becomes more interesting when you set n to larger values. How long does it take your implementation to return a 25 digit sequence? How about 100?

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  • LLVM Clang 5.0 explicit in copy-initialization error

    - by kevzettler
    I'm trying to compile an open source project on OSX that has only been tested on Linux. $: g++ -v Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1 Apple LLVM version 5.0 (clang-500.2.79) (based on LLVM 3.3svn) Target: x86_64-apple-da I'm trying to compile with the following command line options g++ -MMD -Wall -std=c++0x -stdlib=libc++ -Wno-sign-compare -Wno-unused-variable -ftemplate-depth=1024 -I /usr/local/Cellar/boost/1.55.0/include/boost/ -g -O3 -c level.cpp -o obj-opt/level.o I am seeing several errors that look like this: ./square.h:39:70: error: chosen constructor is explicit in copy-initialization int strength = 0, double flamability = 0, map<SquareType, int> constructions = {}, bool ticking = false); The project states the following are requirements for the Linux setup. How can I confirm I'm making that? gcc-4.8.2 git libboost 1.5+ with libboost-serialize libsfml-dev 2+ (Ubuntu ppa that contains libsfml 2: ) freeglut-dev libglew-dev

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  • Howto Plot "Reverse" Cumulative Frequency Graph With ECDF

    - by neversaint
    I have no problem plotting the following cumulative frequency graph plot like this. library(Hmisc) pre.test <- rnorm(100,50,10) post.test <- rnorm(100,55,10) x <- c(pre.test, post.test) g <- c(rep('Pre',length(pre.test)),rep('Post',length(post.test))) Ecdf(x, group=g, what="f", xlab='Test Results', label.curves=list(keys=1:2)) But I want to show the graph in forms of the "reverse" cumulative frequency of values x ? (i.e. something equivalent to what="1-f"). Is there a way to do it? Other suggestions in R other than using Hmisc are also very much welcomed.

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  • Toast on top of ListView in Android?

    - by sunil
    Hi, I have a listview in my Android Application. Now, when the user presses Next Button other contents will be loaded into the listview. What I want is that if there are no more contents available then there should be a toast displayed indicating that there are no more data available. Say, for example I have a total of 55 data available and I am displaying only 30 of them in one listview. So, when the user presses Next for the first time next 25 records will be visible. If the user again presses the Next button then a toast should be displayed on top of the last listview that had last 25 records. Currently I get an error as IndexOutOfBoundException : Invalid location 15 size is 1. Can someone suggest how is it possible? Regards Sunil

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  • How can I collapse a dataframe by some variables, taking mean across others

    - by Alex Holcombe
    I need to summarize a data frame by some variables, ignoring the others. This is sometimes referred to as collapsing. E.g. if I have a dataframe like this: Widget Type Energy egg 1 20 egg 2 30 jap 3 50 jap 1 60 Then collapsing by Widget, with Energy the dependent variable, Energy~Widget, would yield Widget Energy egg 25 jap 55 In Excel the closest functionality might be "Pivot tables" and I've worked out how to do it in python (http://alexholcombe.wordpress.com/2009/01/26/summarizing-data-by-combinations-of-variables-with-python/), and here's an example with R using doBy library to do something very related (http://www.mail-archive.com/[email protected]/msg02643.html), but is there an easy way to do the above? And even better is there anything built into the ggplot2 library to create plots that collapse across some variables?

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  • How to: Display multiple related classes in an ASP.NET GridView ?

    - by kversch
    I would like to display students and their grades with a GridView and LinqToSQL like this: assignment1 assignment2 Student 1 55 89 Student 2 87 56 Student 3 92 34 I found this topic but it doesn't answer my question: http://forums.asp.net/t/1557987.aspx I have a many-to-many relationship between students and assignments called "grades". The grade for the assignment is stored in that table in a "gradeNumber" column. I would also like to specify which assignments should be displayed in the grid. Btw, my LINQ entities are extended to allow me to write/get studentx.Assignments or assignmentx.Students.

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  • HOw to find specific child node in XML using AS3 flash

    - by Mirage
    I have this xml var testXML:XML = <family> <father name1="tom" age="5" ><father1 name1="test1"/><father2 name1="test2"/></father> <mother name1="tomylee" age="55" ><mother1/><mother2/></mother> <sister name1="sister1" age="35" ><sister1/><sister2/></sister> </family>; I want to get the child node with name1 = test1 but i only know family so is there something like trace (testXML.children(@name1="test1"); I only know the family node , i don't know where that node is inside the father or not is there any filter can be applied on root node to find something

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  • How can I enable auto-updates in a Qt cross-platform app?

    - by FX
    I love applications that are able to update themselves without any effort from the user (think: Sparkle framework for Mac). Is there any code/library I can leverage to do this in a Qt app, without having to worry about the OS details? At least for Windows/Mac/user-owned-linux-binaries. I could integrate Sparkle on the Mac version, code something for the linux case (only for a standalone, user-owned binary; I won't mess with distros packaging, if my program is ever packaged), and find someone to help me on the Windows side, but that's horribly painful. Surely I'm not the only one who wants to provide this to users?

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  • How to maipulate the shell output in php

    - by Mirage
    I am trying to write php script which does some shell functions like reporting. So i am starting with diskusage report I want in following format drive path ------------total-size --------free-space Nothing else My script is $output = shell_exec('df -h -T'); echo "<pre>$output</pre>"; and its ouput is like below Filesystem Type Size Used Avail Use% Mounted on /dev/sda6 ext3 92G 6.6G 81G 8% / none devtmpfs 3.9G 216K 3.9G 1% /dev none tmpfs 4.0G 176K 4.0G 1% /dev/shm none tmpfs 4.0G 1.1M 4.0G 1% /var/run none tmpfs 4.0G 0 4.0G 0% /var/lock none tmpfs 4.0G 0 4.0G 0% /lib/init/rw /dev/sdb1 ext3 459G 232G 204G 54% /media/Server /dev/sdb2 fuseblk 466G 254G 212G 55% /media/BACKUPS /dev/sda5 fuseblk 738G 243G 495G 33% /media/virtual_machines How can i convert that ouput into my forn\matted output

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  • What am I missing in my compilation / linking stage of this C++ FreeType GLFW application?

    - by anon
    g++ -framework OpenGL GLFT_Font.cpp test.cpp -o test -Wall -pedantic -lglfw -lfreetype - pthread `freetype-config --cflags` Undefined symbols: "_GetEventKind", referenced from: __glfwKeyEventHandler in libglfw.a(macosx_window.o) __glfwMouseEventHandler in libglfw.a(macosx_window.o) __glfwWindowEventHandler in libglfw.a(macosx_window.o) "_ShowWindow", referenced from: __glfwPlatformOpenWindow in libglfw.a(macosx_window.o) "_MenuSelect", referenced from: This is on Mac OS X. I am trying to get GLFT_FONT to work on MacOSX with GLFW and FreeType2. This is not the standard Makefile. I changed parts of it myself (like the "-framework OpenGL" I am from Linux land, a bit new to Mac. I am on Mac OS X 10.5.8; using XCode 3.1.3 Thanks!

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  • How to properly override Drupal imagecache presets

    - by volocuga
    Say I need to override defaul presets, provided by Ubercart module. This is what I wrote: function config_imagecache() { $presets = array( array( 'presetname' => 'product', 'actions' => array( array( 'action' => 'imagecache_crop', 'data' => array('width' => 300, 'height' => ''), 'weight' => 0, 'module' => 'imagecache', ), array( 'action' => 'canvasactions_canvas2file', 'data' => array('xpos' => 'center', 'ypos' => 'center', 'path' => 'actions/pad_300_300.gif', 'dimensions' => 'background',), 'weight' => 1, 'module' => 'imagecache_canvasactions', ), ), ), array( 'presetname' => 'uc_thumbnail', 'actions' => array( array( 'action' => 'imagecache_scale', 'data' => array('width' => 55, 'height' => 55, 'upscale' => 0), 'weight' => 0, 'module' => 'imagecache', ), array( 'action' => 'canvasactions_canvas2file', 'data' => array('xpos' => 'center','ypos' => 'center', 'path' => 'actions/pad_60_60.gif','dimensions' => 'background'), 'weight' => 1, 'module' => 'imagecache_canvasactions', ), ), ), array( 'presetname' => 'product_full', 'actions' => array( array( 'action' => 'imagecache_scale', 'data' => array('width' => 600, 'height' => 600, 'upscale' => 0), 'weight' => 0, 'module' => 'imagecache', ), ), ), array( 'presetname' => 'product_list', 'actions' => array( array( 'action' => 'imagecache_scale', 'data' => array('width' => 100, 'height' => 100, 'upscale' => 0), 'weight' => 0, 'module' => 'imagecache', ), array( 'action' => 'canvasactions_canvas2file', 'data' => array('xpos' => 'center', 'ypos' => 'center', 'path' => 'actions/pad_100_100.jpg','dimensions' => 'background',), 'weight' => 1, 'module' => 'imagecache_canvasactions', ), ), ), array( 'presetname' => 'uc_category', 'actions' => array( array( 'action' => 'imagecache_scale', 'data' => array('width' => 100, 'height' => 100, 'upscale' => 0), 'weight' => 0, 'module' => 'imagecache', ), array( 'action' => 'canvasactions_canvas2file', 'data' => array('xpos' => 'center', 'ypos' => 'center', 'path' => 'actions/pad_100_100.gif', 'dimensions' => 'background',), 'weight' => 1, 'module' => 'imagecache_canvasactions', ), ), ), array( 'presetname' => 'cart', 'actions' => array( array( 'action' => 'imagecache_scale', 'data' => array('width' => 50, 'height' => 50, 'upscale' => 0), 'weight' => 0, 'module' => 'imagecache', ), array( 'action' => 'canvasactions_canvas2file', 'data' => array('xpos' => 'center', 'ypos' => 'center', 'path' => 'actions/pad_60_60.gif', 'dimensions' => 'background',), 'weight' => 1, 'module' => 'imagecache_canvasactions', ), ), ), ); foreach ($presets as $preset) { drupal_write_record('imagecache_preset', $preset); foreach ($preset['actions'] as $action) { $action['presetid'] = $preset['presetid']; drupal_write_record('imagecache_action', $action); } } imagecache_presets(true); cache_clear_all('imagecache:presets', 'cache'); } I can see in imagecache UI the settings was applied, but really images disappeared at all. Nothing works now. Where is the mistake?

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