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  • In Haskell, how can you sort a list of infinite lists of strings?

    - by HaskellNoob
    So basically, if I have a (finite or infinite) list of (finite or infinite) lists of strings, is it possible to sort the list by length first and then by lexicographic order, excluding duplicates? A sample input/output would be: Input: [["a", "b",...], ["a", "aa", "aaa"], ["b", "bb", "bbb",...], ...] Output: ["a", "b", "aa", "bb", "aaa", "bbb", ...] I know that the input list is not a valid haskell expression but suppose that there is an input like that. I tried using merge algorithm but it tends to hang on the inputs that I give it. Can somebody explain and show a decent sorting function that can do this? If there isn't any function like that, can you explain why? In case somebody didn't understand what I meant by the sorting order, I meant that shortest length strings are sorted first AND if one or more strings are of same length then they are sorted using < operator. Thanks!

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  • List of Lists of different types

    - by themarshal
    One of the data structures in my current project requires that I store lists of various types (String, int, float, etc.). I need to be able to dynamically store any number of lists without knowing what types they'll be. I tried storing each list as an object, but I ran into problems trying to cast back into the appropriate type (it kept recognizing everything as a List<String>). For example: List<object> myLists = new List<object>(); public static void Main(string args[]) { // Create some lists... // Populate the lists... // Add the lists to myLists... for (int i = 0; i < myLists.Count; i++) { Console.WriteLine("{0} elements in list {1}", GetNumElements(i), i); } } public int GetNumElements(int index) { object o = myLists[index]; if (o is List<int>) return (o as List<int>).Count; if (o is List<String>) // <-- Always true!? return (o as List<String>).Count; // <-- Returning 0 for non-String Lists return -1; } Am I doing something incorrectly? Is there a better way to store a list of lists of various types, or is there a better way to determine if something is a list of a certain type?

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  • Problem with using malloc in link lists (urgent ! help please)

    - by Abhinav
    I've been working on this program for five months now. Its a real time application of a sensor network. I create several link lists during the life of the program and Im using malloc for creating a new node in the link. What happens is that the program suddenly stops or goes crazy and restarts. Im using AVR and the microcontroller is ATMEGA 1281. After a lot of debugging I figured out that that the malloc is causing the problem. I do not free the memory after exiting the function that creates a new link so Im guessing that this is eventually causing the heap memory to overflow or something like that. Now if I use the free() function to deallocate the memory at the end of the function using malloc, the program just gets stuck when the control reaches free(). Is this because the memory becomes too clustered after calling free() ? I also create reference tables for example if 'head' is a new link list and I create another list called current and make it equal to head. table *head; table *current = head; After the end of the function if I use free free(current); current = NULL: Then the program gets stuck here. I dont know what to do. What am I doing wrong? Is there a way to increase the size of the heap memory Please help...

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  • Mailman aggregate mailing lists

    - by s1nny
    Using CENTOS 5.10, WHM, CpanelX I'm setting up mailing lists for my company (microsoft exchange costs too much for the number of users we have). So I've got a few mailing lists set up right now @Naples, @Cayman, @ACK, @Managers etc which are all set up and working nicely. Now I need to create an aggregate list, @Stores, which sends to other lists, in this case @Naples, @Cayman and @ACK and leaving out @Managers. I keep getting authorization requests from each store list when I send to @Stores but if I send to each store list individually its fine. I've got them all set up to "accept non member postings for which no explicit action is defined", as well as set "accept_these_nonmembers" to ^.*

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  • lists:keyfind problems

    - by dagda1
    Hi, I cannot for the life of me get lists:keyfind to work as I expect in Erlang. I have the following eunit test: should_find_key_test() -> NewList = lists:keystore("key", 1, [], {"key", "value"}), Value = case lists:keyfind("key", 1, NewList) of false -> notfound; {_key, _value} -> _value end, ?debugVal(Value). Whenever I run this test I get the following error message: indextests:should_find_key_test (module 'indextests')...failed ::error:undef in function lists:keyfind/3 called as keyfind("key",1,[{"key","value"}]) in call from indextests:should_find_key_test/0 Can anyone see what I am doing wrong? Is it saying that lists:keyfind no longer exists? Cheers Paul

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  • C# 3.5 Merge 2 lists of 2 different types

    - by Ehsan
    I have 2 generic Lists List<type1> L1 , List<type2> L2 in C# 3.5 Problem: type1 has an attribute called "key1" and type2 has an attribute called "key2" How to merge L1 and L2 on key1 = key2. Both lists are unsorted but I'm welcome to any ideas on how to sort the lists based on the attribute. I'd like to be able to merge the two lists on a key. I know it's not a dictionary and it would've been nice if it was but there is a very specific reason why they are lists which I will not get in to because that is irrelevant.

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  • the size of apt-get update lists is too big

    - by dumb906
    I ran a clean install to Ubuntu 12.04 and so far everything has been working well. I especially commend the Ubuntu team for this release. I only noticed that the size of repository update is now about ~13MB. Normally, it is about this size for the first time you run apt-get update after a clean install and then ~ 23kb - 1300kb for subsequent updates. The output from apt-get update is the same I get for previous versions of Ubuntu (its pretty normal). Its a bit too long but look at an example output I got from running apt-get update. Ign http://archive.canonical.com precise InRelease Ign http://dl.google.com stable InRelease Ign http://dl.google.com stable InRelease Ign http://ppa.launchpad.net precise InRelease Ign http://ppa.launchpad.net precise InRelease Ign http://ppa.launchpad.net precise InRelease Hit http://download.virtualbox.org precise InRelease Ign http://security.ubuntu.com precise-security InRelease Ign http://linux.dropbox.com precise InRelease Ign http://extras.ubuntu.com precise InRelease Ign http://download.skype.com stable InRelease Hit http://archive.canonical.com precise Release.gpg Get:1 http://dl.google.com stable Release.gpg [198 B] Ign http://ppa.launchpad.net precise InRelease Ign http://ppa.launchpad.net precise InRelease Ign http://ppa.launchpad.net precise InRelease Ign http://ppa.launchpad.net precise InRelease Ign http://ppa.launchpad.net precise InRelease Ign http://ppa.launchpad.net precise InRelease Ign http://ppa.launchpad.net precise InRelease Ign http://ppa.launchpad.net precise InRelease Ign http://ppa.launchpad.net oneiric InRelease Ign http://ppa.launchpad.net precise InRelease Get:2 http://security.ubuntu.com precise-security Release.gpg [198 B] Get:3 http://extras.ubuntu.com precise Release.gpg [72 B] Hit http://download.virtualbox.org precise/contrib i386 Packages Ign http://download.skype.com stable Release.gpg Hit http://linux.dropbox.com precise Release.gpg Ign http://us.archive.ubuntu.com precise InRelease Ign http://us.archive.ubuntu.com precise-updates InRelease Ign http://us.archive.ubuntu.com precise-backports InRelease Hit http://archive.canonical.com precise Release Get:4 http://dl.google.com stable Release.gpg [198 B] Ign http://ppa.launchpad.net oneiric InRelease Ign http://ppa.launchpad.net oneiric InRelease Ign http://ppa.launchpad.net precise InRelease Ign http://ppa.launchpad.net precise InRelease Ign http://ppa.launchpad.net precise InRelease Hit http://ppa.launchpad.net precise Release.gpg Hit http://ppa.launchpad.net precise Release.gpg Get:5 http://security.ubuntu.com precise-security Release [49.6 kB] Hit http://extras.ubuntu.com precise Release Ign http://download.skype.com stable Release Ign http://download.virtualbox.org precise/contrib TranslationIndex Get:6 http://us.archive.ubuntu.com precise Release.gpg [198 B] Hit http://archive.canonical.com precise/partner i386 Packages Hit http://linux.dropbox.com precise Release Get:7 http://ppa.launchpad.net precise Release.gpg [316 B] Hit http://ppa.launchpad.net precise Release.gpg Hit http://ppa.launchpad.net precise Release.gpg Hit http://extras.ubuntu.com precise/main Sources Get:8 http://ppa.launchpad.net precise Release.gpg [316 B] Hit http://ppa.launchpad.net precise Release.gpg Hit http://ppa.launchpad.net precise Release.gpg Hit http://ppa.launchpad.net precise Release.gpg Hit http://ppa.launchpad.net precise Release.gpg Get:9 http://us.archive.ubuntu.com precise-updates Release.gpg [198 B] Ign http://archive.canonical.com precise/partner TranslationIndex Ign http://download.skype.com stable/non-free i386 Packages/DiffIndex Get:10 http://dl.google.com stable Release [1,347 B] Hit http://linux.dropbox.com precise/main i386 Packages Hit http://ppa.launchpad.net precise Release.gpg Hit http://ppa.launchpad.net oneiric Release.gpg Hit http://extras.ubuntu.com precise/main i386 Packages Ign http://extras.ubuntu.com precise/main TranslationIndex Hit http://ppa.launchpad.net precise Release.gpg Hit http://ppa.launchpad.net oneiric Release.gpg Hit http://ppa.launchpad.net oneiric Release.gpg Hit http://ppa.launchpad.net precise Release.gpg Hit http://ppa.launchpad.net precise Release.gpg Get:11 http://us.archive.ubuntu.com precise-backports Release.gpg [198 B] Ign http://download.skype.com stable/non-free TranslationIndex Get:12 http://dl.google.com stable Release [1,347 B] Hit http://ppa.launchpad.net precise Release.gpg Hit http://ppa.launchpad.net precise Release Hit http://ppa.launchpad.net precise Release Ign http://linux.dropbox.com precise/main TranslationIndex Hit http://ppa.launchpad.net precise Release Ign http://ppa.launchpad.net precise Release Hit http://ppa.launchpad.net precise Release Hit http://ppa.launchpad.net precise Release Get:13 http://ppa.launchpad.net precise Release [11.9 kB] Get:14 http://us.archive.ubuntu.com precise Release [49.6 kB] Hit http://download.skype.com stable/non-free i386 Packages Get:15 http://dl.google.com stable/main i386 Packages [1,268 B] Ign http://dl.google.com stable/main TranslationIndex Hit http://ppa.launchpad.net precise Release Hit http://ppa.launchpad.net precise Release Hit http://ppa.launchpad.net precise Release Hit http://ppa.launchpad.net precise Release Hit http://ppa.launchpad.net precise Release Hit http://ppa.launchpad.net oneiric Release Hit http://ppa.launchpad.net precise Release Hit http://ppa.launchpad.net oneiric Release Get:16 http://security.ubuntu.com precise-security/main Sources [7,089 B] Hit http://ppa.launchpad.net oneiric Release Get:17 http://dl.google.com stable/main i386 Packages [769 B] Ign http://dl.google.com stable/main TranslationIndex Hit http://ppa.launchpad.net precise Release Hit http://ppa.launchpad.net precise Release Hit http://ppa.launchpad.net precise Release Hit http://ppa.launchpad.net precise/main Sources Hit http://ppa.launchpad.net precise/main i386 Packages Get:18 http://security.ubuntu.com precise-security/restricted Sources [14 B] Get:19 http://security.ubuntu.com precise-security/universe Sources [3,653 B] Get:20 http://security.ubuntu.com precise-security/multiverse Sources [696 B] Get:21 http://security.ubuntu.com precise-security/main i386 Packages [32.9 kB] Ign http://ppa.launchpad.net precise/main TranslationIndex Hit http://ppa.launchpad.net precise/main Sources Hit http://ppa.launchpad.net precise/main i386 Packages Ign http://ppa.launchpad.net precise/main TranslationIndex Get:22 http://us.archive.ubuntu.com precise-updates Release [49.6 kB] Ign http://ppa.launchpad.net precise/main Sources/DiffIndex Ign http://ppa.launchpad.net precise/main i386 Packages/DiffIndex Ign http://ppa.launchpad.net precise/main TranslationIndex Hit http://ppa.launchpad.net precise/main Sources Hit http://ppa.launchpad.net precise/main i386 Packages Get:23 http://security.ubuntu.com precise-security/restricted i386 Packages [14 B] Get:24 http://security.ubuntu.com precise-security/universe i386 Packages [8,594 B] Get:25 http://security.ubuntu.com precise-security/multiverse i386 Packages [1,393 B] Hit http://security.ubuntu.com precise-security/main TranslationIndex Hit http://security.ubuntu.com precise-security/multiverse TranslationIndex Hit http://security.ubuntu.com precise-security/restricted TranslationIndex Hit http://security.ubuntu.com precise-security/universe TranslationIndex Ign http://ppa.launchpad.net precise/main TranslationIndex Get:26 http://us.archive.ubuntu.com precise-backports Release [49.6 kB] Hit http://ppa.launchpad.net precise/main Sources Hit http://ppa.launchpad.net precise/main i386 Packages Ign http://ppa.launchpad.net precise/main TranslationIndex Get:27 http://ppa.launchpad.net precise/main i386 Packages [1,276 B] Ign http://ppa.launchpad.net precise/main TranslationIndex Hit http://ppa.launchpad.net precise/main Sources Hit http://ppa.launchpad.net precise/main i386 Packages Ign http://ppa.launchpad.net precise/main TranslationIndex Hit http://ppa.launchpad.net precise/main Sources Get:28 http://us.archive.ubuntu.com precise/main Sources [934 kB] Hit http://ppa.launchpad.net precise/main i386 Packages Ign http://ppa.launchpad.net precise/main TranslationIndex Hit http://ppa.launchpad.net precise/main Sources Hit http://ppa.launchpad.net precise/main i386 Packages Ign http://ppa.launchpad.net precise/main TranslationIndex Hit http://ppa.launchpad.net precise/main i386 Packages Hit http://security.ubuntu.com precise-security/main Translation-en Hit http://security.ubuntu.com precise-security/multiverse Translation-en Hit http://security.ubuntu.com precise-security/restricted Translation-en Ign http://ppa.launchpad.net precise/main TranslationIndex Hit http://ppa.launchpad.net precise/main i386 Packages Ign http://ppa.launchpad.net precise/main TranslationIndex Hit http://ppa.launchpad.net oneiric/main Sources Hit http://ppa.launchpad.net oneiric/main i386 Packages Ign http://ppa.launchpad.net oneiric/main TranslationIndex Hit http://ppa.launchpad.net precise/main i386 Packages Ign http://ppa.launchpad.net precise/main TranslationIndex Hit http://ppa.launchpad.net oneiric/main Sources Hit http://security.ubuntu.com precise-security/universe Translation-en Ign http://archive.canonical.com precise/partner Translation-en_US Hit http://ppa.launchpad.net oneiric/main i386 Packages Ign http://ppa.launchpad.net oneiric/main TranslationIndex Hit http://ppa.launchpad.net oneiric/main Sources Hit http://ppa.launchpad.net oneiric/main i386 Packages Ign http://ppa.launchpad.net oneiric/main TranslationIndex Hit http://ppa.launchpad.net precise/main Sources Ign http://extras.ubuntu.com precise/main Translation-en_US Ign http://download.virtualbox.org precise/contrib Translation-en_US Ign http://archive.canonical.com precise/partner Translation-en Hit http://ppa.launchpad.net precise/main i386 Packages Ign http://ppa.launchpad.net precise/main TranslationIndex Hit http://ppa.launchpad.net precise/main Sources Hit http://ppa.launchpad.net precise/main i386 Packages Ign http://ppa.launchpad.net precise/main TranslationIndex Ign http://extras.ubuntu.com precise/main Translation-en Ign http://download.virtualbox.org precise/contrib Translation-en Hit http://ppa.launchpad.net precise/main Sources Hit http://ppa.launchpad.net precise/main i386 Packages Ign http://ppa.launchpad.net precise/main TranslationIndex Hit http://ppa.launchpad.net precise/main Sources Ign http://linux.dropbox.com precise/main Translation-en_US Hit http://ppa.launchpad.net precise/main i386 Packages Ign http://download.skype.com stable/non-free Translation-en_US Ign http://linux.dropbox.com precise/main Translation-en Ign http://download.skype.com stable/non-free Translation-en Ign http://dl.google.com stable/main Translation-en_US Ign http://dl.google.com stable/main Translation-en Ign http://dl.google.com stable/main Translation-en_US Get:29 http://us.archive.ubuntu.com precise/restricted Sources [5,470 B] Get:30 http://us.archive.ubuntu.com precise/universe Sources [5,019 kB] Ign http://dl.google.com stable/main Translation-en Get:31 http://us.archive.ubuntu.com precise/multiverse Sources [155 kB] Get:32 http://us.archive.ubuntu.com precise/main i386 Packages [1,274 kB] Get:33 http://us.archive.ubuntu.com precise/restricted i386 Packages [8,431 B] Get:34 http://us.archive.ubuntu.com precise/universe i386 Packages [4,796 kB] Ign http://ppa.launchpad.net precise/main Translation-en_US Ign http://ppa.launchpad.net precise/main Translation-en Ign http://ppa.launchpad.net precise/main Translation-en_US Ign http://ppa.launchpad.net precise/main Translation-en Ign http://ppa.launchpad.net precise/main Translation-en_US Ign http://ppa.launchpad.net precise/main Translation-en Ign http://ppa.launchpad.net precise/main Translation-en_US Ign http://ppa.launchpad.net precise/main Translation-en Ign http://ppa.launchpad.net precise/main Translation-en_US Ign http://ppa.launchpad.net precise/main Translation-en Ign http://ppa.launchpad.net precise/main Translation-en_US Ign http://ppa.launchpad.net precise/main Translation-en Ign http://ppa.launchpad.net precise/main Translation-en_US Ign http://ppa.launchpad.net precise/main Translation-en Ign http://ppa.launchpad.net precise/main Translation-en_US Ign http://ppa.launchpad.net precise/main Translation-en Ign http://ppa.launchpad.net precise/main Translation-en_US Ign http://ppa.launchpad.net precise/main Translation-en Ign http://ppa.launchpad.net precise/main Translation-en_US Ign http://ppa.launchpad.net precise/main Translation-en Ign http://ppa.launchpad.net precise/main Translation-en_US Ign http://ppa.launchpad.net precise/main Translation-en Ign http://ppa.launchpad.net oneiric/main Translation-en_US Ign http://ppa.launchpad.net oneiric/main Translation-en Ign http://ppa.launchpad.net precise/main Translation-en_US Ign http://ppa.launchpad.net precise/main Translation-en Ign http://ppa.launchpad.net oneiric/main Translation-en_US Ign http://ppa.launchpad.net oneiric/main Translation-en Ign http://ppa.launchpad.net oneiric/main Translation-en_US Ign http://ppa.launchpad.net oneiric/main Translation-en Ign http://ppa.launchpad.net precise/main Translation-en_US Ign http://ppa.launchpad.net precise/main Translation-en Ign http://ppa.launchpad.net precise/main Translation-en_US Ign http://ppa.launchpad.net precise/main Translation-en Ign http://ppa.launchpad.net precise/main Translation-en_US Ign http://ppa.launchpad.net precise/main Translation-en Get:35 http://us.archive.ubuntu.com precise/multiverse i386 Packages [121 kB] Hit http://us.archive.ubuntu.com precise/main TranslationIndex Hit http://us.archive.ubuntu.com precise/multiverse TranslationIndex Hit http://us.archive.ubuntu.com precise/restricted TranslationIndex Hit http://us.archive.ubuntu.com precise/universe TranslationIndex Get:36 http://us.archive.ubuntu.com precise-updates/main Sources [31.2 kB] Get:37 http://us.archive.ubuntu.com precise-updates/restricted Sources [765 B] Get:38 http://us.archive.ubuntu.com precise-updates/universe Sources [10.1 kB] Get:39 http://us.archive.ubuntu.com precise-updates/multiverse Sources [696 B] Get:40 http://us.archive.ubuntu.com precise-updates/main i386 Packages [96.5 kB] Get:41 http://us.archive.ubuntu.com precise-updates/restricted i386 Packages [770 B] Get:42 http://us.archive.ubuntu.com precise-updates/universe i386 Packages [27.7 kB] Get:43 http://us.archive.ubuntu.com precise-updates/multiverse i386 Packages [1,393 B] Hit http://us.archive.ubuntu.com precise-updates/main TranslationIndex Hit http://us.archive.ubuntu.com precise-updates/multiverse TranslationIndex Hit http://us.archive.ubuntu.com precise-updates/restricted TranslationIndex Hit http://us.archive.ubuntu.com precise-updates/universe TranslationIndex Get:44 http://us.archive.ubuntu.com precise-backports/main Sources [700 B] Get:45 http://us.archive.ubuntu.com precise-backports/restricted Sources [14 B] Get:46 http://us.archive.ubuntu.com precise-backports/universe Sources [1,680 B] Get:47 http://us.archive.ubuntu.com precise-backports/multiverse Sources [14 B] Get:48 http://us.archive.ubuntu.com precise-backports/main i386 Packages [559 B] Get:49 http://us.archive.ubuntu.com precise-backports/restricted i386 Packages [14 B] Get:50 http://us.archive.ubuntu.com precise-backports/universe i386 Packages [1,391 B] Get:51 http://us.archive.ubuntu.com precise-backports/multiverse i386 Packages [14 B] Hit http://us.archive.ubuntu.com precise-backports/main TranslationIndex Hit http://us.archive.ubuntu.com precise-backports/multiverse TranslationIndex Hit http://us.archive.ubuntu.com precise-backports/restricted TranslationIndex Hit http://us.archive.ubuntu.com precise-backports/universe TranslationIndex Hit http://us.archive.ubuntu.com precise/main Translation-en Hit http://us.archive.ubuntu.com precise/multiverse Translation-en Hit http://us.archive.ubuntu.com precise/restricted Translation-en Hit http://us.archive.ubuntu.com precise/universe Translation-en Hit http://us.archive.ubuntu.com precise-updates/main Translation-en Hit http://us.archive.ubuntu.com precise-updates/multiverse Translation-en Hit http://us.archive.ubuntu.com precise-updates/restricted Translation-en Hit http://us.archive.ubuntu.com precise-updates/universe Translation-en Hit http://us.archive.ubuntu.com precise-backports/main Translation-en Hit http://us.archive.ubuntu.com precise-backports/multiverse Translation-en Hit http://us.archive.ubuntu.com precise-backports/restricted Translation-en Hit http://us.archive.ubuntu.com precise-backports/universe Translation-en Fetched 12.8 MB in 1min 33s (137 kB/s) Is this a new feature in 12.04? Or, if it is unintended, is there a way I can fix this? Thanks.

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  • ASP.NET – Function to Fill Month, Date and Year into Dropdown lists

    - by SAMIR BHOGAYTA
    public void fillMonthList(DropDownList ddlList) { ddlList.Items.Add(new ListItem("Month", "Month")); ddlList.SelectedIndex = 0; DateTime month = Convert.ToDateTime("1/1/2000"); for (int intLoop = 0; intLoop { DateTime NextMont = month.AddMonths(intLoop); //ddlList.Items.Add(new ListItem(NextMont.ToString("MMMM"), NextMont.Month.ToString())); ddlList.Items.Add(new ListItem(NextMont.ToString("MMMM"), NextMont.ToString("MMMM"))); } } public void fillDayList(DropDownList ddlList) { ddlList.Items.Add(new ListItem("Day", "Day")); ddlList.SelectedIndex = 0; int totalDays = DateTime.DaysInMonth(DateTime.Now.Year, DateTime.Now.Month); for (int intLoop = 1; intLoop { ddlList.Items.Add(new ListItem(intLoop.ToString(), intLoop.ToString())); } } public void fillYearList(DropDownList ddlList) { ddlList.Items.Add(new ListItem("Year", "Year")); ddlList.SelectedIndex = 0; int intYearName = 1900; for (int intLoop = intYearName; intLoop { ddlList.Items.Add(new ListItem(intLoop.ToString(), intLoop.ToString())); } }

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  • openGL migration from SFML to glut, vertices arrays or display lists are not displayed

    - by user3714670
    Due to using quad buffered stereo 3D (which i have not included yet), i need to migrate my openGL program from a SFML window to a glut window. With SFML my vertices and display list were properly displayed, now with glut my window is blank white (or another color depending on the way i clear it). Here is the code to initialise the window : int type; int stereoMode = 0; if ( stereoMode == 0 ) type = GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH; else type = GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH | GLUT_STEREO; glutInitDisplayMode(type); int argc = 0; char *argv = ""; glewExperimental = GL_TRUE; glutInit(&argc, &argv); bool fullscreen = false; glutInitWindowSize(width,height); int win = glutCreateWindow(title.c_str()); glutSetWindow(win); assert(win != 0); if ( fullscreen ) { glutFullScreen(); width = glutGet(GLUT_SCREEN_WIDTH); height = glutGet(GLUT_SCREEN_HEIGHT); } GLenum err = glewInit(); if (GLEW_OK != err) { fprintf(stderr, "Error: %s\n", glewGetErrorString(err)); } glutDisplayFunc(loop_function); This is the only code i had to change for now, but here is the code i used with sfml and displayed my objects in the loop, if i change the value of glClearColor, the window's background does change color : glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glClearColor(255.0f, 255.0f, 255.0f, 0.0f); glLoadIdentity(); sf::Time elapsed_time = clock.getElapsedTime(); clock.restart(); camera->animate(elapsed_time.asMilliseconds()); camera->look(); for (auto i = objects->cbegin(); i != objects->cend(); ++i) (*i)->draw(camera); glutSwapBuffers(); Is there any other changes i should have done switching to glut ? that would be great if someone could enlighten me on the subject. In addition to that, i found out that adding too many objects (that were well handled before with SFML), openGL gives error 1285: out of memory. Maybe this is related. EDIT : Here is the code i use to draw each object, maybe it is the problem : GLuint LightID = glGetUniformLocation(this->shaderProgram, "LightPosition_worldspace"); if(LightID ==-1) cout << "LightID not found ..." << endl; GLuint MaterialAmbientID = glGetUniformLocation(this->shaderProgram, "MaterialAmbient"); if(LightID ==-1) cout << "LightID not found ..." << endl; GLuint MaterialSpecularID = glGetUniformLocation(this->shaderProgram, "MaterialSpecular"); if(LightID ==-1) cout << "LightID not found ..." << endl; glm::vec3 lightPos = glm::vec3(0,150,150); glUniform3f(LightID, lightPos.x, lightPos.y, lightPos.z); glUniform3f(MaterialAmbientID, MaterialAmbient.x, MaterialAmbient.y, MaterialAmbient.z); glUniform3f(MaterialSpecularID, MaterialSpecular.x, MaterialSpecular.y, MaterialSpecular.z); // Get a handle for our "myTextureSampler" uniform GLuint TextureID = glGetUniformLocation(shaderProgram, "myTextureSampler"); if(!TextureID) cout << "TextureID not found ..." << endl; glActiveTexture(GL_TEXTURE0); sf::Texture::bind(texture); glUniform1i(TextureID, 0); // 2nd attribute buffer : UVs GLuint vertexUVID = glGetAttribLocation(shaderProgram, "color"); if(vertexUVID==-1) cout << "vertexUVID not found ..." << endl; glEnableVertexAttribArray(vertexUVID); glBindBuffer(GL_ARRAY_BUFFER, color_array_buffer); glVertexAttribPointer(vertexUVID, 2, GL_FLOAT, GL_FALSE, 0, 0); GLuint vertexNormal_modelspaceID = glGetAttribLocation(shaderProgram, "normal"); if(!vertexNormal_modelspaceID) cout << "vertexNormal_modelspaceID not found ..." << endl; glEnableVertexAttribArray(vertexNormal_modelspaceID); glBindBuffer(GL_ARRAY_BUFFER, normal_array_buffer); glVertexAttribPointer(vertexNormal_modelspaceID, 3, GL_FLOAT, GL_FALSE, 0, 0 ); GLint posAttrib; posAttrib = glGetAttribLocation(shaderProgram, "position"); if(!posAttrib) cout << "posAttrib not found ..." << endl; glEnableVertexAttribArray(posAttrib); glBindBuffer(GL_ARRAY_BUFFER, position_array_buffer); glVertexAttribPointer(posAttrib, 3, GL_FLOAT, GL_FALSE, 0, 0); glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, elements_array_buffer); glDrawElements(GL_TRIANGLES, indices.size(), GL_UNSIGNED_INT, 0); GLuint error; while ((error = glGetError()) != GL_NO_ERROR) { cerr << "OpenGL error: " << error << endl; } disableShaders();

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  • Technology/Programming mailing lists How do you manage?

    - by AdityaGameProgrammer
    Email Alerts, Blog /Forum updates, discussion subscriptions general programming/technology update emails that we often subscribe to.Do you actually read them ? or go direct to the source when you find time. Often we might the mail of programmers filled with loads of unread subscription mail from technology they previously were following or worked on or things they wish to follow .Some or a majority of these mail just keep on piling up . I personally have few updates that i wish i read but constantly avoid and keep of for latter and finally delete them in effort keep the in box clean. Few questions come to mind regarding this Do you keep such mail in separate accounts? Do you read all the mail you have subscribed to? Do you ever unsubscribe to any such email if you aren't reading them? How much do you really value these email. Lastly do you keep your in box clean ? wish to deal with this in a better way.

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  • Telerik Silverlight Grid with BCS Lists in SharePoint 2010

    - by Sahil Malik
    Ad:: SharePoint 2007 Training in .NET 3.5 technologies (more information). Okay my next video is online. In this video, I demonstrate the usage of the Telerik Silverlight grid working with a Business Connectivity Services (BCS) list over the Client Object Model. I use the Telerik grid to create a view on a BCS list, and demonstrate the rich value that a nice Silverlight grid can bring into SharePoint 2010. The entire presentation is mostly all code. It’s about 1/2 hr in length. Watch the video Comment on the article ....

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  • Switching my collision detection to array lists caused it to stop working

    - by Charlton Santana
    I have made a collision detection system which worked when I did not use array list and block generation. It is weird why it's not working but here's the code, and if anyone could help I would be very grateful :) The first code if the block generation. private static final List<Block> BLOCKS = new ArrayList<Block>(); Random rnd = new Random(System.currentTimeMillis()); int randomx = 400; int randomy = 400; int blocknum = 100; String Title = "blocktitle" + blocknum; private Block block; public void generateBlocks(){ if(blocknum > 0){ int offset = rnd.nextInt(250) + 100; //500 is the maximum offset, this is a constant randomx += offset;//ofset will be between 100 and 400 int randomyoff = rnd.nextInt(80); //500 is the maximum offset, this is a constant randomy = platformheighttwo - 6 - randomyoff;//ofset will be between 100 and 400 block = new Block(BitmapFactory.decodeResource(getResources(), R.drawable.block2), randomx, randomy); BLOCKS.add(block); blocknum -= 1; } The second is where the collision detection takes place note: the block.draw(canvas); works perfectly. It's the blocks that don't work. for(Block block : BLOCKS) { block.draw(canvas); if (sprite.bottomrx < block.bottomrx && sprite.bottomrx > block.bottomlx && sprite.bottomry < block.bottommy && sprite.bottomry > block.topry ){ Log.d(TAG, "Collided!!!!!!!!!!!!1"); } // bottom left touching block? if (sprite.bottomlx < block.bottomrx && sprite.bottomlx > block.bottomlx && sprite.bottomly < block.bottommy && sprite.bottomly > block.topry ){ Log.d(TAG, "Collided!!!!!!!!!!!!1"); } // top right touching block? if (sprite.toprx < block.bottomrx && sprite.toprx > block.bottomlx && sprite.topry < block.bottommy && sprite.topry > block.topry ){ Log.d(TAG, "Collided!!!!!!!!!!!!1"); } //top left touching block? if (sprite.toprx < block.bottomrx && sprite.toprx > block.bottomlx && sprite.topry < block.bottommy && sprite.topry > block.topry ){ Log.d(TAG, "Collided!!!!!!!!!!!!1"); } } The values eg bottomrx are in the block.java file..

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  • DBA Best Practices - A Blog Series: Episode 2 - Password Lists

    - by Argenis
      Digital World, Digital Locks One of the biggest digital assets that any company has is its secrets. These include passwords, key rings, certificates, and any other digital asset used to protect another asset from tampering or unauthorized access. As a DBA, you are very likely to manage some of these assets for your company - and your employer trusts you with keeping them safe. Probably one of the most important of these assets are passwords. As you well know, the can be used anywhere: for service accounts, credentials, proxies, linked servers, DTS/SSIS packages, symmetrical keys, private keys, etc., etc. Have you given some thought to what you're doing to keep these passwords safe? Are you backing them up somewhere? Who else besides you can access them? Good-Ol’ Post-It Notes Under Your Keyboard If you have a password-protected Excel sheet for your passwords, I have bad news for you: Excel's level of encryption is good for your grandma's budget spreadsheet, not for a list of enterprise passwords. I will try to summarize the main point of this best practice in one sentence: You should keep your passwords on an encrypted, access and version-controlled, backed-up, well-known shared location that every DBA on your team is aware of, and maintain copies of this password "database" on your DBA's workstations. Now I have to break down that statement to you: - Encrypted: what’s the point of saving your passwords on a file that any Windows admin with enough privileges can read? - Access controlled: This one is pretty much self-explanatory. - Version controlled: Passwords change (and I’m really hoping you do change them) and version control would allow you to track what a previous password was if the utility you’ve chosen doesn’t handle that for you. - Backed-up: You want a safe copy of the password list to be kept offline, preferably in long term storage, with relative ease of restoring. - Well-known shared location: This is critical for teams: what good is a password list if only one person in the team knows where it is? I have seen multiple examples of this that work well. They all start with an encrypted database. Certainly you could leverage SQL Server's native encryption solutions like cell encryption for this. I have found such implementations to be impractical, for the most part. Enter The World Of Utilities There are a myriad of open source/free software solutions to help you here. One of my favorites is KeePass, which creates encrypted files that can be saved to a network share, Sharepoint, etc. KeePass has UIs for most operating systems, including Windows, MacOS, iOS, Android and Windows Phone. Other solutions I've used before worth mentioning include PasswordSafe and 1Password, with the latter one being a paid solution – but wildly popular in mobile devices. There are, of course, even more "enterprise-level" solutions available from 3rd party vendors. The truth is that most of the customers that I work with don't need that level of protection of their digital assets, and something like a KeePass database on Sharepoint suits them very well. What are you doing to safeguard your passwords? Leave a comment below, and join the discussion! Cheers, -Argenis

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  • Collisions and Lists

    - by user50635
    I've run into an issue that breaks my collisions. Here's my method: Gather Input Project Rectangle Check for intersection and ispassable Update The update method is built on object_position * seconds_passed * velocity * speed. Input changes velocity and is normalized if 1. This method works well with just one object comparison, however I pass a list or a for loop to the collision detector and velocity gets changed back to a non zero when the list hits an object that passes the test and the object can pass through. Any solutions would be much appreciated. Side note is there a more proper way to simulate movement?

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  • Outlook 2007: Filter messages differently based on mailing lists

    - by Naseer
    I am part of two mailing lists, one of which is of high importance to me and should always show up in my Inbox and the other is not so important and should go to a specific folder. Sometimes both these mailing lists are in the To/CC list. In this case, I want the message to stay in my Inbox and not get moved. Is this possible with Rules and Alerts ? If not, is there a macro ?

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  • I need to order a list that is dependant on another list. how to change both lists?

    - by Ben Fossen
    I have a Matlab program that generates a list x = 6.1692 8.1863 5.8092 8.2754 6.0891 the program also outputs another list aspl = 680 637 669 599 693. The two lists are on equal length and the first element in list x is related to the first element in list aspl. I need to graph the two lists but want list aspl to be in order from smallest to largest. How would I go about doing this? If I need to move the first element in aspl to position 4 in the list, then the first element of list x also needs to be moved to position 4 in list x. The numbers above are not important they are just examples, the actual program generates hundereds of numbers. for example x = 6.1692 8.1863 5.8092 8.2754 initially aspl = 680 637 669 599 693 after changing aspl to ascending order this is how x should look. x = 5.8092 8.1863 5.8092 6.1692 8.2754 aspl = 599 637 669 680 693

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  • Databound Checkbox list with textboxes in a webform

    - by zSysop
    Hi all, I'm having trouble coming up with a solution for the following problem and i was wondering if someone here would help me out. I need to pull a list of supplies from a db table and list them along with two textboxes (one for quantity, and another for manufacturer) so the list would look something like this. checkbox for supply 1 | Quantity | Manufacturer checkbox for supply 2 | Quantity | Manufacturer .. I also need to store all of the checked items in a db table. I'm not sure how i should go about doing this. I've heard some talk about a repeater control being useful but i've not come across any examples that do this type of thing. Thanks in advance

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  • How to build a GridView like DataBound Templated Custom ASP.NET Server Control

    - by Deyan
    I am trying to develop a very simple templated custom server control that resembles GridView. Basically, I want the control to be added in the .aspx page like this: <cc:SimpleGrid ID="SimpleGrid1" runat="server"> <TemplatedColumn>ID: <%# Eval("ID") %></ TemplatedColumn> <TemplatedColumn>Name: <%# Eval("Name") %></ TemplatedColumn> <TemplatedColumn>Age: <%# Eval("Age") %></ TemplatedColumn> </cc:SimpleGrid> and when providing the following datasource: DataTable table = new DataTable(); table.Columns.Add("ID", typeof(int)); table.Columns.Add("Name", typeof(string)); table.Columns.Add("Age", typeof(int)); table.Rows.Add(1, "Bob", 35); table.Rows.Add(2, "Sam", 44); table.Rows.Add(3, "Ann", 26); SimpleGrid1.DataSource = table; SimpleGrid1.DataBind(); the result should be a HTML table like this one. ------------------------------- | ID: 1 | Name: Bob | Age: 35 | ------------------------------- | ID: 2 | Name: Sam | Age: 44 | ------------------------------- | ID: 3 | Name: Ann | Age: 26 | ------------------------------- The main problem is that I cannot define the TemplatedColumn. When I tried to do it like this ... private ITemplate _TemplatedColumn; [PersistenceMode(PersistenceMode.InnerProperty)] [TemplateContainer(typeof(TemplatedColumnItem))] [TemplateInstance(TemplateInstance.Multiple)] public ITemplate TemplatedColumn { get { return _TemplatedColumn; } set { _TemplatedColumn = value; } } .. and subsequently instantiate the template in the CreateChildControls I got the following result which is not what I want: ----------- | Age: 35 | ----------- | Age: 44 | ----------- | Age: 26 | ----------- I know that what I want to achieve is pointless and that I can use DataGrid to achieve it, but I am giving this very simple example because if I know how to do this I would be able to develop the control that I need. Thank you.

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  • Trouble with this Python newbie exercise. Using Lists and finding if two adjacent elements are the s

    - by Sergio Tapia
    Here's what I got: # D. Given a list of numbers, return a list where # all adjacent == elements have been reduced to a single element, # so [1, 2, 2, 3] returns [1, 2, 3]. You may create a new list or # modify the passed in list. def remove_adjacent(nums): for number in nums: numberHolder = number # +++your code here+++ return I'm kind of stuck here. What can I do?

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  • dotNet Templated, Repeating, Databound ServerControl: Modifying underlying ServerControl data per te

    - by Campbeln
    I have a server control that wraps an underlying class which manages a number of indexes to track where it is in a dataset (ie: RenderedRecordCount, ErroredRecordCount, NewRecordCount, etc.). I've got the server control rendering great, but OnDataBinding I'm having an issue as to seems to happen after CreateChildControls and before Render (both of which properly manage the iteration of the underlying indexes). While I'm somewhat familiar with the ASP.NET page lifecycle, this one seems to be beyond me at the moment. So... How do I hook into the iterative process OnDataBinding uses so I can manage the underlying indexes? Will I have to iterate over the ITemplates myself, managing the indexes as I go or is there an easier solution? [edit: Agh... writing the problem out is very cathartic... I'm thinking this is exactly what I will need to do...] Also... I implemented the iteration of the underlying indexes during CreateChildControls originally in the belief that was the proper place to hook in for events like OnDataBinding (thinking it was done as the controls were being .Add'd). Now it seems that this may actually be unnecessary. So I guess the secondary question is: What happens during CreateChildControls? Are the unadulterated (read: with various <%-tags in place) controls added to the .Controls collection without any other processing?

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  • CompositeDataBoundControl - databound values overwritten before event is fired due to DummyDataSourc

    - by Vidar Langberget
    I have a custom servercontrol that inherits from CompositeDataBoundControl. I have three templates: one header template, one footer template and one item template. The item template can contain a checkbox that I use to decide if I should delete the item. In the footer and/or header templates I have a button with a CommandName of "DeleteItem". When that button is clicked, I handle the event in OnBubbleEvent: if (cea.CommandName == "DeleteItem") { //loop through the item list and get the selected rows List<int> itemsToDelete = new List<int>(); foreach(Control c in this.Controls){ if (c is ItemData) { ItemData oid = (ItemData)c; CheckBox chkSel = (CheckBox)oid.FindControl("chkSelected"); if (chkSel.Checked) { itemsToDelete.Add(oid.Item.Id); } } } foreach (int id in itemsToDelete) { DeleteItem(id); } } } The problem is that Item is null since the CreateChildControls method already has been run as asp.net needs to recreate the control hierarchy before the event fire. It uses the DummyDataSource and a list of null objects to recreate the control hierarchy: IEnumerator e = dataSource.GetEnumerator(); if (e != null) { while (e.MoveNext()) { ItemData container = new ItemData (e.Current as OrderItem); ITemplate itemTemplate = this.ItemTemplate; if (itemTemplate == null) { itemTemplate = new DefaultItemTemplate(); } itemTemplate.InstantiateIn(container); Controls.Add(container); if (dataBinding) { container.DataBind(); } counter++; } } The problem is this line: ItemData container = new ItemData (e.Current as OrderItem); When the control hierarchy is rebuilt before the event is fired, the e.Current is null, so when I try to find out which item was marked for deletion, I get 0 since the original value has been overwritten. Any suggestions on how to fix this?

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  • DataGrid calculate difference between values in two databound cells

    - by justMe
    Hello! In my small application I have a DataGrid (see screenshot) that's bound to a list of Measurement objects. A Measurement is just a data container with two properties: Date and CounterGas (float). Each Measurement object represents my gas consumption at a specific date. The list of measurements is bound to the DataGrid as follows: <DataGrid ItemsSource="{Binding Path=Measurements}" AutoGenerateColumns="False"> <DataGrid.Columns> <DataGridTextColumn Header="Date" Binding="{Binding Path=Date, StringFormat={}{0:dd.MM.yyyy}}" /> <DataGridTextColumn Header="Counter Gas" Binding="{Binding Path=ValueGas, StringFormat={}{0:F3}}" /> </DataGrid.Columns> </DataGrid> Well, and now my question :) I'd like to have another column right next to the column "Counter Gas" which shows the difference between the actual counter value and the last counter value. E.g. this additional column should calculate the difference between the value of of Feb. 13th and Feb. 6th = 199.789 - 187.115 = 15.674 What is the best way to achieve this? I'd like to avoid any calculation in the Measurement class which should just hold the data. I'd rather more like the DataGrid to handle the calculation. So is there a way to add another column that just calculates the difference between to values? Maybe using some kind of converter and extreme binding? ;D P.S.: Maybe someone with a better reputation could embed the screenshot. Thanks :)

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