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  • array with sessions, only prints one letter

    - by jolabero
    On login: $result = mysql_query("SELECT `id`, `username`, `email` FROM `users` WHERE `username` = '$username' AND `password` = '$passwd'"); $userdata = array('id','username','email'); $_SESSION['user'] = mysql_result($result, 0, $userdata); And when i want to print the users username echo $_SESSION['user']['username'] it only prints the first letter :/ whats wrong`?

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  • How initialize array of classes? (C++)

    - by Kra
    Hello, I have this class constructor: Pairs (int Pos, char *Pre, char *Post, bool Attach = true); How can I initialize array of Pairs classes? I tried: Pairs Holder[3] = { {Input.find("as"), "Pre", "Post"}, {Input.find("as"), "Pre", "Post"}, {Input.find("as"), "Pre", "Post"} }; Apparently it's not working, I also tried to use () brackets instead of {} but compiler keeps moaning all the time. Sorry if it is lame question, I googled quite hard but wasn't able to find answer :/ Thanks.

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  • How to get an array size

    - by John Doe
    I'd like to know how to get an array rows & columns size. For instance it would be something like this: int matrix[][] = { { 2, 3 , 4}, { 1, 5, 3 } } The size of this one would be 2 x 3. How can I calculate this without including other libraries but stdio or stdlib?

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  • How do I detect an array

    - by Dan
    OK so, is there an efficient way to detect on what array you're currently on by using the KeyListener? My code: http://www.javadan.pastebin.com/X68VyuGL What I am trying to do here is see if the current tile I am on is BLOCKED. Thanks.

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  • C++ static array leading to memory leak?

    - by MDonovin
    Lets say I have something like... void foo() { char c[100]; printf("this function does nothing useful"); } When foo is called, it creates the array on the stack, and when it goes out of scope, is the memory deallocated automatically? Or is c destroyed, but the memory remains allocated, with no way to access it/get it back except restarting the computer?

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  • remove repeated vaules _stack&array

    - by Fatimah
    I want to write a program to implement an array-based stack, which accept integer numbers entered by the user.the program will then identify any occurrences of a given value from user and remove the repeated values from the stack,(using Java programming language). I just need your help of writing (removing values method) e.g. input:6 2 3 4 3 8 output:6 2 4 8

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  • Can't store array in json field in postgresql (rails) can't cast Array to json

    - by Drew H
    This is the error I'm getting when I run db:migrate rake aborted! can't cast Array to json This is my table class CreateTrips < ActiveRecord::Migration def change create_table :trips do |t| t.json :flights t.timestamps end end end This is in my seeds.rb file flights = [{ depart_time_hour: 600, arrive_time_hour: 700, passengers: [ { user_id: 1, request: true } ] }] trip = Trip.create( { name: 'Flight', flights: flights.to_json } ) For some reason I can't do this. If I do this. trip = Trip.create( { name: 'Flight', flights: { flights: flights.to_json } } ) It works. I don't want this though because now I have to access the json array with trip.flights.flights. Not the behavior I'm wanting.

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  • Using a PreparedStatement to persist an array of Java Enums to an array of Postgres Enums

    - by McGin
    I have a Java Enum: public enum Equipment { Hood, Blinkers, ToungTie, CheekPieces, Visor, EyeShield, None;} and a corresponding Postgres enum: CREATE TYPE equipment AS ENUM ('Hood', 'Blinkers', 'ToungTie', 'CheekPieces', 'Visor', 'EyeShield', 'None'); Within my database I have a table which has a column containing an array of "equipment" items: CREATE TABLE "Entry" ( id bigint NOT NULL DEFAULT nextval('seq'::regclass), "date" character(10) NOT NULL, equipment equipment[] ); And finally when I am running my application I have an array of the "Equipment" enums which I want to persist to the database using a Prepared Statement, and for the life of me I can't figure out how to do it. StringBuffer sb = new StringBuffer("insert into \"Entry\" "); sb.append("( \"date\", \"equipment \" )"); sb.append(" values ( ?, ? )"); PreparedStatement ps = db.prepareStatement(sb.toString()); ps.setString("2010-10-10"); ps.set???????????

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  • C++ a class with an array of structs, without knowing how large an array I need

    - by Dominic Bou-Samra
    New to C++, and for that matter OO programming. I have a class with fields like firstname, age, school etc. I need to be able to store other information like for instance, where they have travelled, and what year it was in. I cannot declare another class specifically to hold travelDestination and what year, so I think a struct might be best. This is just an example: struct travel { string travelDest; string year; }; The issue is people are likely to have travelled different amounts. I was thinking of just having an array of travel structs to hold the data. But how do I create a fixed sized array to hold them, without knowing how big I need it to be? Perhaps I am going about this the completely wrong way, so any suggestions as to a better way would be appreciated.

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  • PHP search multidimensional array for value, then place that element at start of array

    - by BobFlemming
    I need to search this array: cars - [0] -make : Ford -model: Escort -year: 1991 [1] -make: Honda -model: Civic -year: 1996 [2] -make: Vauxhall -model: Astra -year: 1972 And if (for example) the model is "Civic" , place that 'car' at position 0. So the end array would be like: cars - [0] -make: Honda -model: Civic -year: 1996 [1] -make : Ford -model: Escort -year: 1991 [2] -make: Vauxhall -model: Astra -year: 1972 I've tried some usort variations: function typeSort($a, $b) { if ($a['model'] == 'Civic' ) { return 0; } return ($a['model'] < $b['model']) ? -1 : 1; } but this is just returning 1

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  • Split a sting array into a number array in javascript

    - by Wesley Skeen
    I am reading a value from a dropdown list depending on what option is selected. I am using jqPlot to graph the values. jqPlot expects an array of values like [91, 6, 2, 57, 29, 40, 95] but when I read the value in from the dropdown box it is coming in as a whole string "[91, 6, 2, 57, 29, 40, 95]" I tried splitting it but I got ["91", "6", "2", "57", "29", "40", "95"] which wont display the graph correctly. Is there anybody that has encountered something like this before and what can I do to make my values convert into a number array. Thanks for any help

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  • Array or array element in C?

    - by user3646717
    I'm reading a book about C programming, and I'm not sure whether there is an error in the book or not. Its about arrays and has the following array example: Then it says: The following statements sets all the elements in row 2 of array to zero: for( column = 0; column <= 3; column++) a[ 2 ][ column ] = 0; The preceding for statement is equivalent to the assignment statements: a[ 2 ][ 0 ] = 0; a[ 2 ][ 1 ] = 0; a[ 2 ][ 2 ] = 0; a[ 2 ][ 3 ] = 0; Shouldn't it say "The following statements sets all the elements in row 1 to zero"?. Because if I say a[ 3 ] I am talking about the row 2, if I say a[ 2 ] I am talking about row 1 and if I say a[ 1 ] I am talking about row 0.

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  • Output a php multi-dimensional array to a html table

    - by Fireflight
    I have been banging my head against the wall with this one for nearly a week now, and am no closer than I was the first day. I have a form that has 8 columns and a variable number of rows which I need to email to the client in a nicely formatted email. The form submits the needed fields as a multidimensional array. Rough example is below: <input name="order[0][topdiameter]" type="text" id="topdiameter0" value="1" size="5" /> <input name="order[0][bottomdiameter]" type="text" id="bottomdiameter0" value="1" size="5" /> <input name="order[0][slantheight]" type="text" id="slantheight0" value="1" size="5" /> <select name="order[0][fittertype]" id="fittertype0"> <option value="harp">Harp</option> <option value="euro">Euro</option> <option value="bulbclip">Regular</option> </select> <input name="order[0][washerdrop]" type="text" id="washerdrop0" value="1" size="5" /> <select name="order[0][fabrictype]" id="fabrictype"> <option value="linen">Linen</option> <option value="pleated">Pleated</option> </select> <select name="order[0][colours]" id="colours0"> <option value="beige">Beige</option> <option value="white">White</option> <option value="eggshell">Eggshell</option> <option value="parchment">Parchment</option> </select> <input name="order[0][quantity]" type="text" id="quantity0" value="1" size="5" /> This form is formatted in a table, and rows can be added to it dynamically. What I've been unable to do is get a properly formatted table out of the array. This is what I'm using now (grabbed from the net). <?php if (isset($_POST["submit"])) { $arr= $_POST['order'] echo '<table>'; foreach($arr as $arrs) { echo '<tr>'; foreach($arrs as $item) { echo "<td>$item</td>"; } echo '</tr>'; } echo '</table>; }; ?> This works perfectly for a single row of data. If I try submitting 2 or more rows from the form then one of the columns disappears. I'd like the table to be formatted as: | top | Bottom | Slant | Fitter | Washer | Fabric | Colours | Quantity | ------------------------------------------------------------------------ |value| value | value | value | value | value | value | value | with additional rows as needed. But, I can't find any examples that will generate that type of table! It seems like this should be something fairly straightforward, but I just can't locate an example that works the way I need it too.

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  • Drawing using Dynamic Array and Buffer Object

    - by user1905910
    I have a problem when creating the vertex array and the indices array. I don't know what really is the problem with the code, but I guess is something with the type of the arrays, can someone please give me a light on this? #define GL_GLEXT_PROTOTYPES #include<GL/glut.h> #include<iostream> using namespace std; #define BUFFER_OFFSET(offset) ((GLfloat*) NULL + offset) const GLuint numDiv = 2; const GLuint numVerts = 9; GLuint VAO; void display(void) { enum vertex {VERTICES, INDICES, NUM_BUFFERS}; GLuint * buffers = new GLuint[NUM_BUFFERS]; GLfloat (*squareVerts)[2] = new GLfloat[numVerts][2]; GLubyte * indices = new GLubyte[numDiv*numDiv*4]; GLuint delta = 80/numDiv; for(GLuint i = 0; i < numVerts; i++) { squareVerts[i][1] = (i/(numDiv+1))*delta; squareVerts[i][0] = (i%(numDiv+1))*delta; } for(GLuint i=0; i < numDiv; i++){ for(GLuint j=0; j < numDiv; j++){ //cada iteracao gera 4 pontos #define NUM_VERT(ii,jj) ((ii)*(numDiv+1)+(jj)) #define INDICE(ii,jj) (4*((ii)*numDiv+(jj))) indices[INDICE(i,j)] = NUM_VERT(i,j); indices[INDICE(i,j)+1] = NUM_VERT(i,j+1); indices[INDICE(i,j)+2] = NUM_VERT(i+1,j+1); indices[INDICE(i,j)+3] = NUM_VERT(i+1,j); } } glGenVertexArrays(1, &VAO); glBindVertexArray(VAO); glGenBuffers(NUM_BUFFERS, buffers); glBindBuffer(GL_ARRAY_BUFFER, buffers[VERTICES]); glBufferData(GL_ARRAY_BUFFER, sizeof(squareVerts), squareVerts, GL_STATIC_DRAW); glVertexPointer(2, GL_FLOAT, 0, BUFFER_OFFSET(0)); glEnableClientState(GL_VERTEX_ARRAY); glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buffers[INDICES]); glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW); glClear(GL_COLOR_BUFFER_BIT); glColor3f(1.0,1.0,1.0); glDrawElements(GL_POINTS, 16, GL_UNSIGNED_BYTE, BUFFER_OFFSET(0)); glutSwapBuffers(); } void init() { glClearColor(0.0, 0.0, 0.0, 0.0); gluOrtho2D((GLdouble) -1.0, (GLdouble) 90.0, (GLdouble) -1.0, (GLdouble) 90.0); } int main(int argv, char** argc) { glutInit(&argv, argc); glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE); glutInitWindowSize(500,500); glutInitWindowPosition(100,100); glutCreateWindow("myCode.cpp"); init(); glutDisplayFunc(display); glutMainLoop(); return 0; } Edit: The problem here is that drawing don't work at all. But I don't get any error, this just don't display what I want to display. Even if I put the code that make the vertices and put them in the buffers in a diferent function, this don't work. I just tried to do this: void display(void) { glBindVertexArray(VAO); glClear(GL_COLOR_BUFFER_BIT); glColor3f(1.0,1.0,1.0); glDrawElements(GL_POINTS, 16, GL_UNSIGNED_BYTE, BUFFER_OFFSET(0)); glutSwapBuffers(); } and I placed the rest of the code in display in another function that is called on the start of the program. But the problem still

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  • java: Read text file and store the info in an array using scanner class

    - by Amateur
    Hi, I have a text file include Student Grades like Kim $ 40 $ 45 Jack $ 35 $ 40 I'm trying to read this data from the text file and store the information into an array list using Scanner Class could any one guied me to write the code correctly ? Here is what I have so far public class ReadStudentsGrade { public static void main(String[] args) throws IOException { ArrayList stuRec = new ArrayList(); File file = new File("c:\\StudentGrade.txt"); try { Scanner scanner = new Scanner(file).useDelimiter("$"); while (scanner.hasNextLine()) { String stuName = scanner.nextLine(); int midTirmGrade = scanner.nextInt(); int finalGrade = scanner.nextInt(); System.out.println(stuName + " " + midTirmGrade + " " + finalGrade); } } catch (FileNotFoundException e) { e.printStackTrace(); } }

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  • PHP: testing for existence of a cell in a multidimensional array

    - by gidireich
    Hi, I have an array with numerous dimensions. Want to test for existence of a cell. The below cascaded approach, will be for sure a safe way to do it: if (array_key_exists($arr, 'dim1Key')) if (array_key_exists($arr['dim1Key'], 'dim2Key')) if (array_key_exists($arr['dim1Key']['dim2Key'], 'dim3Key')) echo "cell exists"; But it there a simpler way? I'll go into more details about this: 1. Can I perform this check in one single statement? 2. Do I have to use array_key_exist or can I use something like isset? Will appreciate if someone explains when to use each and why Thanks Gidi

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  • Array of pointers in objective-c

    - by Justin
    I'm getting confused by pointers in objective-c. Basically I have a bunch of static data in my code. static int dataSet0[2][2] = {{0, 1}, {2, 3}}; static int dataSet1[2][2] = {{4, 5}, {6, 7}}; And I want to have an array to index it all. dataSets[0]; //Would give me dataSet0... What should the type of dataSets be, and how would I initialize it?

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  • how to build an accumulator array in matlab

    - by schwiz
    I'm very new to matlab so sorry if this is a dumb question. I have to following matrices: im = imread('image.jpg'); %<370x366 double> [y,x] = find(im); %x & y both <1280x1 double> theta; %<370x366 double> computed from gradient of image I can currently plot points one at a time like this: plot(x(502) + 120*cos(theta(y(502),x(502))),y(502) + 120*sin(theta(y(502),x(502))),'*b'); But what I want to do is some how increment an accumulator array, something like this: acc = zeros(size(im)); acc(y,x) = acc(x + 120*cos(theta(y,x)),y + 120*sin(theta(y,x)),'*b')) + 1; It would be nice if the 120 could actually be another matrix containing different radius values as well.

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  • Can't make an array in C#

    - by Josh
    I'm trying to make a dynamic array in C# but I get an annoying error message. Here's my code: private void Form1_Load(object sender, EventArgs e) { int[] dataArray; Random random = new Random(); for (int i = 0; i < random.Next(1, 10); i++) { dataArray[i] = random.Next(1, 1000); } } And the error: Use of unassigned local variable 'dataArray' This is just baffling my mind. I came from VB, so please me gentle, lol. Cheers.

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  • mutidimensional array from javascript/jquery to ruby/sinatra

    - by user199368
    Hi, how do I pass a 2-dimensional array from javascript to ruby, please? I have this on client side: function send_data() { var testdata = { "1": { "name": "client_1", "note": "bigboy" }, "2": { "name": "client_2", "note": "smallboy" } } console.log(testdata); $.ajax({ type: 'POST', url: 'test', dataType: 'json', data: testdata }); } and this on server side: post '/test' do p params end but I can't get it right. The best I could get on server side is something like {"1"=>"[object Object]", "2"=>"[object Object]"} I tried to add JSON.stringify on client side and JSON.parse on server side, but the first resulted in {"{\"1\":{\"name\":\"client_1\",\"note\":\"bigboy\"},\"2\":{\"name\":\"client_2\",\"note\":\"smallboy\"}}"=>nil} while the latter has thrown a TypeError - can't convert Hash into String. Could anyone help, or maybe post a short snippet of correct code, please? Thank you

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  • Ruby - Call method passing values of array as each parameter

    - by Markus Orreilly
    I'm currently stuck on this problem. I've hooked into the method_missing function in a class I've made. When a function is called that doesn't exist, I want to call another function I know exists, passing the args array as all of the parameters to the second function. Does anyone know a way to do this? For example, I'd like to do something like this: class Blah def valid_method(p1, p2, p3, opt=false) puts "p1: #{p1}, p2: #{p2}, p3: #{p3}, opt: #{opt.inspect}" end def method_missing(methodname, *args) if methodname.to_s =~ /_with_opt$/ real_method = methodname.to_s.gsub(/_with_opt$/, '') send(real_method, args) # <-- this is the problem end end end b = Blah.new b.valid_method(1,2,3) # output: p1: 1, p2: 2, p3: 3, opt: false b.valid_method_with_opt(2,3,4) # output: p1: 2, p2: 3, p3: 4, opt: true (Oh, and btw, the above example doesn't work for me)

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