[data-structure] Forum Topics

Hello, I need to store data in large lists (~e7 elements) and I often get a memory error in code that looks like: [code=python] f = open('data.txt','r') for line in f: list1.append(line.split(',')[1]) list2.append(line.split(',')[2]) # etc. [/code] I get the error when reading-in the data, but I don't really need all …

Hi everyone , i try to validate a [string ID] when user input it in a textBox(C#)for searching datarows in database , but it does not send a message "False Input" if i input a wrong string ID which is different from database . protected void button_search(object sender, EventArgs e) …

Dear all, I have something very weird, never experienced it before with c# express edition - i have a piece of selection query that selects all the records within a specific month. - this query works very fine in msaccess, but doesnt work in the run time in c#. so …

Hi guys, For multi dimentional arrays, i know the amount of columns- 3. But I do not know the amount of rows because each input file has a diff. no. of rows(which can go up to a few thousands). So how do I make an array out of it? Thank …

Hi, I wrote a piece of code for doing a recursive printing of all the leaf nodes. But it is not moving beyond one or two levels. Here is the code: [code=php] $root = array( "paa" => array ( "adi1" => array ( "cir1" => array ( "aka", "ra", "vinodh","dkido" …

Hello! I have a Case Study Scenario for which ERD & Use Case Diagram are required. My question is... Should Use Case Actors be the same number of Entities into ERD? E.g. If i have 5 actors in UML it means that I should also have 5 entities of these …

i have a scenario where i need to know what are the entities it has. i found 5 entities. 1- Company 2- Customer 3- Package 4- Shipment 5- Staff I have been told that the company is not an entity. is it true here in this scenario? it says that …

Hello, I am a student and I just finished my first domain model, but I am uncertain if it is correct. Please take a look, any suggestions will be appreciated! :) Here's the assignment description: [I]The idea is that there will be an interactive website, on which users can review …

Hi all, Have been working with datagridviews with datasets, bindingsources, comboboxes, etc. I was having a problem that prompted me to ask a question. First, the problem that I was having. I created a datagridview that was bound to a dataset and then added code that created columns and some …

I have written two programs that encrypts and sends and decrypts and receives a text file in asm. The program works fine, the problem I'm having is setting up the com1 port. The transmitter sends the file fine, but the receiver cannot receive the file until i have set up …

Hi Below is the XML structure <?xml version="1.0" encoding="utf-8" ?> - <Salary> <empNo Required="true" List=”false ></empNo> <Basic Required="true" List="false” >Basic Salary</Basic> <HRA List="false” >Housing Allow</HRA> <TA List="false” >TA</TA> <Others List="true >Other Allowances</Others> <Total List="false” Required="True">Total Salary</Total> - <Sex List="true"> Sex <gender>Male</gender> <geneder>Femal</geneder> </Sex> </Salary> I am having a requirement of …

Hi, We were asked to make a Binary Search Tree program in C. It should be able to traverse the numbers (preorder, inorder, postorder) then display it. And locate the number and display it. And locate the number to delete, delete it, then display the number that was deleted before …

Hi all. This is the scenario that i have right now. i have a stored procedure created in MS SQL 2000 and is linked to my C# program. The stored procedure contains four select statements (which means it will return 4 tables). In my program, I have four datagrids and …

Hi, I am trying to implement a binary tree(not sorted) using recursion. I have figured out most of my function however GetMax and GetMin are confusing me. [CODE]#include <stdio.h> #include <stdlib.h> #include <limits.h> typedef int TreeEntry; typedef struct binary_tree_node { TreeEntry item; struct binary_tree_node * left; struct binary_tree_node * right; …

When I ran a program that had a list of integers with 5000000 elements in it, I was surprised to find that it used 118MB of memory, even when the *only* thing done by the program is the creation of the list. As far as I understand, each node in …

Hello, I am trying to understand the concept of a digital map in a navigation system in a car. Every car today has a GPS installed inside. It calculates the position of the CAR with the GPS and plot the position on the Digital map. The digtal map has a …

I have Repeater it is changes based on one dropdownlist. Now when value of dropdownlist is changed then repeater also change. How I preserved data of repeater. Is datatable is ok for that?

I have a problem in which we are given 2 sets A and B and we have to find set C which contains elements common to A and B.The set A and B can contain duplicates and set C is expected to contain distinct elements(i.e no repetition of the same …

HI, I have a requirement where I need to compare the data in different database(tables having same structure/schema). I know manually I can execute the queries in each database, compare the results and it is done. As this execution is repetitive in nature, how I can automate this. Thanks In …

Someone please help me before I smash my computer. Every time I try to update a database using my data adapters update method I get the following error.....[B]Object variable or With block variable not set.[/B] I can't for the life of me figure out why this is happening. Here's the …

Hello sir, I have add one listbox in my code. i'm assigning data to the list box at runtime from DataSet. The Value member of the ListBox is EmployeeID and Display member of the ListBox is EmployeeName. [B][U]User Can Select Multiple EmployeeNames at Run time [/U][/B]. Now I want to …

This is my first attempt at a report in VB.net As a simple start I have form1 with a button to call the report I defined the Dataset for the report using a stored procedure with no parameters although idealy the next stage would be a parameter in the stored …

hello i have project for billing and codeing. i work in team, when i start create database i totally forget about naming convention and i choose my name. now i need to change that database name according to my team member's database name. should i able to change my database …

Problem 1: I was wondering if it's possible to add for example the struct below into a binary tree: [CODE=c] struct Appoint { string place; string title; int hour, minute; int durationHr, durationMin; }; [/CODE] I want the above struct to be sorted in the binary tree by hour and …

Can some one please help me on this issue as I have spent time going around it without making any headway. I have data in an array of size say 3O. 1. I want to take the first five elements of the array, find their mean value. Store the value …

Does anyone know an easy way to do array's of arrays? I'm not 100% sure this is the thing I want though because I just need a simple way to make a loop able to change the list it's comparing. I have the loop done, I just can't figure out …

Dear all, let me explain how my datagrid work. The datagrid have 10 columns and 21 rows. The datagrid value will be updated every 5 minutes. Actually what I want is to compare the value before 10minutes with the current value which show in the datagrid. The value that I …

hey can u help me out with the below problem The problem i that when i click on country i should be able to select the corresponding states...i have done this in asp.net and it works fine but here when i try to select the country here nothing happens and …

Hello, I'm trying to create an app where the user can search the database using different controls. For example let's say the user can search by date (calendar control), country (DropDownList), states (DropDownList) and cities (DropDownList). So far I have the DropDown controls working. The user selects whatever they want …

im trying to open a document...but every time i get a dialoge box asking if i want to pen,save or cancel.i just want to open the document.can someone tell me wot im doing wrong?here's my code [code] if (objView.extension == ".pdf" || objView.extension == ".xls" || objView.extension == ".xlsx" || …

using System; using System.Collections; using System.Configuration; using System.Data; using System.Linq; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.HtmlControls; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Xml.Linq; using System.Data.SqlClient; public partial class userreg : System.Web.UI.Page { SqlConnection con; protected void Page_Load(object sender, EventArgs e) { } protected void ImageButton1_Click(object sender, ImageClickEventArgs e) { …

im trying to open a document...but every time i get a dialoge box asking if i want to pen,save or cancel.i just want to open the document.can someone tell me wot im doing wrong?here's my code [code] if (objView.extension == ".pdf" || objView.extension == ".xls" || objView.extension == ".xlsx" || …

I am pretty new to the Jython world, I have a need to create the jvm custom properties but i am king on struck at array. please provide expertise suggestion.. Here is my code snippet : ### JVM CUSTOM PROPERTIES SCRIPT ### fileOpen = open("/tmp/jvmname.props", "r") fileRead = fileOpen.read() server …

How can I connect to a SQL server(not SQL Compact Edition)Database from my Smart device. I am a bit stuck on this because the connection string does not seem to work it gives me a (Null reference error) I checked the SQLcommand text and that was working properly as well …

I'm having trouble with using a multiset of my own data structure. It seems to complain about my comparison (less than) function when I try to iterate, but it works at some level because I can insert() stuff and call functions from the first member of the multiset. If anyone …

I'm looking to write a program that should be capable of holding around 1000 records, each record will contain a varying number of fields and values. Usually, I'd create a list of dictionaries for something like this but wanted to know if that's the right way to go about it. …

Title: Comparing arrays Hello I am having a problem getting the difference between two arrays. The first array $list has all codes that can be linked to a specific id The second array $exist has the values select and linked to a specfic id. Both arrays are storing integers array …

Hi, I am having a very hard time understanding what I am doing wrong here. I am trying to read from a file into a struct array, however it stops working properly after a short while. my data in the file is in the following format: Last, First Name ID …

Dear All, I have an assignment that I ahve to buld a predictive messageing service. Now since I have split the program in different segments I need help with one of them. I have decided to use suffix tree and then manipulate the nodes. The problem is that I can't …

Hi guys, Just a quick question, I'm working on a general stack class for use with my card game and rather than creating an overloaded constructor for every single object and primitive type I'm wondering is there a way to supply the data type when invoking a basic constructor? Basically …

hello, i want to write a program that store subjects and days in two enumerations and their values in rows and coloumn using 2D array. how can i do this ? see the image below: [url]http://img718.imageshack.us/img718/3967/sufyan.jpg[/url] So far i've done this, [CODE] class EnumProg { enum Days {Monday, Tuesday, Wednesday, …

I'll start by saying that I've solved the problem I had, I'm just trying to gain an understanding of exactly what caused it in the first place. Please note I'm cutting out as much middle-man code as I possibly can for understanding purposes. My program is currently setup so that …

Hi all, I wish to construct an text editor with linear link list. Now I am writing a function to add a sentence into it and display all. My problem is I can only input a string as it will not take whitespace as input. And I don't understand what …

I can't seem to pass a struct address to a function. My program "stops working" when it gets to the scanf statement of the getReady function. [CODE]/**************************************************** Author: ---------------------------------------------------------------------- Purpose: This code will explore passing a data structure address to a function. ****************************************************/ #include <stdio> #include <stdlib> //prototypes: struct things{ …

Hello All, I am trying to add data from a dataset to an access table(.mdb). I am getting this error when I try to insert the values in the table. This is the code [code]DataSet ds = new DataSet(); Console.Write("The NAME IS: " + FileName.Text.ToString()); ds.ReadXml("C:\\Dallas_Test\\Offense_7_1_2010\\" + FileName.Text.ToString()); ADOX.Catalog cat …

Hi Guys, i have parsed an xml file below and want to create another class with data structure and pass these values to those data structure. [code] using System; using System.Collections.Generic; using System.Collections; using System.ComponentModel; using System.Data; using System.Data.Sql; using System.Data.SqlClient; using System.Drawing; using System.Text; using System.Windows.Forms; using System.IO; using …

I have a datagridview generated by a dataset. I'm new to windows form, how to do this?

[CODE] #include<stdio.h> #include<conio.h> #include<stdio.h> void maketree(struct node**); void inorder(struct node**); struct node{ struct node *left; struct node *right; int data; } void main() { struct node *root; root=NULL; printf("Enter root"); maketree(&root); preorder(&root); getch(); } void maketree(struct node **root) { int num; struct node *temp; if(*root==NULL){ //printf("Enter number"); scanf("%d",&num); temp=(struct node*)malloc(sizeof(struct …

[COLOR="Green"]handles clouse require a withevent variable defined in containing type or one of its base type[/COLOR] [U]i got this error in the following code[/U] Imports System.Data Imports System.Data.SqlClient Imports System.Text Partial Class _Default Inherits System.Web.UI.Page Protected Sub submit2_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles submit2.Click Dim i As …

I am learning stacks, and I am trying to get this program to work. I have to be able to add large integers such as 9999999999999999999999999 by pushing all the numbers on the stack and then adding them up. Currently it works with small numbers but large numbers it crashes. …