[data-structure] Forum Topics

How can implement a perfect hashed data structure using the four basic operations? Could I do something like this or do I need to break up my code into two different classes and then test the methods from another class's main method? public class PerfectHashed{ int ticketNumber; // keyfield String …

I am working creating a fully encapsulated, homogeneous singly linked data structure. The Listing class and SinglyLinkedList class that are part of the whole application compile fine, but the problem that I am having is performing different operations such as insert, fetch, update, and delete inside of a do-while loop …

This is a fingerprint verification application. When verifying,it loops through the table. if the current fingerprint template is the first one on the table row it verifies it correctly. But if the current fingerprint template is located on the 2nd or later rows, it loops through the table and at …

I want to filter data by day and month only excluding the year. For example I want to find people born from day 1 to day 15 in september without including years so what i did is like... Private Sub ButtonFilter_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ButtonFilter.Click …

Hi, I'm creating a program were logs files in a certain directory are presented in a table format. My issue here is, I created a filter option in which the user can filter data available in a particular year and month. I currently retrieved all the file dates and its …

Hey so I am trying to finish up a lab that I did not finish during a class this summer. The goal is to have the computer navigate an ASCII maze on its own. We use left/right hand rule to find our way through the maze. IE. you have your …

Hi everyone, im working on my FYP and have decided on this project title but im finding it a bit difficult in developing the ERD for the system. i came up with these entities: students,staff,administrator and assessment and would want any form of advice or contribution as i think there …

i have a logical error in my code where by i will read data into my four textboxes from sql database and the textboxes will be filled but when i click on a textbox the data will appear in the metrogrid(from metro framework) but when clicking another textbox the data …

I have 3 td's in a portion of a table. Sometimes, the data coming in from the database is less than 3. I need a method that will lay-out the data precisely compared to a rank in the table. Ideal situation: array |-0 |-name => Joe |-rank => 0 |-1 …

I need to write a program where a user inputs positive integers between 0 and 20 that uses an array to count how many times each integer is input. I cannot save integers that are input, i must save the count of integers that are input. I don't know where …

Hi, I have created a function that searches for a category in a category tree object and returns all the paths for it as an array of strings, please advice how I can improve it ? the result im getting now is : ["vehicles",["cars","mercedes"],["trucks","mercedes"],["motorcycles","BMW"]] i need it in one dimesional …

I would like to know Which are the python data structures uses divide and concur algorithm? Please explain me?

How do i solve the error that originates from the below code. DataSet info1 = this.GetData.getInfo("SELECT 0 AS EmpNo,Er.EmpID,(Er.FName&''&Er.LName) AS [Employee Name], Ed.DeptNo AS [Department No],Er.Gender AS [Sex] FROM (EmpRegist AS Er INNER JOIN EmployeeDept AS Ed ON Er.EmpId = Ed.EmpId) WHERE Ed.DeptId=" + (object)DpetID + " AND Ed.Status=0 AND …

I am learning to code and found interesting task, but i do not know where to start in solving it. So i have a file with some titles and comments which need to be placed under the right title. So the first line of the input contains a number N …

Dear Sir I have access data table and vb . project .access data table include ID ,word and description Colum v b project include three text box and one list box. If I search any word in text box through word Colum .I want show description Colum next text box …

hello expert, i have three dropdownlist option consist of two string and one datetime that convert into string. If i want to choose first and second dropdown without the third one which is datetime, it occur error "the string was not recognized as a valid datetime. there is an unknown …

I have problem in display image from access 2007 database to rdlc i work in windows form c# vs2015 Actually i need to display image from database to more records from access 2007 but i cannot in rdlc i do as following : In RDLC drag image control to report …

Good day guys, here is another question I have, working with vb.net community 15. I have a large datagridview to display all lessons for my school timetabling program. There could be up to 14 timeslots = lessons per day. Now I like a timetabler to be able swap days like …

now I know your first thought is going to be rotation matrices, but take a moment to think about how they're applied... I'm wondering if there isn't something more efficient, or if there really needs to be that many operations per bone and vertex. I'm looking for the smallest data …

Hi. I have this Semantic Network exercise with no answer and i just want to check if i am correct. Please check this image: http://imgur.com/a/iC0dW The exercise: Kassim is a 45 year old man who has 2 wives and 7 kids. He workds as a surgeon in a private hospital …

How to implement bucket sort in C using Linkedlist.. Or any weblinks please share...

I have scenario where one user can refer two codes to other one will become right and other left.Now this right can have two child left and right and so on same for left child user.... So this is binary tree like strucutre so i am selecting a user from …

please , tell me how i should start making a simple search engine.......what are the things i will need to learn.And how should i proceed?

is there anyway to improve my code's time complexity or memory's complexity ? (without using advanced methods - im a beginner) its a method that gets an array filled with zeroes and other numbers, and it changes each number(which is not a zero) to the distance of the closest zero …

Hi, i am using visual studio 2015 and trying to export data which i am importing through excel by the user selected Excel file. Now the importing part has been successfully completed i am using OLEDB Connection but Stuck in exporting the same data to a new Excel file. tried …

I have an existing table in an Access DB that I want my user to be able to copy by pressing a button. When the user presses the button, they should be prompted for what is to be the name of the table. The program should then copy the existing …

Good Day Lets say i have a array of integers.... -always differs in length I need to know all the possibilities the numbers in the string have to add up to a certain number. let say 5; and my array contains 1,3,4,3,5,8,2,1; than the possibilites would be.... (3,2)(4,1)(3,1,1) But i …

How to find array values is present in a string of shuffled letters. $string = "ankegsrdib"; $words = array("ask","bird","egg"); which function should I use to find this.? Also the result should be like this array("ask"=>"Yes","bird"=>"Yes","egg"="No") please suggest some ideas.

I would like to know any advice for creating a program that will read in a *.csv file and load the data into a 24 x 24 array for further processing. I am including a total of 48 records, so that you can see how the data looks and what …

I am using VB **Problem: **when i click on sort col and click on refresh button, than i get popup browers message "To display the webpage again, the web brower need to resend the infomation you've previously submitted." **Recreate this problem**: click on sorting col of gridview -> refresh page …

Is there a way to develop a GUI which has graph data structure at the backend so that if we want to have information about a particular node or edge, we just tap its corresponding GUI representation and the app gives us the required info?

Hello I'm new to python so I was thinking on building a simple neural network...I think I'm almost there and got an error, so I would really need a help right now. from PIL import Image from scipy.misc import imread import matplotlib.pyplot as plt import matplotlib.image as mpimg from pybrain.tools.shortcuts …

Hey Guys, I have a question... I want to display data from two different tables into a single datagrid view. Problem is i dnt wana join the tables. pls check this code [code]private void bindgrid() { SqlConnection con = new SqlConnection(connStr); con.Open(); str1 = "Select * from wcl_et "; str2 …

Hi, I have a form (FrmOverView) that’s based on a dataset containing a number of related tables, one of which is named TblCustomer. This form shows, amongst other things, Tblcustomer details in a gridview. What I want is to open another form (FrmCustomerDetails), that shows individual customer details in greater …

Hi! So, I have a dataset which is filled with data after a mysql SELECT Statement, I'll call the dataset dsResults.Tables("Results") Inside the dataset is data that I want to be filled into their respective text boxes. The columns in the dataset are expected to vary, for example, sometimes it …

This is a little discussion/example of design for modularity and re-use, inspired by javaAddict and Orlando Augusto posts in their thread “Dynamic Multidimensional Array Printing” https://www.daniweb.com/programming/software-development/code/305580/dynamic-multidimensional-array-printing That thread has 3 solutions to printing the contents of a multi-dimensional array of arbitrary dimensions - although in fact all the solutions will …

def binding_locations(strA, strB): The first parameter represents a strand of DNA. The second parameter is one strand from a recognition sequence. Return a list of all the indices where the recognition sequence appears in the DNA strand. (These are the restriction sites.) For example, if the DNA palindrome appears at …

hopefully soone can help me with this lol , this grammar im looking at is kinda tricy and i feel like theres something im missing. im trying to find the first and follow of the below grammar S -> [] | [S] | SS For the first I got: First(S) …

Hi guys. Well according to the research I had, and MP3 file structure is as follows: ` AAAAAAAA AAABBCCD EEEEFFGH IIJJKLMM ` which is refered to as frames, and each. Each letter is one bit. I've seen samples demonstrating how to get data from this but what I want is …

I am having a wrapper for example. public class Student{ public string Name{get;set} public int IDNumber{get;set;} public ObservableCollection<SubjectWrapper> Subjects{get;set;} } public class SubjectWrapper{ public string SubjectName{get;set;} public bool IsSubjectSelected{get;set;} } How can I bind this to Datagrid effectively.There could be any number of subject.All students will have all subject column …

getting conversion error I am creating a website using a VB Error: if I print getID1 Conversion from string to type 'Integer' is not valid. Error: if I print getID2 NullReferenceException was unhandled by user code. Object reference not set to an instance of an object. ** # .aspx file …

I am creating one application visual basic and sqlce I have two forms name Form1 and Form2. I used Form1 to add data to database using OLeDb command and used Form2 to show data in datagridview by using dataset I used following code: FFORM1 CODE is as following [code] Private …

What are some concepts of data structure and algorithm?

Hello, I have an array of data. And I want to know how can I detect duplicate and/or wrong data in array. This is my array of data: 135N258S 135N269B 136N112S 136N123D 135N269B 136K225D 136N124S 136N269B This data is OK. 135N258S 135N269B 136N112S 136N123D 136N124S 136N269B Wrong data is wrong …

I want to learn java for competitive programming . I'm actually aware of all the great books on java like thinking in java , effective java etc. But those books are very detailed . i want to learn enough for competitive programming without going into too much of unnecessary details …

I'm newbie to vb.net. Now I'm on report viewer component. I'm just trying to generate reports. It's okay with select data from one data table of mysql. But now I trying it advanced. I try to generate report data from two data tables. This is query I tried. It show …

hy ,i make binary tree,the input of binary tree in correct.but issues traversing of binary tree using stack ,because the result of traversing is wrong .please solve this issues. #include<iostream> #include<stack> using namespace std; struct node { int data; node *left; node *right; }; class usman { private: node *root,*leaf; …