Way To Keep These Arrays As Small As Needed While Being Able To Add New Elements On Fly
Apr 30, 2009
I have 3 arrays setup for use in my program. The first array has item level detail and will have a known number of elements. The second array has more of a table level detail and will have an unknown number of elements that will need to grow as the user enters data The 3rd array will also be of unknown size but matching the second array and will be used for indexing purposes at runtime.The question is what would be the best and hopefully fastest way to keep these arrays as small as needed while being able to add new elements on the fly without rebuilding the entire array. Ideally I would like the code to run as fast as possible in as little memory as possible.
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Mar 16, 2009
I'm having trouble getting started with this application I need to do. Here are the details:
Its an application to calculate student grades for a group project. Create a text file to store names of 5 students, line by line. In a separate file enter peer evaluations from 0 to 1.0. Enter these numbers for evaluations:
1.0, 0.8, 0.9, 1.0, 0.6
0.2, 0.9, 0.5, 0.6, 0.7
0.5, 1.0, 1.0, 1.5, 0.9
0.9, 0.9, 0.9, 1.0, 1.0
1.0, 0.9, 1.0, 0.8, 0.9
This means that student 1 gave 1.0 evaluation for himself , 0.8 for student 2, 0.9 for student 3 etc.Student 2 gave 0.2 for student 1, 0.9 for him- herself, 0.5 for student 3 etc. Read these into a 2-dimensional array. If any of the values is greater than 1.0, set them to 1.0. The program should calculate the average evaluation for a student. While doing so, the program should ignore evaluations that student gave to him-herself. Populate a list box with student names when the form loads. The user should enter a project grade (same for everyone) in a textbox. Then the user can select a student from a list and click �Calculate� button. The program should display the project grade for that student by multiplying average evaluation by the grade for the whole group (project grade).
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Apr 11, 2009
How do i divide an array into small 5 arrays.it is a byte array
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Nov 26, 2011
I'm having a problem to deserialize a XML to my class. It was working fine until a put the array det within the class. I put a watch just after the deserialization occurs (data = Ctype(...)), and I can see that all the informationswere loaded (ide, emit, dest) correctly except for the det element: The det whose nItem=1 attribute is loaded, but det whose nItem=2 attribute is not. With the watch, I could see that the object was loaded like a single variable, not a vector as I specified in the property declaration.
Below is where the deserialization happens when the button is clicked:
Protected Sub btnDes_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnDes.Click
Dim data As New nf
'DeSerializacao XML
Dim Deserializer As New Serialization.XmlSerializer(GetType(nf))
[Code] .....
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Oct 21, 2009
I read and the display values associated to a unidimensional array(called vec that has 5 elements) and a multidimensional array called
matr(that has 4 elements).And I'm displaying the associated values for each of the 2 arrays (vec-unidimensional array and matr multidimensional array).My problem is that I want to display for both arrays the elements using For Each statement.
Here is the code:
Module Module1
Sub Main()
Dim vec(4) As Integer 'declarare tablou unidimensional -vector de numere intregi
Dim matr(2, 2) As Integer 'declarare tablou multidimensional -matrice 2x2 de numere intregi
vec(0) = 45 ' setam primul element din vector la valoarea 45 -primul element are index=0
[code].....
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Apr 13, 2010
I have a control array of custom picture boxes on my form, say PibBox1, PicBox2 etc. Now, I want to access the individual click events of this control arrays. For eg: If we have three PicBox1, PicBox2, PicBox3 on the form, I want to move into the click event of each of these and assign a value to a variable PicSeletced =1, PicSeletced =2, PicSeletced =3 accordingly as the PicBox1, PicBox2, PicBox3 are clicked. But I don't know how to move into the individual click events of the control array.
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Dec 25, 2011
I need help to form a code for a small arrays manipulation. The input data are known: they are two integers "N" and "s". An integer "N" is always divisible by 4.I need to create an array of "N" members, by repeating (N/4 times) this sub-array: 1,2,2,1 (always is the same). In the picture, this is shown in blue. Then I need to add the same array to the existing array, but shifted for "s" places (red array). The result is "yes" if each sum in new columns is always the same (3). Otherwise the result is "no." note there is no need to draw or display something (DGV, table ...). The required result is only "yes" or "no".
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Nov 5, 2009
How to get values for array elements in VB.nET from the user.also i wanted to display these values in the combo box.[this is easy i could manage this].
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Feb 27, 2009
I need to set up a list consisting of arrays of two elements. Simple, right?
Like: (code snippet):
Dim strDataPoint(1) As String '2-element array
Dim lBiasCurve As New List(Of strDataPoint) 'list of 2-element arrays
Dim lPwrCurve As New List(Of strDataPoint) 'another list of 2-element arrays
But this gives me an error msg on 2nd and 3rd line: type strDataPoint is not defined....
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Aug 27, 2010
I need to make a small programm for ticketing on a parking for a small hotel.So i have 2 Printers pariking In (for delivery of the tickets) and 2 Readers PArking Out.Both Printers and REaders are working Serial.So i need to poll the serial ports of the printers and readers every second.The data is stored on a SQL database so i need to read and write in the database.Can i do this with 1 PC and 1 programm or 1 PC and 4 programms that are runnning at the same time ?
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Feb 1, 2010
On form 1 , i have a number of buttons that open up different websites.What i want to do is when i click a button on form 1 , i want forum 2 to show ( Form2.show() ) , Form 2 will have a list (Buttons) of internet browsers.
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Sep 17, 2010
I created a method and pass the element type, id, and any inner text that instantiates a new html element. The last statement: Me.Controls.Add(element) adds it to the end of the page, but I would like it to be inserted in a specific position (between 2 divs within a form). What I am describing is very similar to this post on SO here, although it was for javascript.
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Jan 2, 2010
Dim Document = XDocument.Load(FileName)
Dim findElement = Document.Elements("GradeProfile")
[code]....
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May 9, 2010
In VB6 I load a recordset containg all of the records (6 fields per record)in a table into an XArray and then manipulate the records in the array and then write them back to the original table. The array issorted by the first field (1 to maybe 8000 or more) I need to find records in the array by an ID field and then move them (because of some external criteria that happens many times) from say number 400 to number 375. Then all of the other records between 375 and 399 were renumbered up 1 to fill the gaps left by the move.
The XArray worked well as it could find and also move to a next record easily to facilitate the revisions to each record quickly. Everything is done in VB6 in code and nothing visual needs to be shown to the user until say 2000 of these external changes are complete. What is the best, most efficient way to do this in the .Net framework in VB2010. Datasets, Dataviews. tableadapters, arrays. enums ?
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Dec 10, 2009
My assignment is to have a user enter in big integers using what i think is two parallel arrays. I got this far but now im stuck. I think i need to actually convert the text box input into an array but i do not know how to do that. I am all over the place in this project.
'Created/ Revised by: Jessica Falcetta
'Cap 204 Final Project: Big Integer Project
'Project Purpose: To calculate large integers through parallel arrays
[CODE]...
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Feb 2, 2010
I have a VB.net console app and I am opening a function in a dll written in fortran. I am passing 3 arrays through the function by reference. When they come back out the otherside they ahve all tunred to arrays of only one element And that element is 0.I read on the internet somewhere that when doing this kind of thing it is a good idea to only pass the first element of the array into the function.I tried changing my function declaration to accepting single elements rather than single dimensional arrays, and now the arrays are the same length before and after the function call, but they don't seem to be changing at all, so i'm not sure that this is working
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Oct 30, 2010
the statement Dim state(49) As String and maintain a list of certain states. The list of states should always be in alphabetical order and occupy consecutive elements of the array. The buttons in the program should give the user the following options: (a) Take the state specified by the user in a text box and insert it into its proper position in the array. If the state is already in the array, so report. (b) Take the state specified by the user in a text box and delete it from the array. If the state is not in the array, so report. (c) Display the states in the array. "
Private Sub states_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
state(0) = "Alabama"
[code]....
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Nov 13, 2010
I have a executable that connects to a remote database using MySQL connector so it uses the MySql.Data.dll would like to know if I can somehow call the dll only when needed so I don't have to import itwhy I want this?well for example if the MySql.Data.dll is missing the executable just crashes without any details
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May 3, 2010
I was wondering if anyone knows a built in method ( LINQ say or a LAMBDA expression or other way ) that you can compare2 arrays - collections that would be valid for an equivalent 3rd array - collection which is a combination of the 1st two.
As an example consider;
* * *
A L E
[code].....
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Oct 13, 2009
How can I sort three arrays so they are sorted together (the other two arrays are in sync with the first)?unsorted unsorted unsortedarray1]CODE]....
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Nov 24, 2009
how to calculate how many cards are needed at least to make a straight in texas hold'em?
pratic examples:[code..]
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Nov 1, 2011
I write programs in VB 2010 which uses .Net Framework 4.0. However my school currently only has .Net Framework 3.1 (3.something, think its 1)Is there anyway i can "downgrade" the needed .net framework, or even just select another .net version to use?
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Dec 21, 2009
Obviously error handling is a major factor in making a good application. If a error happens letting a user know what has gone wrong.But some times error handling may(i think) not be needed. Example.
Private Sub RemoveCheckedl()
Try
For Each Item As ListViewItem In lst.CheckedItems[code]....
also when error handling it's could to think about what type of errors could be made.
Catch ex As Exception
MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
even though this catches the error and displays a msg, it may not be a great message for the user so he/she can understand.
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Jun 4, 2010
I really need to create very huge 2D matrices such as 5x5, 10x10, 7x7 and use them for basic Matrix calculations involving Matrix multiplication, Transpose and Inverse.
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Oct 12, 2009
I have just downloaded Visual Basic Express 2008, I have previously only ever used access and I have a rather stupid and basic question to ask! I have a button and am trying to enter the very simple code so that when it is clicked it opens Form2, I am unsure as to how this is written as the "expression" I would have used in access obviously doesnt work.
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Jul 13, 2010
I'm wondered how to make program that not needed to install. Only click the icon and its working and resource folder too. When I'll do build program it makes program thats needed to install.
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Oct 5, 2010
I am trying to print a Rich Text Box in VB.Net. There is a good example at:BUT, when I copy the code I get errors onImports System.Windows.Controls
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Oct 24, 2009
On my emailer program ive created a messagebox to appear if any of the textboxes are empty when i clcik send, its works fine (first time) but if i leave a textbox empty for the second time and click send i get an error.[code]
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Apr 19, 2011
The program has 3 list boxes and the user is supposed to choose an option from the 1st and 2nd list box and add the total in the third list box, when i run the program all i get is $0.00. I was told a loop was needed, but I'm not sure where I need to put it and what kind of loop I nee
Dim Day As Integer
Dim Total, Fee, Stay As Double
Dim Workshop As String = lstWorkshop.SelectedIndex()
[code]......
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Oct 23, 2009
Could anyone give me the prequisites needed for a LAN Instant Messaging Application?And then, if possible, a step-by-step explanation of how this is accomplished, or a link to a good tutorial?
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