Comparing Lists Of Strings - Copy And Display Elements?
Dec 20, 2009
I have two lists of strings. One is a list of all students in a class and the other is a list of students in the class that completed an assignment. The two lists are part:whole. So we have two loops for copying elements and displaying them in a list box for only the students who did submit.
Dim f As Integer
f = 0
Dim h As Integer
h = 0
While (usersinclass.Count > f)
h = 0
While (usersidthatsubmittedassingments.Count > h)
[Code] .....
What I need is the remaining portion of the "usersinclass" list. (i.e. The students who did not submit). I tried an Else statement BUT with nested loops, every element is guaranteed not to match at least once, so I was getting elements that shouldn't be there. So, is there anyway to run the given lists against each other again to pull out the remaining students? (preferably with no repeats).
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Apr 26, 2011
I have two array list same size, depending on the information gathered by previous functions. The size of the arrays range from 2 - 45 in length, both arrays always have the same length. I am trying to match one string in one array to another string in the second array. When they match then add Item to List.
Here is my
Do Until i = Arraylenght
info = Replace(myAL(s), " ", "")
SortedArrayList(m) = Replace(SortedArrayList(m), " ", "")
SortedLine = Split(SortedArrayList(m), "Price=")
If myAL(s).Contains(SortedLine(1)) Then
[Code] .....
This code works up to an array of not more then 4 in lenght, when working larger size array then 4, the minute it get to 5 I get this Error:
Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index
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Dec 27, 2009
I wish to read a web page that had various frames and div elements.To start with I would like to create a routine that justs lists all of those elements values and then display each element name and its value so I know what I have and how to reference it later on.I have been using the WebBrowser control and have managed to do a few basic things so far like go to a website and auto login.
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Dec 17, 2009
I'm creating <!-- /* Font Definitions */ @font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4; mso-font-charset:1; mso-generic-font-family:roman; mso-font-format:other; mso-font-pitch:variable; mso-font-signature:0 0 0 0 0 0;} @font-face {font-
[code].....
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Jul 9, 2010
I'm using VB.NET with .NET 2.0. I have two lists, and I want to compare the lists on a specific property in the object, not the object as a whole, and create a new list that contains objects that are in one list, but not the other.
myList1.Add(New Customer(1,"John","Doe")
myList1.Add(New Customer(2,"Jane","Doe")
myList2.Add(New Customer(1,"","")
Result in the above example would contain one customer, Jane Doe, because the identifier 2 wasn't in the second list.How can you compare these two List<T> or any IEnumerable<T> in .NET 2.0 (lacking LINQ)?
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Sep 19, 2010
I accept both C# and VB.NET suggestion, even though I'm writing an app in VB.NET I have two lists of intergers
List1 {1,2,3,5}
List2 {2,4,6,7}
I want to have new List3 {4,6,7} which is composed of elements of List2 that are not in List1. I know I can write a nice For Each loop for this but I want it done in LINQ I've been looking for such methods at Enumerable Methods, but I can't find it.
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Apr 14, 2012
For my first post I've got a tricky question. I'm past walking through tutorials but not far enough to join the Open Source Community.this Question I'm trying to create a program that tracks combinations used in Alchemy Games (Generally on a mobile phone etc)I've got the following classes
Class Game contains properties for Elements and Combinations
Class Elements Inherits List(Of Element)
Class Combinations Inherits List(Of Combination)
Class Element
Class Combination
Combination contains Element 1 and Element 2 and List(Of Element) for the results My Question: Using Game.Elements how can I add a readonly property for combinations of that element.
[Code]...
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Nov 19, 2011
I'll use this image to illustrate my question.
[URL]
Basically, how would I go about it searching through the listbox for "String 4" and then a messagebox coming up?
But, if it doesn't find that string an error message comes up.
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Aug 18, 2011
I'm trying to compare the selected item in a combo box to the items in a collection in search of a match. There is guaranteed to be a match because the combo box was originally populated from the same collection. This is the code I'm using:
[Code]....
This code works for other collections but not for this one. In this case, the loop stops after the first iteration, regardless of what's selected in the combo box. I have confirmed that the collection contains the correct data and that there is a match for the combo box options. The only difference between this instance and other instances is that the values in the collection and in the combo box contain a double quote at the end. I suspect this is what's causing the error. (To be clear, there is no error message, it's simply not returning the correct value.) I've tried various string compare methods but none of them have fixed the problem.
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Aug 10, 2009
Hopefully this question will have an easy answer; I've tried searching for the answer myself, but I don't know what to search for (I don't know what you would call this).
Is there a way to compare a string to see if it matches more than 1 value?
[Code]...
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Jan 21, 2010
Below two which is the best practice to compare strings...
If "A".ToLower = "a" Then
'....
End If
If String.Compare("A", "A", True) = 0 Then
'...
End If
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Mar 8, 2009
I have the following
Dim input As String
If e.KeyCode = Keys.Enter Then
[code].....
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Mar 14, 2010
I have a program that has a large set of classes in it. A certain incident (I won't call it an event, yet, as that has a specific meaning that will cause trouble later) needs to a relatively small subset of these classes a question. The subset of classes will need to respond to the question, but for it to be able to do so, the classes may first need to ask a similar question of the same subset, which may prompt yet a further question, though this recursion will never go more than three or four levels down. Since only a small subset of these classes will participate in the questions, while the majority will never participate, and since all of these classes are virtually identical, and I can know at design time whether any given class is part of the subset or not, an event is appropriate. The main class can raise an event, and those classes in the subset can handle the event, while those classes that are not in the subset won't handle the event. Furthermore, any of these classes can raise the event again with different parameters, as needed. Thus far, an event appears to be ideal.
The problem is this: As a result of the event, each class will need to add one or more strings to one of two lists. Event handlers can't return anything, so I can't be using the return values from functions to populate these lists.
Two options appear possible:
1) Include the two lists in the event arguments.
2) Have the two lists be accessible to all classes, and don't pass anything around.
The second part of the problem is that the event is effectively a question being asked of each class, and no action can be taken until each class has responded. If I simply raise an event and let each class respond, can I be certain that all classes that should respond have? An alternative solution would be to have each class expose a method, and call these methods for each class in turn. By doing this, I could get return values, but I would have to call the methods for ALL the classes, not just the subset that actually cares (the classes are all different types, but they all implement a common interface, and are added to a List (of ) that interface, so I can iterate through them all without much difficulty). So, the event seems more efficient, but adding a function to the common interface for the classes is the approach most certain of being a solution.
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Feb 14, 2010
Just wondering if anyone knows why does my authentication server fail at comparing strings? Also is there a better method of comparing strings than what im using below? User types in a textbox then sends text to server, server then checks it
[Code]...
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Feb 7, 2012
Im trying to get a ComboBox that would list all the pc on a netowrk, (Domain and/or WorkGroup)the idea is so that when i start typing the name of the pc list would come up with sugestions (nearest match)
[code]....
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Feb 23, 2012
this example shows my problem. I'm using VB.net 2010
Public Class Form1
Public Class BonoType
Public name As String
[Code].....
What happens is "Goose" is not only stored in tory(1) but also in tory1(1), how can I stop this.
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Jan 10, 2012
I read a line from a text file with text as "ABC.txt", "XYZ.txt", "TEST.txt".I use code file = sr.ReadLine(); to assign the text to variable file. Now I want to initiate a string array likestring[] FileNames = {file}; it doesn't work. What should I do?
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Sep 19, 2011
I want to create a website where it is possible to add dynamically "X" dropdown-lists (or other elements)These dropdown-lists should be shown on the website and furthermore there should be an other element be shown, that depends on the dropdown-list (for example: if the user chooses option "A" there is a checkbox, if the user chooses "B" there is a input field)
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Jan 4, 2011
I'm trying to read the XML I generated. Here's my writing code:
'XML EXPORTATION BEGIN
'Create the file
Dim myXmlTextWriter As XmlTextWriter = New XmlTextWriter("C:Simple TimerProfiles" + timer_name + ".xml", System.Text.Encoding.UTF8)
'Choose Formatting
myXmlTextWriter.Formatting = System.Xml.Formatting.Indented
[Code] .....
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Apr 4, 2011
How would I create a list of elements in VB.NET, save it to a .dat file, and make Ruby re-create such list (as an array) with such elements (they will be strings, booleans and integers)?
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Mar 20, 2011
Ok this is a hw assignment like always....just not sure on how to do the math on this form...the constants are declared for the registration fees and i did the same for the required days at each work shop i just need to find a way to multiply the days required at each workshop by the lodging fees. but i also need to display the lists of costs so its pretty complicated.
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Jun 14, 2010
I am trying to pull a set of html elements from a webpages to copy all the links on the page and toss them into a richtextbox.The tags are <a href "I need everything inside the quotes"but for the life of me I cannot figure out of to work the line of code to accomplish this..
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Jun 26, 2011
I use a DataGridView to display filtered lists from a SQL data base.I've used this method on almost 100 Different objects.Today i'm getting a strange error from the DGV on only one of them, If you try to select an item in the list
[Code]...
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Aug 15, 2008
I am trying to write a program in VB2008 Express. I originally wrote it in excel, but I want to add some features and make it a standalone executable. the program is ideal for a spreadsheet application though.
essentially, there are two input tables. each containing about 6 columns and maybe 10 rows. I assume that could be handled by arrays. the output would be a continuously updated table of output based on calculations using the data from the two input tables. the output table would be about 4 columns by up to 1000+ rows, and would need to be recalculated and displayed each time any data in the input tables has changed.
first, are arrays sufficient to handle this? would databases be more appropriate?
second, what's the best way to display a long list of output, that has a user defined length and is continually updated. it would also be nice to have the ability to click on an individual cell (or value) in the output and have more code executed.
is there a way to incorporate a spreadsheet like tool for this as a backend? I want to make sure i'm using the most efficient approach before i invest too much time.
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May 14, 2009
I have a DataGridView that has some columns with dates. It binds to an in-memory Datatable which gets loaded from an string array of data passed back from the backend Some of the rows returned have nulls for the date columns. Solution 1: If I define the Date column in the DataTable as "string" I can easily convert those nulls to empty strings and display it in the grid as empty strings (desired results). However, if the user clicks on the date column header to sort by date, it doesn't order the rows as you want. You get a purely string sort order. Not acceptable
[Code]...
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Apr 12, 2010
I am trying to use the Boot log and I really don't have much experience with parsing and comparing. What I need to do is to get only the minutes and seconds time stamp from a string similar to this from the boot log
Did not load driver SystemRootSystem32DRIVERSsrv.sys
Loaded driver SystemRootsystem32DRIVERSMpNWMon.sys
Microsoft (R) Windows (R) Version 6.1 (Build 7600)
4 11 2010 23:40:47.375
Loaded driver SystemRootsystem32
tkrnlpa.exe
Next once I get the minutes and seconds subtract 5 seconds
Next compare the resulting minutes and seconds to the minutes and seconds from a second file and display the result
EXAMPLE: If you take the minutes and seconds from above 40:47 - 5 = 40:42.
Next you get the minutes and seconds from the second file and you get 40:59
So you wind up with 40:59 - 40:42 = 00:17
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Aug 25, 2010
I cant seem to think this morning.I am trying to compare version strings. These are scraped off a website...
examples:
4.5.0.55
4.2.2.128
4.5.0.37
5.0.0.713
how do i make sure I am grabbing the highest version?right now I have it checking the length, if less than 9 .. add a zero. then remove the .'s and convert to an integer. then just check. I know thats not the best and most accurate.
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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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Jan 6, 2009
I want to create a file upload client for uploading.com and I wanted to know if it is possible to make an application that lets you select a file from your hard drive, press an upload button and then the app will process it just like the website processes the file when you use a browser.Also I want the app to display the progress bar that the website displays when you upload, and when it's done, it has to get the URL for the uploaded file and display it in a textbox.Why not just use the website you ask? Well, I'm planning to make this into a bigger app but nothing will really work unless I get this to work first, so I have to start here.
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May 22, 2011
Here is the code that I am trying to use but it doesn't seem to do anything really.
Got any ideas on how I can do this?
Private Sub WebBrowser1_DocumentCompleted(ByVal sender As System.Object, ByVal e As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs) Handles WebBrowser1.DocumentCompleted
Dim allelements As HtmlElementCollection = WebBrowser1.Document.All
For Each webpageelement As HtmlElement In allelements
If webpageelement.InnerText = ("Username") Then
[Code]...
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