How To Reverse A Stack
Apr 21, 2011
I need to write a VB.NET code to reverse the given characters using a stack.Input: 'S','T','A','C','K' So far I have input the letters, but I don't know how to get the console to reverse it. I'm a beginner to programming so please excuse my ignorance.
Module Module1
Sub Main()
Dim StackObject As New Stack
[code].....
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Mar 30, 2011
I'm trying to use a stack object to reverse the order of words (not letters) in a sentence. I'm fairly sure that the split and push methods are working, but I can only get the first word (i.e. the first word in the original sentence), to be displayed.
I have the following code:
Private Sub btnReverse_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnReverse.Click
Dim s As New Stack
[Code].....
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Apr 5, 2010
I need to reverse a string of words without using the reverse function. This is what I have so far, BUT it only shows the last two letters. For example: if i type "John" it will only give me "ho"
Public Class frmReverse
Dim original As String
Dim New1 As String
[code]....
I need to this without using things we haven't seen in class.
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Dec 16, 2010
I have the array dimensioned as public to the form. I populate the array on Form1_Load.When I click the button btnReversingAnArray the first time all are sorted in reverse except for Wendy and it is the last item shown. ie..(The book I am even shows an image of the list Box and their example also shows Wendy as the last item)
Richard
Michelle
Jay
Harriet
Wendy
Then I do nothing else except I click the button btnReversingAnArray again and then it displays correctly.
Wendy
Richard
Michelle
[code]....
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Oct 13, 2009
In your actual programming experience, how did this knowledge of STACK and HEAP actually rescue you in real life? Any story from the trenches? Or is this concept good for filling up programming books and good for theory?
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Mar 10, 2010
What I want to know is that in VB.net is it possible to get a stack overflow, and if so how is it caused. What I mean is, what sort of written code would cause a stack to overflow.
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Apr 15, 2009
I've started using .Net's stack collection. The basic features I guess are the "pop" and "push", where you add or take off the top element of the stack (if you are referencing other elements in the stack then another collection type is probably better).[URL]..it appears that the Stack collection (like other collections) is basically an array with some window dressing (so you actually can see other elements). As far as I can tell, "popping" and "pushing" is changing the first element of the array. Shouldn't instead the final element be the "top" of the stack and be the one that is changed? Otherwise the program has to reindex all the other elements in the array every time a pop or push is made. This seems very inefficient. But this is what Microsoft's description appears to be saying what is happening.
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Jun 22, 2009
My problem is that i need log the stack call. I know that i can put a breakpoint in code and choose the debug menu option "call stack", But that is not a solution for me, because i need all the methods called by the application, not only the last until the breakpoint.
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Apr 14, 2009
I just started programming in VB.NET 2008 with the Express edition and have been having a blast so far. I thought a fun program to try and make would be an infix to postfix program.
I have five text boxes off to the side of my program that shows what is on the stack as you iterate through the equation. I'm wondering if it's possible to make these textboxes set to display what is at a certain index of a stack.
For example, if I pushed a "(" onto the stack, I would like the top box of my textboxes to update and show a "(". When something else is pushed onto the stack, say a "/", I would like the "(" to be displayed in the second box down, and the "/" to be displayed in the top box now.
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May 11, 2010
I did alot of work then I suddenly get this error message
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Jan 7, 2009
We have this funky little ObjectDisposedException happening now and again. But only on production machines, of course ... can't recreate the issue on my dev unit. So I trotted on out to the Microsoft site to see what members of this exception I could use to figure out what's going on. Microsoft says that one of the members is StackTrace. I double and triple checked that I'm looking at .Net 1.1 information as I'm pretty sure that's what I'm using (how can I check that?). Here's the page I found - [URL]
So I go back to my program to write something useful to the event log so I can figure out what's going on. And when I look at the members of the ObjectDisposedException available to me I only see the following: GetBaseException, GetType, InnerException, Message, ObjectName, ToString.
what happened to my StackTrace member? I sure could use it if I could figure out how to get to it.
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Oct 23, 2010
As a learning experience I decided to try and implement the Shunting Yard Algorithm(string calculator) using OOP. It was successful for as far as I took it, but it had one flaw. In order to get the stack to be accessible from the operators I had to declare it as shared, which meant that all versions of the calculator shared one stack. This very short piece of code illustrates what I came up with and the "flaw". [code] How can I maintain the functionality of anOP.add1 without declaring "something" as shared?
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Oct 31, 2010
this exception gets raised on a standard dim command???
Public Sub Life(ByVal AnyEvent As Object) Dim myNewLife As New Life Dim Happiness As New Collection Happiness.Add(AnyEvent) myNewLife.Experience(Happiness) End Sub
[code].....
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Oct 24, 2011
I want to put a two dimensional array into a stack and then check the stack to see if it contains the first dimension of the array. Is there any way to override the contains function to do this.
Example:
Dim MyStack as stack
Dim sItems(0,2) as string
sItems(0,0)="Error 1"[codee].....
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Oct 27, 2009
I'm writing this program in Visual Basic .NET to organize different fields of data, and I'm using profile slots through application settings to store the data for users. But, I ran into a stack overflow error in my SlotSelect.vb class. My best plausible guess for why this happens is that I'm using the wrong kind of variable container in the below sauce code, but my dilemma is that I don't know what specifically is going wrong.The code that the vshost is saying is the cause for the overflow was written from some code that I looked up on MSDN and other places for referring to objects in other classes, and I tried using other variants of it to see if it was any different. So far, nothing has worked, and it doesn't stop the error while compiling, much less in the code markup--it only catches it when it starts the application in debug after it finishes building
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Oct 2, 2010
I'm implementing multi-level undo/redo via a pair of stacks. This works well, but I'd like to limit the number of undo actions (actually objects representing the state of the application) . Once the limit of actions in the stack has been reached, I want to keep adding actions to the stack, but get rid of the oldest (bottom) items as I go.
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Jan 14, 2012
I have a string called "homepage" like so:Dim homepage As Stringhomepage = TextBox1.TextAs an example, homepage equalsDim i As String = Microsoft.VisualBasic.Right(homepage, (InStr(homepage, ".")))abel1.Text = iThat code should select all letters after the last fullstop, but it doesn't.
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Feb 15, 2012
I am trying to add (Push) whatever the user enters in (MyStack) into 5 different labels that should show the (UserResponse). The problem is I don't know how to display each element in a different label. For example:
- The first element that the user enters (UserResponse) should be in Label1
- The second element that the user enters (UserResponse) should be in Label2 etc.... up to label5.
Also, when I press (Pop) the elements should disappear (Last in first out).
Public Class Form1
Private MyStack As New Stack(4)
Private Sub ButtonPush_Click(sender As System.Object, e As System.EventArgs) Handles ButtonPush.Click
[Code].....
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May 12, 2011
In the context of the CLR in .NET how is stack space allocated and what is it typically limited by? For example: Can any given thread continue to add to the stack until memory runs out? If not; how does the CLR decide how much space to allocate and can it change its mind?
PS: Just to put some context on it this all started from a discussion on how to build a method that will calculate the Fibonacci sequence and one of the suggestions was a recursive function.
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Apr 27, 2011
The following code (calling proc DiskFreeSpace) throws an "unbalanced stack" error message.
Private Declare Function GetDiskFreeSpaceEx Lib "kernel32" Alias "GetDiskFreeSpaceExA" (ByVal lpDirectoryName As String, _
ByVal lpFreeBytesAvailableToCaller As Long, _
ByVal lpTotalNumberOfBytes As Long, _
ByVal lpTotalNumberOfFreeBytes As Long) As Long
[code]....
Additional note: My function does need to work for UNC paths also (local and/or network).
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Mar 24, 2011
I am trying to make a calculator to calculate how many sheets of a product of varying thickness to put into a stack and how many stacks are required to make a whole pack, taking into account that some packs have no cover sheets and some have one at the bottom only and some have top and bottom.
As you can see there are a few variables and to make it harder is the way the stacks are made. No stack can be over 180mm and the last two stacks are halved to make the last two an even height (roughly).
I have a For Next loop and this would be okay if it wasn't for the 2 odd stacks at the end and the cover sheets.
This is what I have anyway.
CB = txtBottomCB.Text
lstDisplay.Items.Clear()
MaxBookHeight = (txtBookHeight.Text)
[Code].....
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Feb 12, 2012
could you tell me, why I get the stack overflow error on this code?
Dim ev As Double = datum.Year * 365 * 24 * 60 * 60
Dim honap As Double = datum.Month * 30 * 24 * 60 * 60
Dim nap As Double = datum.Day * 24 * 60 * 60
Dim masodpercek As Double = ev + honap + nap
The double datatype should be enough.
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Jun 27, 2010
This code worked fine in WinForms under .NET 3.5, but since I've started using WPF and .NET 4.0, it no longer works (although I'm not sure if this is a coincidence or not). The purpose of this is to detect if a mouse button (or multiple mouse buttons) is being pressed outside of the application.[code]...
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Dec 10, 2011
I have created quite a few web chats using VB.NET and ASP.NET and I'm just wondering how Stack Overflow handles messages being sent back to clients. Because web can only make requests and get responses back once, how does Stack Overflow handle messages? In my implementation I have a recursive loop that gets called every 1 second and makes an Ajax request to the server to get the latest messages, but I am thinking of using web services
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Jan 28, 2011
Has anyone found a way to view it numerically?Im sure that for a multithreaded program that a seperate user stack is maintained for each thread?Inevtably. there will be the dunderhead who asks what I am doing. Im in the last stages of developing a multithreaded filescanning program. The program uses a fairly tight loop.
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May 26, 2009
I am using the stack class to store a collection of lines. <code>Dim myStack As New Stack(Of Line)</code> I want to find out what the index is of one of the lines that are in the collection and I'm not sure how to do this. i tried to use array.indexOf:
[Code]...
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Jul 15, 2010
In VB .NET, I know I can get a stack trace by looking at the value of ex.StackTrace when handling an exception. How can I get the functions on the stack when I am not handling an exception? I am looking to implement a logging system of some sort to record the steps the user takes prior to a crash to assist in debugging.
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Apr 2, 2011
I have a recursive function that causes a stackoverflow for big inputs. So I want to enlarge my stack. I have never worked with threads so maybe I'm doing something wrong but when I try to make a new thread, the description for the second argument (StackSize) says that if I use a stacksize bigger than the default one, this argument will be ignored and the default size will be used. How to increase the stacksize? Or how to create a thread with a bigger size than the default one?
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Jul 30, 2010
How can i increasing stack size on my ui thread from within the app?
my app is a paint program + causes a stackoverflow exception when using large bitmaps + redrawing
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Dec 10, 2011
Is there any detailed information if Visual Basic uses a run time stack as well as the format of the activation record the stack, return address, parameters, local variables, etc
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