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Functional Programming in C++

by MehreenTahir

This article will show you an alternative way of using C++; How to write functional code in C++. You’ll see how to write more concise, safer, readable, reasonable code.

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Variadic Delegates

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This tutorial showcases how to implement C++ delegates which are capable of being bound to methods and functions having arbitrary signature, i.e., any number and type of parameters and return value.

Aha, Evaluation Order Matters!

by Eric Z (Jing)

Evaluation order matters!

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Functional Programming in C++

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Graphical BinaryTrees

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A graphical binary tree. Features: add, remove, or search for a node. Recursive algorithm has been used

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All Articles

Recursion

Functional Programming in C++

23 Nov 2018 by MehreenTahir

This article will show you an alternative way of using C++; How to write functional code in C++. You’ll see how to write more concise, safer, readable, reasonable code.

Delaunay Triangulation For Fast Mesh Generation

12 Nov 2012 by HoshiKata

Practical on the fly fast mesh generation from arbitrary points.

Variadic Delegates

13 Apr 2015 by Anton Chibisov

This tutorial showcases how to implement C++ delegates which are capable of being bound to methods and functions having arbitrary signature, i.e., any number and type of parameters and return value.

Combination program in C

24 May 2011 by Sandeep Mewara

oh ___ hell .you don't need me to give lecture on what you are talking about. i dont have time for it.. need help thats why i posted it here its 3.30am here and at 7 i have to present it:doh: Great attitude. You fail to complete your work in time.You come here for help and when someone...

Aha, Evaluation Order Matters!

16 Feb 2015 by Eric Z (Jing)

Evaluation order matters!

ASP.NET TreeView Sort

11 Sep 2011 by brunofer2007

Easy way to sort nodes in a TreeView using a recursive function.

summing numbers recursively C++

27 Jan 2015 by Andreas Gieriet

You may make the example a bit more challenging by employing Divide and conquer algorithms[^].E.g. calculate the sum by calculating the sum of the left "half" plus the sum of the right "half" of your array.int sum(int a[], int size){ int result = 0; if (size == 1) { result =...

When to use recursion instead of iteration?

19 May 2016 by Matt T Heffron

Recursion is rarely the better choice compared with iteration.It might be more understandable in cases of some problems dealing with recursively defined data structures (that are known to be bounded size!).However there are some problems that would be insanely difficult to represent as...

Recursive function never terminates

11 Aug 2016 by OriginalGriff

Development comes in four parts: Design, Code, Test, and Debug.You've done the first three, and now it's time for the fun one: Debugging.Why doesn't it work? I don't know, because you haven't told me how you know it doesn't - you haven't told me what you did in order to test it, or what...

Recursive function overflow

7 Jun 2011 by Ciumac Sergiu

Hi,stack overflow happens when your computer's stack gets too many function calls, thus strings over 150 chars generate such error. There are several workarounds that you can use in order to solve this problem:1) optimize your code to get fewer function calls2) use Stack object in order to...

Findcontrol using a non recursive approach

25 Nov 2011 by Kabwla.Phone

Ha! I get it....I am actually using an adaptation of this technique in production code.But the adapted code required a dept-first search and this original pattern is width-first.Which brings us these new and improved versions:public static List FindControlsWidthFirst( Control...

When to use recursion instead of iteration?

19 May 2016 by CPallini

The oldie-goldie Wirth's book[^] provides excellent insight on this very argument.

Why my merge sort function isn't working in C++?

25 Jun 2022 by steveb

I think you're doing this the hard way. Here is an easier way: std::vector v1 = {1, 2, 3}; std::vector v2 = {4, 5, 6}; std::vector dst; std::merge(v1.begin(), v1.end(), v2.begin(), v2.end(), std::back_inserter(dst));

SQL Server Recursive Fetch From Self Referencing Table

19 Nov 2009 by Anish M

CREATE PROC GetChildNodes (@ID uniqueidentifier)ASBEGINWITH PermissionList (PermissionID, PermissionName, Level)AS(SELECT ap.PermissionID, ap.PermissionName, 0 AS LevelFROM Permission AS apWHERE PermissionID = @IDUNION ALLSELECT ap.PermissionID, ap.PermissionName, Level + 1FROM

Recursive building of an array

1 Nov 2010 by OriginalGriff

Are you absolutely sure?Even if each element of your 7 dimensional array is a single byte, you will need 100 * 50 * 25 * 25 * 50 * 25 * 25 bytes to store it.97,656,250,000 bytes.97GB of RAM, if it is 1 byte per element.I think you need to rethink your project, just a bit!

Disable Child Controls Recursively

13 Nov 2010 by jarvisa

public void ControlStatus(Control control, bool isDisable){ foreach (Control c in control.Controls) if (c.HasControls()) ControlStatus(c, isDisable); else { WebControl wc = c as WebControl; if (wc != null) ...

Output of a Recursion Function

31 Aug 2013 by OriginalGriff

Yes - but the simplest thing to do is try it. Write a simple C function, and call it with your values. See what it does, by following the code execution in the debugger.To answer your supplementary question, "No" - it will not loop forever if you pass it a negative value, because the...

Structs and referencing them into functions

19 Sep 2013 by nv3

As Jochen already mentioned you forgot to put comment characters in front of some of you comment lines.The error in line 28 result from declaring the pointer ptrToPass after an executable statement. Remember, in C all declarations must be at the top of a function!In your numOfSkips...

How is recursion working in the code below?

8 Jul 2014 by OriginalGriff

It's not easy to explain, particularly when I can't see you eyes, and when they start to glaze over...So I won't try.Instead, let's talk about what recursion is.Recursion is the process of using the same code to work out the various parts of a calculation, and is often demonstrated with...

How Do I Fix This Linked List insertion?

22 Nov 2015 by Patrice T

Obviously, your own code is like a blackbox to you. It don't do what you expect.What follow is not directly a solution to your problem, but a key that will help you to understand by yourself what is wrong.The debugger is your friend. It will show you what your code is really doing.Follow...

Implementation of findandreplace function

16 May 2016 by CPallini

Iterative, C++ versionvoid find_and_replace( string & text, const string & word1, const string & word2){ size_t pos = string::npos; size_t len = word1.length(); while ( (pos = text.rfind(word1, pos)) != string::npos ) text.replace( pos, len, word2);}

Treeview - iterate through all nodes, stop at first visible

19 Jul 2018 by Eric Lynch

The following should work: private static TreeNode FindFirstVisible(TreeNodeCollection nodes) { foreach (TreeNode node in nodes) { if (node.IsVisible) return node; TreeNode first = FindFirstVisible(node.Nodes); if (first != null) return first; } return null; }...

How this code generates all the strings of length n drawn from 0...k-1

13 Jun 2019 by Patrice T

Quote: I understand that in the initial step till the base case it assigns 0 to all members of the array, but I don't understand what happens after that. Did you missed that it is a recursive function ? Launch the debugger and watch the code perform, it certainly will help to understand. Your...

Where was I wrong in this recursive solution? There is an iterative dp solution for this but I want to know my mistake here. Anybody please let me know!

1 Jul 2019 by CPallini

As starting point, try #include #include using namespace std; using Matrix = vector >; int maxsum( const Matrix & m, size_t r, size_t c) { if ( c == m[r].size()-1) return m[r][c]; int contrib = maxsum( m,r, c+1); //same row contribution if ( r ==...

Fibonacci function using recursion

6 Jul 2019 by Thomas Daniels

The value is being calculated, but you are not doing anything with it - it's just getting discarded. You might want to print it on the console: print(fibo(6))

How do I print out the sum of all the digits of a given number using a recursive function

4 Feb 2020 by Patrice T

Another way to end the loop is: if n

A recursive method with one parameter prints x asterisks, followed by x exclamation points. Do NOT use any loops. Do NOT use any variables other than x.

12 Aug 2021 by Patrice T

Try char PrintPattern(int n) // function should be void instead of char. { if(n>0) { printf("*"); n--; PrintPattern(n); printf("!"); } if(n!=0) printf("!"); } As KarstenK suggested, try...

Why my merge sort function isn't working in C++?

25 Jun 2022 by Greg Utas

Maybe someone will help with this. But if they do, you won't have to learn how to use a debugger, which is the only reasonable way to find problems in non-trivial code. A debugger lets you step through your code line by line as it executes, so...

Select Recursive Extension method

7 Sep 2010 by John Adams

Magnus, I really like the idea! I believe your original idea (posted @ http://www.codeproject.com/KB/linq/LinqToTree.aspx) is even better for the general case - probably better than the solution in the article - it does feel more generic while still being very easy to use.I'm sure you may...

Problem With Recursive File Searching Code Crashing

13 Sep 2010 by AspDotNetDev

It's obvious that you're using a bunch of memory and you're doing a lot of processing.ListBox1.Items.Add(CurrentFile)With that line, you are saving a file info object for every file in the path specified, and you are adding it to a listbox. That could consume a lot of memory. Also, you may...

Disable Child Controls Recursively

13 Nov 2010 by PSU Steve

You can just use "not IsDisable" versus the IF...ELSE block. Additionally, the recursive call to ControlStatus should be done all the time so that the parent control is enabled/disabled along with the children. // to enable\disable the control & its child controls public...

Average depth of Binary search tree

23 Apr 2011 by Sergey Alexandrovich Kryukov

The problem is not finding the depth, the problem is to do it just once. Here is the way to do it: do not create a function for finding a depth of the current node. Instead, include the depth of a current node as a parameter of the recursive function.void AccumulateNodeInfo( node *...

How do i bind the data to menu or treeview?

18 May 2011 by Programm3r

Hi new guy,Please have a look at the following post: Building a Database Driven Hierarchical Menu using ASP.NET 2.0[^]Kind regards,

C# Need a Recursive Function for Analyzing % of Total and % of Parent at Branch Level

22 Jun 2011 by OriginalGriff

It's pretty simple: the runningTotal is passed to the routine by value, not buy reference. So when you make changes to it, they are not reflected back up the tree.For example:void Change (int i) { Console.WriteLine(i); if (i

Query Cascade records from sql server

21 Jun 2013 by Rajesh Anuhya

Here is the direct example for self joinhttp://www.aspdotnet-suresh.com/2012/07/self-join-query-in-sql-server-self-join.html[^]Thanks--RA

Output of a Recursion Function

1 Sep 2013 by Stefan_Lang

Probably 9 is right. But the question is not:1. The first line of the code is not C code - I assume it's part of the textual description or just defines the input.2. You did not (formally) provide the definition of function f - I assume the last 4 lines of the code describe it. (and I'll...

How recursive algorithm work in this case? And what type of recursion is ?

11 Sep 2013 by Sergey Alexandrovich Kryukov

Please see the comments to the question.Please see:http://en.wikipedia.org/wiki/Recursion[^],http://en.wikipedia.org/wiki/Recursion_%28computer_science%29[^],http://en.wikipedia.org/wiki/Stack_%28abstract_data_type%29[^] (this is not what is used in recursion, but good to know,...

Recursion in Stored Procedures

27 Nov 2013 by Snehasish_Nandy

Check thisRecursion in T–SQL[^]

stored-procedure

Trying to understand recursion better

4 Feb 2014 by CoderPanda

First of all, thanks for asking an intellectual question. Don't get to see these often and I, personally, absolutely love to talk about these. I would like you to understand it yourself and I am sure you can. I will only explain the code a bit more to help you out.(Assuming you know what a...

Trying to understand recursion better

4 Feb 2014 by Mattias Högström

Yes. Recursion can simplify a solution quite a lot.But reading it may be problematic.You are trying to understand 2 problems at the same time.1. How the recursion works.The easiest form of recursion is calling the same function from just one place in the code.Like calculating the...

Naive Approach to Recursive MySQL

12 Nov 2015 by Veselin Tenev

Provides simplistic solution to a recursive MySQL table

How Do I Fix This Linked List insertion?

27 Nov 2015 by mbue

cur->prev = p; if(cur->prev != NULL) it is strongly recommended to use human readable names - so you can see 'cur' is 'p' now. if(p->prev != NULL) p->prev->next = p;regards.

I have written this code in C++ to print nth prime number. How can I write this code through recursion?

7 May 2016 by Patrice T

Bug report: On first look I would say that your program fail to find the first prime.Question: why do you want to use recursion to find if a number is prime ?Ok it may simplify the code, but it is at expense of PC resources, for large numbers you are at rick of stack overflow.If you...

How to write a recursive class accessory ? ( to print my linked list in recursive order)

11 Jun 2016 by OriginalGriff

To do it recursively in the "Class method" is the same as to do it in the non-class method - all you have to do is pass the node to print in:void revPrint(node* pn) { if (pn != NULL) { revPrint(pn->next); count data

Flattening the Recursive Call in the Canny Edge Detector Algorithm

15 Sep 2016 by discompsys

This tutorial describes how to convert the recursive method call in said algorithm into a flat loop call, to save memory in restricted environments.

Recursive binary search in C

5 Jun 2017 by Patrice T

Quote: My function does not work This is not informative. An example of function calling woukd be also helpful. There is numerous problems in your code: binsearch(arr, low, size/2, p); binsearch(arr+mid, mid+1, size/2, p); Depending on the size of arr being odd or even, your code fails on...

Recursive binary search in C

6 Jun 2017 by Klaus-Werner Konrad

You don't RETURN a pointer from your recursive binsearch() calls ...

(Java) problem with recursion algorithm - square roots

4 Nov 2017 by Kenneth Haugland

You need to do something like this: double sqrt(double S, double x, double n) { if (n == 0) return x; else return sqrt(S,0.5*(x+S/x), n - 1); } S will never change since its the number you want...

Recursive boolean method C# (zkempeerer.dll)

12 Feb 2018 by OriginalGriff

There is no recursion in that code, nor is there a loop. There may be recursion or iteration within the CZKEM class, but we can't see it if there is. You do understand that recursion is calling a method (directly or indirectly) from itself, don't you? public int factorial(int x) { if (x...

What does this problem ask of me?

15 Apr 2018 by OriginalGriff

It's pretty clear if you just read it. Quote: Write a function plot that will plot the values calculated by another function with rows of asterisks, each asterisk corresponding to the value 0.1. So 1 will be shown with a line of 10 asterisks, 0.5 with a row of 5 asterisks, 2 with a row of 20...

What does this problem ask of me?

16 Apr 2018 by Patrice T

Not a solution, just advices. Quote: I've been pulling my hair trying to understand this teacher's horrible directions. There is nothing horrible in this requirement, just may be a little more complicated than usual. In fact this requirement is nowhere as complicated as real life requirements....

How does this recursive function work?

15 Aug 2018 by OriginalGriff

Recursion is simple to understand: see "recursion" and it'll all be clear! Your function calls itself with different parameters, and return to itself with the value each time when it's calculated. Look at what happens with your code when you pass specific values: a == 2, b == 3 1) 2, 3 : b...

Sum of all child and parent in hierarchical data

30 Sep 2018 by maysamfth

hi I have 2 table for sale with below fields: saleDetail (id, commodityID, count, price, ...) commodity (id, parentID, name) commodity table is hierarchical or recursive. There are my test data commodity id-- parentID-- name 1-- null-- foods 2-- 1-- ...

Sum of all child and parent in hierarchical data

30 Sep 2018 by Maciej Los

Check this: DECLARE @commodity TABLE(id INT IDENTITY(1,1), parentID INT, [name] VARCHAR(30)) INSERT INTO @commodity(parentID, [name]) VALUES(null, 'foods'), (1, 'fruits'), (2, 'apple'), (2, 'orange'), (2, 'melon'), (1, 'sea foods'), (6, 'salmon'), (6, 'shrimp') DECLARE @saleDetail...

C program that combines arrays and recursion

15 Nov 2018 by CHill60

We do not do your homework for you. Exercises like homework are set to cement the knowledge from the course into your brain, to help you practice the new skills and to let your tutor know where you need extra help. Give it a go. It is not as hard as you think. Then, if you are still stuck, come...

I have the code for the josephus problem using recursion but I don't quite understand it can some one explain to me

17 Nov 2018 by OriginalGriff

What's to explain? Either you understand recursion, or you need to learn it. To learn recursion is simple to do: just learn recursion. The winner method is called with a specific value for n. If it isn't one (i.e. the winning position) it calls itself with n minus one, and uses the result from...

Find the number of descendant nodes in a SQL query

25 Apr 2019 by User 11060979

In case you can use CTE, then based on this: sql server - Counting number of children in hierarchical SQL data - Stack Overflow[^] The SQL lokks like ;WITH ChildrenCTE AS ( SELECT RootID = ID, ID FROM Tbl1 UNION ALL SELECT cte.RootID, d.ID FROM ChildrenCTE cte ...

The question is to generate all the passwords from the given characters' set or array! Anyone just let me know where did I go wrong?

18 Jun 2019 by CPallini

A give you a sample code which incidentally (?!) could be used as a building block for your program: #include #include using namespace std; void produce(const vector & v, string s, size_t index) { if ( index == v.size() ) { cout

Want a little explanation on recursion

5 Jul 2019 by OriginalGriff

Calling a function within itself is simple. Think of the classic example: factorials. n! is n * (n-1) * (n-2) * (n-3) until the terms reach 1. E.g.: 4! = 4 * 3 * 2 * 1 6! = 6 * 5 * 4 * 3 * 2 * 1 In C# code (I refuse to write Python, it's a toy language)int Factorial(int n) { if (n

Want a little explanation on recursion

6 Jul 2019 by jsc42

Part of your problem may be that the 'concepts' you state have a slight flaw … 4. Each invocation that does correspond to the base case must call itself with parameter(s) that move the execution closer to the base case. The function’s recursive execution must converge to the base case. should...

How do I print out the sum of all the digits of a given number using a recursive function

4 Feb 2020 by CPallini

Hint: at each step, you may use the modulo operator (e.g. n % 10 ) to get the last digit of the number (stop if it is 0) and add it to the sum. Then call the next step passing ( n // 10 ).

How to Load and Display Hierarchical Structured Comments

19 Jul 2020 by Han Bo Sun

This tutorial will show you how to load and display hierarchical structured comments using RESTFul service and JavaScript.

C++ how to read file and reverse a linked list using recursion then output

18 Sep 2020 by Patrice T

Quote: my code cannot successfully read the file and use reverse the Linked List. As far as I can see your code reads input file and do nothing with it. while(fin) { string line; getline(fin, line); } Your code do not behave the...

Why is my recursive method only getting one item from each level?

13 Feb 2021 by Luc Pattyn

How many iterations of this loop foreach (Taxon t in children) { taxnav.Add(rootitem.UrlName.ToString(), t); return GetAllTaxonomyChildren(t.Name, taxnav); ...

How to get intuition for a specific DP problem

13 Jun 2021 by Patrice T

Quote: How to get intuition for a specific DP problem Probably the same way as one guess winning numbers of LOTTO. There is no intuition in finding solution to a problem, there is only experience. If a new problem is equivalent to a previously...

How to solve N-queens M-rooks problem on an (M+N)×(M+N) chessboard

8 Sep 2021 by Patrice T

Quote: I test my code on visual studio, it works when N=0, but if N>0, the result will be greater than the correct answer. I think it might be because placeQ calls placeR too many times or something wrong with vaildQ. Stop guessing, make sure...

How to do this function recursively?

23 Feb 2022 by Richard MacCutchan

Try this: for key, value in group.items(): if value in group and group[value] != "None": group[key] = group[value] print(group)

Python, how an instruction can be done eventhough the recursion shouldn't allow it?

13 Apr 2022 by CPallini

consider the simple case of the print_triangle(1) call print_triangle(1): if 1

Why my merge sort function isn't working in C++?

25 Jun 2022 by OriginalGriff

Compiling does not mean your code is right! :laugh: Think of the development process as writing an email: compiling successfully means that you wrote the email in the right language - English, rather than German for example - not that the email...

Why my merge sort function isn't working in C++?

25 Jun 2022 by Patrice T

First of all, your code can't be run as is, part is missing. We have to make guesses to have complete code, and this is not good for debugging. I would change the main to : int main(){ int size=7; // cin >> size; // int* array = new...

My code is not getting accepted ('infectious letters' on codeforces)

31 Aug 2022 by CPallini

Quote: while(s[j+1]!='b' && j

What is the use of prime(n, n/2) here. If I dont use it it doesn't print the output

28 Oct 2022 by OriginalGriff

n/2 provides the starting point for the prime check. If you think about it, n cannot be divisible by any number larger than n/2 as 2 is the smallest divisor that allows a zero remainder. If you want to see is 11 is prime, then 11 / 2 is 5...

What is the use of prime(n, n/2) here. If I dont use it it doesn't print the output

28 Oct 2022 by merano99

The subroutine should actually have a return value and should not output anything itself, so that the main program makes sense. Currently your code looks like this: int prime(int n, int i) { if(i == 1) printf("Yes"); else { ...

How to use recursion to get the minimum values to create connections between keys in Python?

4 Jul 2023 by CIZA_1

I am trying to find intermediary activities between keys. There is different connectors between two keys and I want to find the ones which have minimum value due to a calculation which I will explain below. I have dictionaries such as dict2 =...

How to use recursion to get the minimum values to create connections between keys in Python?

4 Jul 2023 by Andre Oosthuizen

I might be a little out of my depth here as Python is still an ongoing learning curve for me. From what I could gather, it looks like the logic to handle a case where there are multiple possible paths between two keys is missing. You need to...

Does some have an Idea for the use of Threading in Recursive functions

31 Dec 2009 by dexit2k

Hi Guys!Thx for reding!My Situation:i use VB.NET 3.5, VS2008i have got an tree of data. i got the data via an app api call.about: 300MB, 1100 Nodes. max tree deep of 6my single thread func:Private Function IterateThruTree(ByVal AktComponet As Component, ByVal AktDeep As...

Does some have an Idea for the use of Threading in Recursive functions

31 Dec 2009 by AspDotNetDev

Well, you could store a count of threads at the class level. Whenever a new thread is created, add to the count. When the thread is complete, remove from the count. When the maximum count is reached, wait for it to be reduced before starting a new thread. You would likely do this check to make...

Does some have an Idea for the use of Threading in Recursive functions

1 Jan 2010 by dexit2k

aspdotnetdev wrote:So, if the threads are at max, then just recursively call IterateThruTree. But if the threads are less than max, then call IterateThruTree as a new thread.Thats an realy good idea, thx.

Does some have an Idea for the use of Threading in Recursive functions

1 Jan 2010 by N a v a n e e t h

wrote:i wonne do this in threads.I will not recommend to use multi threading just to iterate over the tree. It will make the code complex and it is very tough to maintain the order of iteration. Do the iteration on single thread and spawn new threads for processing.

Does some have an Idea for the use of Threading in Recursive functions

1 Jan 2010 by dexit2k

wrote:I will not recommend to use multi threading just to iterate over the tree. It will make the code complex and it is very tough to maintain the order of iteration. Do the iteration on single thread and spawn new threads for processing.its the iteration what costs the cpu time, not...

Using LINQ to compare a string value with an object recursive list

10 Jun 2010 by rpg1503_2010

Hi guys,I have a query called permissions which contains an object list that I extracted from a XML file.Find below an example of the xml structure: ...

Using LINQ to compare a string value with an object recursive list

11 Jun 2010 by Hristo-Bojilov

There's very similar issue right here.You could follow thread suggestions for your problem too.

Problem With Recursive File Searching Code Crashing

13 Sep 2010 by TheRadish

HiI am writing a simple programme to search recursively through a hard drive and return a list of all present files. I am using this in a simple Anti-Virus application. I have written the following function for searching through the files and adding them to a list box:'The following...

C#, Recursive loops?

29 Sep 2010 by borgasia

I found a normal loop to do so!private void setPos() { recBom Bom; int position = 0; for (int level = 1; level

Automatic build of a treeview

28 Oct 2010 by SuperAdministrator

Hello,I am trying to automatically build a tree view by giving it the following values.number of levels :Nlevelsnumber of children in each level: NchildrenAtEachLevelIs this doable?Any help would be highly appreciated.

Automatic build of a treeview

28 Oct 2010 by Pawan Kiran

Equal No of Childs For Each Parent NodePrivate Void FillTreeView(Treeview Tv,int NoofParents,int NoofChilds){ for(int i=0;i

Automatic build of a treeview

28 Oct 2010 by qontary

Try this. I modify the code posted by Mr. Pawan Kiran.private void FillTreeView(TreeView Tv, int NoOfLevels, int NoOfChildsOfEachLevel) { if (NoOfLevels

Recursive building of an array

1 Nov 2010 by SuperAdministrator

This builds an array of the form ex: {1,2,2}dictKeys.Length=3dictKeys[] = [100,50,25]The dictKeys represents box capacities the NumberOfSubBoxes array ({1,2,2}) indicates that a 100 box has 2 x 50 boxes and each having 2 x 25 boxes.The question is : I want to build another array of...

Disable Child Controls Recursively

13 Nov 2010 by a_pess

Alternative For VB.NET Windows Forms Private Sub ControlEnabled(ByVal ctrl As Control, ByVal isDisable As Boolean) Me.ControlEnabled(ctrl, isDisable, True) End Sub Private Sub ControlEnabled(ByVal ctrl As Control, ByVal isDisable As Boolean, ByVal allowRecurse As...

Software Learning ~ How do I teach software to read?

11 Feb 2011 by klixxx

After searching google for a different term, I realize it's called OCR.Does anyone have experience in using it?http://en.wikipedia.org/wiki/Optical_character_recognition#OCR_software[^]Edit: Just found it!Creating Optical Character Recognition (OCR) applications using Neural Networks[^]

Software Learning ~ How do I teach software to read?

11 Feb 2011 by Manfred Rudolf Bihy

You may want to checkout this site: Open Source OCR Libraries[^]. They are linking to some open source OCR libraries.Cheers!

interop.camserverlib.dll was loaded,but the dllregisterserver entrypoint was not found

20 Feb 2011 by fahad munawar

where did you downloaded the this dll i need it !

Average depth of Binary search tree

24 Apr 2011 by mbue

For every thing i do with trees i use walk functions.Example for a walk function:class INode{public: INode* _child; INode* _next;};class IWalk{public: // IWalk virtual HRESULT Enter(INode* pNode) = 0; virtual HRESULT Leave(INode* pNode) = 0;};void...

NHibernate recursive query using linq

19 May 2011 by Tsateran

Hello.Let'...

NHibernate recursive query using linq

22 May 2011 by kornakar

You should map a list of children to a menu item class. That way each instance of a menu item also contains its children and you can easily iterate them. All you have to do is to select menu items where ParentId=0.MenuItem-class:[Bag(0, Name = "Children", Inverse = true, Lazy =...

Building a Sudoku Solver in F#

3 Jun 2011 by Cyborgx37

A simple F# application that solves Sudoku puzzles. Links to helpful resources are also provided.

Recursive function overflow

7 Jun 2011 by MJ_

Hey, I built a working recursive function that finds the Longest Common Sequence between two strings. http://en.wikipedia.org/wiki/Longest_common_subsequence_problem[^]It works perfectly fine and it is fast cause I use a memiozation table so that I'm not calling something that I've...

Final Balance Calculation with CTE

4 Oct 2011 by imrankasuri

Hi All, i am currently facing an issue and hope that someone will help me.here is the scenario.I have a simple table.Member Table================Member_id Name Opening_Balance Balance_Type1 David 5000 DebitTransaction...

Final Balance Calculation with CTE

4 Oct 2011 by André Kraak

Have a look at this article Calculating Running Totals[^] and see if you can use it to get your running total working.

Findcontrol using a non recursive approach

8 Nov 2011 by Kabwla.Phone

Implemented with a queue and some newfangled yields.Since a queue does not have an 'EnqueueRange', we will still have to do a loop. Of course, enqueue range would be a nice extension method.Excusing the overhead created by the yield, this might use less memory if there are many controls. (Or...