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Great Reads

Proper List Support in C#

by honey the codewitch

Implementing full list support over custom data structures in .NET

Maths in IT #2: Venn diagrams

by Sander Rossel

Using Venn diagrams to visualize sets.

LookAheadEnumerator: Implement Backtracking in Your Parsers

by honey the codewitch

Easily implement efficient backtracking capabilities over any enumeration

How to Create a WCF WebService in VB.NET

by Rene Bustos

WCF WebService IN VB.NET Response JSON

Latest Articles

B-Tree Sorted Dictionary

by Gerardo Recinto

In-memory B-Tree sorted dictionary

Batch Processing with Directory.EnumerateFiles

by Bohdan Stupak

Batching is a nice technique that allows you to handle big amounts of data gracefully. Directory.EnumerateFiles is the API that allows you to organize batch processing for the directory with a large number of files.

Iterator Benchmarks that Shocked with Unexpected Results

by Dev Leader

This article is follow up content to previous articles I've written about iterators and collections, but the benchmark results were NOT what I expected!

A Generic Form of the NameValueCollection

by Pavel Bashkardin

Represents a C# generic implementation of the NameValueCollection

All Articles

Collections

How can I detect if my observation collection changed in VB.NET ?

19 Mar 2024 by Graeme_Grant

I am not sure what you are trying to do however I'll show you how to handle each item in the ObservableCollection. The Item class needs to implement the INotifyPropertyChanged Interface (System.ComponentModel)[^]. Microsoft provide a sample: How...

How can I detect if my observation collection changed in VB.NET ?

17 Mar 2024 by Pete O'Hanlon

You cannot tell if an object has been changed using an ObservableCollection. The way to do this is to use INotifyPropertyChanged and raise the PropertyChanged event whenever you change the value in a property.

How can I detect if my observation collection changed in VB.NET ?

17 Mar 2024 by Sh.H.

Hi folks. I have an Observation Collection. I used event CollectionChanged. But this event only raises when new item added, or an item deleted. So how can I detect if an item edited? (And ofcourse, it would better also to detect which item got...

Binding not working when custom control is used in a datagridtemplatecolumn

12 Mar 2024 by hardover

With guidance from others, I have solved the problem. The key was to use the PropertyChangedCallBack to manage when the SelectTags List was bound. In summary, the solution involves capturing the point at which the actual List binding takes...

custom-controls

Binding not working when custom control is used in a datagridtemplatecolumn

6 Mar 2024 by Graeme_Grant

List is not a bindable collection. You need to use the ObservableCollection Class (System.Collections.ObjectModel) | Microsoft Learn[^]. Here is a working solution for a similar question. Create a new project and add this code: 1. Classes: ...

custom-controls

Binding not working when custom control is used in a datagridtemplatecolumn

6 Mar 2024 by hardover

Binding not working when Custom Control is used in a DataGridTemplateColumn My charge is to provide a control that can be used to select multiple items from a list of items. The items are classification tags. The object is a Tag. It has three...

custom-controls

B-Tree Sorted Dictionary

26 Jan 2024 by Gerardo Recinto

In-memory B-Tree sorted dictionary

Batch Processing with Directory.EnumerateFiles

12 Aug 2023 by Bohdan Stupak

Batching is a nice technique that allows you to handle big amounts of data gracefully. Directory.EnumerateFiles is the API that allows you to organize batch processing for the directory with a large number of files.

Comparing two collections

19 Jul 2023 by FuFu Dev's

I have a two models (Current and Original) that have the same properties. I want to build in a validation to check if one of the properties (Address - which is a collection consisting of "Country, City, Suburb, Code") have the same values or they...

Comparing two collections

19 Jul 2023 by PIEBALDconsult

If you have access to the code for the Address class, you can add the ability for them to compare themselves. The following is a very naïve example. Comparing addresses is a very complex topic with many pitfalls. public partial class Address...

Code module returning "unhashable type: list" error when sending result through fast API

3 Apr 2023 by Richard MacCutchan

You need to look at the actual values that are being passed in to the following lines. if not result: result[operation] = [(tuple(unique_value_freq_input), result12)] else: result[operation].append((tuple(unique_value_freq_input),...

Code module returning "unhashable type: list" error when sending result through fast API

3 Apr 2023 by Apoorva 2022

I've written a python code to check the unique values of the specified column names from a pandas dataframe. What I have tried: Main Code: Checking the unique values & the frequency of their occurence def uniq_fun(df, col_name): try: ...

Iterator Benchmarks that Shocked with Unexpected Results

17 Mar 2023 by Dev Leader

This article is follow up content to previous articles I've written about iterators and collections, but the benchmark results were NOT what I expected!

Wpf: how do I display a collection in a datagrid, where the collection also contains another collection

13 Feb 2023 by Grant Mc

Hi. Lets say I have a collection called Orders, and one of the members in the collection, is another collection called Products. So if I have an order, say ID = 001, and it has two different products, I would like to show this on a DataGrid,...

Wpf: how do I display a collection in a datagrid, where the collection also contains another collection

13 Feb 2023 by Grant Mc

OK, still working through this, but here is what I have so far. public partial class MainWindow : Window { MovieCollectionViewModel movieCollection; ObservableCollection actors; public MainWindow() { ...

Wpf: how do I display a collection in a datagrid, where the collection also contains another collection

12 Feb 2023 by Graeme_Grant

This link will show you how: DataGrid with row details - The complete WPF tutorial[^] Here is a little demo with Order > Product grouped data structure: public partial class MainWindow : Window { public MainWindow() { ...

Print out the company, date and average stock price on that date

17 Jun 2022 by Member 13102977

String[] stockPrice = { "Reliance", "2022-01-01 10:00", "100", "Reliance", "2022-01-01 10:34", "110", "Tata", "2022-01-01 10:30", "500", "Reliance", "2022-03-02 10:15", "120", "Tata", "2022-01-01 12:00", "400"...

Print out the company, date and average stock price on that date

10 Jun 2022 by Richard MacCutchan

You should make it into a multi-dimensional array like: String[][] stockPrice = { { "Reliance", "2022-01-01 10:00", "100" }, { "Reliance", "2022-01-01 10:34", "110" }, { "Tata", "2022-01-01 10:30", "500" }, { "Reliance",...

A Generic Form of the NameValueCollection

7 Feb 2022 by Pavel Bashkardin

Represents a C# generic implementation of the NameValueCollection

How do I declaratively initialise a C# nested collection?

1 Feb 2022 by Patrick Skelton

In C#, I thought the rule was that any collection with an Add() function could participate in declarative initialisation? I have two such collections that are nested one inside the other. Is there a way to declaratively initialise it, rather than...

How do I declaratively initialise a C# nested collection?

31 Jan 2022 by Patrick Skelton

This is perhaps as close as I am going to get: private static Dictionary _dataStructure = new Dictionary { [ "One" ] = new MyDataPlot { { 2, 6 }, { 7, 4 } }, [ "Two" ] = new MyDataPlot { { 5, 16...

How do I declaratively initialise a C# nested collection?

31 Jan 2022 by Richard Deeming

A collection initializer can work with multiple parameters - for example: private static Dictionary _dataStructure = new() { ["Foo"] = new MyDataPlot { { 0, 1 }, { 2, 3 }, { 4, 5 }, }, }; ...

How do I declaratively initialise a C# nested collection?

31 Jan 2022 by OriginalGriff

Because Add is a void method, you can't use it directly in an initializer. Change it to return the MyDataPlot instance, and it works: public class MyDataPoint { public MyDataPoint(int x, int y) { X = x; Y = y; } public...

List<bool> doesn't update the values .net5.0

14 Jan 2022 by Electro_Attacks

I've written a custom ToolTip Class, that has multiple Settings which were contained in a seperate class called ToolTipInfo. I've managed to make them all Displayed in the Designer and all value changes were saved, except of my Collection...

List<bool> doesn't update the values .net5.0

14 Jan 2022 by Electro_Attacks

Ok guys, I've managed to get my code working, somehow... It's not tested completely, but it looks promising to me :) If you find any errors doing testing, or any suggestions how I can improve my code, let me know... You might need to comment...

How do I make locale correct

15 Dec 2021 by Member 15463307

Hi, how can I make Locale output that the language of the passport is Russian, and for each element in the array list, to call the method isRussian(); public class Passport implements Comparable{ private String firstName; ��...

How do I make locale correct

15 Dec 2021 by Richard MacCutchan

See Locale (Java Platform SE 8 )[^]

Print from one array list to another, but only certain things

15 Dec 2021 by Member 15462808

Hello, How can i create a new array list "onlyRF", and here to print only the books with genre Romance and Fiction, from the array list "books"? List books = new ArrayList(); //from this i have to print in new one, only the book...

Print from one array list to another, but only certain things

15 Dec 2021 by Richard MacCutchan

List onlyRF = new ArrayList(); // this is the one where only the Romance and Fiction book will be for (Book b:books) { // if Romance or Fiction, add to onlyRF list if(b.getBookGenre().equals(LiteratureGenre.Romance) ||...

SetComparers: A variety of comparers for collections of objects in C#

23 Nov 2021 by honey the codewitch

Easily compare collections for equality

Use values of one map as keys to get the values from a list of maps

3 Nov 2021 by Vishal Ekkaldevi

I have a requirement where a map contains values which were the keys of other maps. Like below example Map keysMap = new HashMap(); one.put("Car","4 Wheeler"); one.put("Bike","2 Wheeler"); Map m1 =new...

Wpf: adding new row to datagrid, but there's no default value

31 Aug 2021 by Flidrip

My DataGrid is bound to an ObservableCollection in my ViewModel. I add new rows via a command that looks like this: public void AddItem() { MyObservableCollection.Add(new MyClass()); } How can I set default value for a...

Wpf: adding new row to datagrid, but there's no default value

31 Aug 2021 by Richard Deeming

Set the properties on the new instance of your class to the appropriate default values: MyObservableCollection.Add(new MyClass { PropertyName1 = "Default value for property 1", ... });

Metaprogramming in C++: A Gentle Introduction

23 Mar 2021 by honey the codewitch

Make your code more efficient by hacking your compiler to improve its optimization capabilities

A Few Words About ConcurrentHashMap, compute() Method

28 Jul 2020 by rtybase

There is one ambiguous moment in the Java documentation of the compute() method from the ConcurrentHashMap class.

Entityframework persisting multiple records

24 Jun 2020 by Dave Kreskowiak

Couldn't tell you what you're missing. There's nothing that stands out as wrong with the code you posted. EF is writing 125 records because your code is giving it 125 objects to write. You're going to have to step through the code,...

Entityframework persisting multiple records

24 Jun 2020 by Tshumore

I have a utility that reads the status of MicrosoftBizTalk Server resources .. specifically the ReceiveLocation component. My problem is that the program is submitting multiple entries of each item i.e each item in the data returned is being...

How to Get a Collection Element Type Using Reflection in C#

5 May 2020 by honey the codewitch

This tip shows you a robust way to get the type of items a collection can hold. It works with non-generic collections too.

How can implement a hash table with using only primitive data types in C#

26 Apr 2020 by OriginalGriff

Google is your friend: Be nice and visit him often. He can answer questions a lot more quickly than posting them here... A very quick search using your subject as the search term gave over 2 million hits: implement a hash table using only...

Efficiently Using Lists as Dictionary Keys in C#

24 Feb 2020 by honey the codewitch

A relatively safe, simple, yet high performance technique for using lists as dictionary keys.

Using Collections as Keys in C#

9 Feb 2020 by honey the codewitch

Using IEqualityComparer to allow collections to be keys in dictionaries and hashsets

A Generic Circular Buffer in C#

6 Feb 2020 by honey the codewitch

A circular buffer implementing IList

LookAheadEnumerator: Implement Backtracking in Your Parsers

23 Dec 2019 by honey the codewitch

Easily implement efficient backtracking capabilities over any enumeration

IndexedQueue<T> - A Custom Queue in C#

5 Dec 2019 by honey the codewitch

Fills a gap in Microsoft's Queue offering with an alternative allowing efficient indexed access

A Generic OrderedDictionary in C#

20 Nov 2019 by honey the codewitch

A fully generic ordered dictionary class in C#

Proper List Support in C#

17 Nov 2019 by honey the codewitch

Implementing full list support over custom data structures in .NET

Bee: A Suite of Self-Balancing Binary Tree Based Dictionaries

13 Sep 2019 by honey the codewitch

A B-tree, an AVL tree, and a Splay tree in C#

Java FX Foreground/Background Messaging

17 Jul 2019 by ireland94

This program demonstrates the methodology needed for by directional messaging between a Java FX foreground and 1 or more background threads.

multi-threading

I have used following logic for the following code.plz help me correct this code

10 Jun 2019 by Member 14492636

Given an integer array of size N. For each element in the array, check whether there exist a smaller element on the next immediate position of the array. If such an element exists, print that element. If there is no smaller element on the immediate next to the element then print -1. What I have...

I have used following logic for the following code.plz help me correct this code

10 Jun 2019 by CPallini

Try: import java.util.*; import java.lang.*; import java.io.*; class GFG { public static void main (String[] args) { Scanner sc = new Scanner(System.in); int t=sc.nextInt(); List list = new ArrayList(); while(t-- > 0) { list.add(sc.nextInt()); ...

Guid should contain 32 digits with 4 dashes (xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx). error?

12 May 2019 by Member 12087373

I need to save those six fields in same column but not in same row and same cell. each field have default GUID.so i decided to put that default guid's in one list and fields in one list and call that object of that particular list where we want .ArrayList Alist = new ArrayList(); ...

Persist collection at designtime

21 Feb 2019 by Ralf Meier

I modified your (for me relevant) Code a little bit to make it work. I think that will help you : Imports System.Windows.Forms.Design Imports System.ComponentModel Public Class CustomerComponent Inherits Component ...

Persist collection at designtime

21 Feb 2019 by Gdno

Hello, Im creating a component that I call CustomerComponent, this component has only one property called Customers that receives a collection from my Customer class. Im trying to create a Form to edit this collection at design time through UITypeEditor. However, the values added at design...

Concat() is not working in C#

19 Feb 2019 by Member 13974276

Everything was fine. I had to use AddRange() instead of Concat() obj.AddRange(ob);

Concat() is not working in C#

19 Feb 2019 by Member 13974276

I have created an object of type List and I am concatinating another collection of type IEnumerable into it but the the object always showed zero record while debugging. When I debugged, the Count for obj was zero obj = 0 Where have I gone wrong? Or is there another way to do it? I even tried...

Concat() is not working in C#

19 Feb 2019 by OriginalGriff

Assuming you can get that to compile - it won't as shown - start with the debugger: put a breakpoint on the line var obj = new List(); and look at the content of param to find out how many objects it contains. At a guess, none. No objects, no foreach body execution, no objects added...

Can I add a helper overload to a collection?

8 Jan 2019 by Simmerliner

I've defined a class like this: class TextEnhancement ... public TextEnhancement(int offset, int length) { ... } And then I've defined a collection that uses this type as: public List mTextEnhancements; Normally I'd then add an element to this collection thus:...

Can I add a helper overload to a collection?

8 Jan 2019 by Simmerliner

Excellent! Thanks David. That makes total sense.

Can I add a helper overload to a collection?

8 Jan 2019 by Dave Kreskowiak

Create your own collection type, inheriting from Collection: public class TextEnhancementCollection { public void Add(int offset, int length) { Add(new TextEnhancement(offset, length); } } Create your collection instead of using List: ...

How to send array to button in HTML page

30 Dec 2018 by Bryian Tan

Not clear how the selectedIDs is being generated. I think the following save(['']) should work if selectedIDs = '1','2','3' A quick work around, in the save function, use the split() function to split the selectedIDs into array object String.prototype.split() | MDN[^]

How to send array to button in HTML page

30 Dec 2018 by Member 13974276

I am selecting some checkboxes and then sending the ID of those checkboxes to a button in a HTML page After selecting the checkboxes the IDs are stored in an object selectedIDs. This object is passed to the button. When I debugged and checked, the object received the IDs as I want i.e....

Getting min and max from an array or list <keyvaluepair>

26 Dec 2018 by Jatinath

List> totals = new List>() { new KeyValuePair("Key1", 10), new KeyValuePair("Key2", 15), new KeyValuePair("Key3",...

Getting min and max from an array or list <keyvaluepair>

26 Dec 2018 by Jatinath

Hi, just update below code. cheking for non zero value here. [from line num 18 in previouse code] List> totals = new List>() { new KeyValuePair("Key1", 10), ...

Getting min and max from an array or list <keyvaluepair>

26 Dec 2018 by TheBigBearNow

I have a multidimensional array with basically a key / value pair. I would like to sum all the values according to the key then pick the min and max values from this. I tried making a List and a dictionary to do this I got very close but it wouldn’t let me sort through a list of...

Adding existing items to collection editor

27 Sep 2018 by Gdno

Please see if this helps you in some way, see that in the "TargetControls" property of the control that is in form1 you can select the controls of the same type, to appear all the controls is just to change the control code, where is ExampleControl you changes to Control. Link to demo:...

custom-controls

Adding existing items to collection editor

27 Sep 2018 by teolazza

I, I've created a component with a collection of controls as property:[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)] public List ControlsToNotTranslateThen I've created an UserControl, added some controls to it: buttons and labels.Now I...

custom-controls

Get count of items in a list of double that sum closest to 1 wiithout going over

12 Jul 2018 by Gerry Schmitz

Effective wooden board cutting algorithm - Stack Overflow[^]

Get count of items in a list of double that sum closest to 1 wiithout going over

12 Jul 2018 by theskiguy

I have a list of double that contains percentages (numbers from 0 to 1). These numbers equate to the percentage of a parent piece of material required to make part. I am trying to get the total material required but I can’t just add all these numbers up because it doesn’t account for any...

Custom listview is drawing item in subitems column

9 Jul 2018 by User 8406082

Issue: The `VisualListViewItem` text draws in the first `VisualListViewSubItem` text position also when using the designer. ---------- Image: [Design](https://i.stack.imgur.com/st9z1.jpg) [Debug](https://i.stack.imgur.com/gBHka.jpg) ---------- Steps to reproduce: 1. Add `VisuaListViewEx`...

Iteration Over Java Collections with High Performance

6 Jul 2018 by vudangngoc

Travelling over Java collections is just a piece of cake, but when the size of the collections increases you have to choose wisely

A Lazy Stream Implementation in C++11

25 Jun 2018 by David Serrano Martínez

A lazy stream has been implemented in C++11, so as to highlight the functional capabilities of this new specification

Java.lang.numberformatesception: for input string: ""

3 May 2018 by four systems

Hello, The code for buffered reader that reads numbers from file and sorts them is: package inout; import java.io.BufferedReader; import java.io.FileReader; import java.io.IOException; import java.util.ArrayList; import java.util.Collections; import java.util.List; public class...

A list containing 2 more lists works slow in looping can I use thread to make this faster?

24 Feb 2018 by BillWoodruff

If you are serious about understanding time performance in .NET, I suggest you learn to use one of these open-source tools: BenchmarkDotNet (what I use) [^], or, AppMetrics [^]. By doing this, you will become a better programmer. Scott Hanselman wrote about BenchMark in 2016: [^]. Both these...

multi-threading

A list containing 2 more lists works slow in looping can I use thread to make this faster?

24 Feb 2018 by Akhil Jain

This is my code in which a list contains 2 more lists where the WorkItem collection contains a large number of records such as 7,000 it takes 10 min. Is there any way to make it faster and in case it's deciding the workItem type if it's a bug, task or product backlog item. Please tell me how to...

multi-threading

A list containing 2 more lists works slow in looping can I use thread to make this faster?

24 Feb 2018 by Patrice T

I see nothing obvious. You need to understand where and how time is spent, the tool of choice is a profiler. Profiling (computer programming) - Wikipedia[^] List of performance analysis tools - Wikipedia[^] [Update] Quote: have put stopwatch before and after the loop and it show's 10 min ...

multi-threading

A list containing 2 more lists works slow in looping can I use thread to make this faster?

24 Feb 2018 by phil.o

(workItem.WorkItemLinks[0].Lin...

multi-threading

C# CollectionBase complete definition

12 Feb 2018 by arunlakra15

Is there any way, we could view complete definition for CollectionBase class in System.Collection namespace ? Even in msdn, I couldn't find the method definitions in CollectionBase class. Although, the web pages in msdn contains only the properties and method declarations, the definitions are...

C# CollectionBase complete definition

12 Feb 2018 by Member 13674833

THE COLLECTIONBASE CLASS The .NET Framework library does not include a generic Collection class for storing data, but there is an abstract class you can use to build your own Collection class—CollectionBase. The CollectionBase class provides the programmer with the ability to implement a custom...

Finding an updating a custom object in a list

7 Jan 2018 by Maciej Los

I'm not sure i understand you correctly, but... If you want to get list of tables and their columns with information about primary keys, you have to change your PrimaryKeysObj this way: public class PrimaryKeyObj { private string schema = string.Empty; private string sPK = string.Empty; ...

Finding an updating a custom object in a list

7 Jan 2018 by User98743

My application iterates through the tables in my database. For each table that has a Primary Key, it needs to know the Primary Key columns. I'm using OleDb's GetOleDbSchemaTable, which returns a DataTable like this: Primay_Key_Name, Table_Name, Column_Name, Ordinal PK_ZipCode, Cities, ...

'Class methods' for plain arrays and std::array and vector too.

4 Jan 2018 by john morrison leon

Class method emulation for plain arrays plus unified handling of plain arrays, std::arrays and std::vectors

Few Words about ConcurrentHashMap

21 Dec 2017 by rtybase

An use case for ConcurrentHashMap

Filter list<string> using linq

13 Oct 2017 by Maciej Los

There's no need to use .StartWith or .Contains method. Simple .Replace should be enough :) var result = config.Select(x=>x.Replace("userdata.", string.Empty)).ToList(); Of course, if you want to return only data with member word, you can use: var result =...

Filter list<string> using linq

13 Oct 2017 by Member 10281805

Hi, I want to filter string list based on some condition as given below, List config = new List(); config.Add("userdata.member1"); config.Add("userdata.member2"); config.Add("userdata.member3"); ...

Filter list<string> using linq

13 Oct 2017 by Karthik_Mahalingam

try string[] userDataKeys = config.Where(x => x.Contains("userdata.")).Select(x => x.Replace("userdata.", "") ).ToArray();

Filter list<string> using linq

13 Oct 2017 by Pete O'Hanlon

You're almost there. First you need to identify which records contain userdata.. A where clause helps here:config.Where(x => x.StartsWith("userdata.")).Select(x => x.Replace("userdata.", string.Empty)).ToList();

Automapper list formember

21 Sep 2017 by Richard Deeming

You don't need to map the member; you just need to map both types. Given: namespace Db { public class Order { public List Ship { get; set; } } public class ShipOnly { public string Name { get; set; } } } namespace Dto { public...

Automapper list formember

21 Sep 2017 by Member 13229879

I want to map list of Dto to other object to using Automapper Source: public class Order { public List Ship { get; set; } } public class ShipOnly { public string Name { get; set; } } Destination public class Order { public...

Get a different numbers of images from collectioncell with use firebase

1 Sep 2017 by Member 13389077

How can i get a different numbers of images from collectionCell into scrollView with use firebase? In my project i have three viewController's. FirstVC - collectionView inside a tableView. CollectionView need for display the main images for scroll their. TableView need for display the name and...

How to Create a WCF WebService in VB.NET

16 May 2017 by Rene Bustos

WCF WebService IN VB.NET Response JSON

Arrgh.js - Bringing LINQ to JavaScript

14 May 2017 by Sander Rossel

Creating a lightweight JavaScript library that brings proper .NET-like collections and LINQ to JavaScript.

Large Collections in Native and Managed Code (VB, C++, C#) - Part I

26 Mar 2017 by Aydin Homay

In this article, I tried to show a real benchmark based on presser test method, for a Big Data collection deals on C++, C#, and VB.NET.

Same email address in both to and CC fields

16 Mar 2017 by Rockstar_

Hi All,I've added an email address in both TO and CC fields(same email in both textboxes). The recipient is getting two emails.My tester is expecting only one mail, I tried removing the duplicate email from CC field. But my tester is expecting when he opens the ibox and see the TO and...

Same email address in both to and CC fields

16 Mar 2017 by Jochen Arndt

Your tester does not know what he talks about. If you specify the same address multiple times, it will be send multiple times. It does not care in which of the destination fields ("To", "Cc", "Bcc") the address is specified. The SMTP server will parse all fields and forward the message to each...

I want to add more columns in query but I get an error

23 Oct 2016 by NotPolitcallyCorrect

Date is a reserved keyword. You will need to use something else.

How to make AML score request works in VB.NET?

20 Oct 2016 by Luiey Ichigo

Hi,How to make the generated code in Azure Machine Learning works on VB.NET?I'm stuck on part of defining scorerequest variable value.Original code from C#:public class StringTable{ public string[] ColumnNames { get; set; } public string[,] Values { get; set; }}class...

machine-learning

I need help resolving a concurrency problem using synchronized blocks

20 Oct 2016 by kjburns1980

I have written a publisher-subscriber system for a multi-threaded project I am working on. It is my understanding that when using SynchronizedList structural operations are supposed to be thread-safe, but iteration requires that the list be wrapped in a synchronized block.For these reasons,...

Mvc editorfor listitem add new from jquery

11 Oct 2016 by w1sph

Hi All,I am trying to figure out how to add a new 'row' in a collection in MVC4My model contains a IList.This list is looped, for every record a EditorFor is called.Everything works fine (including posting back), except adding a new record.I would like to collect the html of a...

Mvc editorfor listitem add new from jquery

11 Oct 2016 by w1sph

Yuk..dirty fix:Send a counter with the Editor ViewData, use this to manualy construct the name and id of the controls.in the Ajax call I send the HtmlTable tr count to the PartialView request. @Html.EditorFor(m => Model.Regels_[i], new { count = i...

Applications slow down when getting distinct of 50K+ records from datatable in C#

2 Oct 2016 by Gold$Coin

I am having Application slowness when i suppose to get distinct out a DataTable which has 50k+ records. i am using the below code to do it/// /// Generate Distinct Data Table from the Data Table Generated from server. /// Func