C
C#•4mo ago
fifty Shucks

C# Dictionary question

Hi, if i have a dictionary in C# defined like so: Dictionary<string, List<int>> test; and I do List<int> stringValue = test["string"]; is the resulting variable "stringValue" a copy of test["string"] or the actual list ???
3 Replies
Angius
Angius•4mo ago
A list is a reference type, so a reference to that list We can easily check that, though
MODiX
MODiX•4mo ago
Angius
REPL Result: Success
var dict = new Dictionary<string, List<int>>(){
    ["key"] = [ 1, 2, 3, 4, 5 ]
};

var list = dict["key"];
list.Add(17);

dict["key"]
var dict = new Dictionary<string, List<int>>(){
    ["key"] = [ 1, 2, 3, 4, 5 ]
};

var list = dict["key"];
list.Add(17);

dict["key"]
Result: List<int>
[
  1,
  2,
  3,
  4,
  5,
  17
]
[
  1,
  2,
  3,
  4,
  5,
  17
]
Compile: 350.837ms | Execution: 32.600ms | React with ❌ to remove this embed.
fifty Shucks
fifty Shucks•4mo ago
thank you
Want results from more Discord servers?
Add your server
More Posts
✅ Avalonia not showing rows in datagridThere are no rows in my datagrid in Avalonia, the headers are visible. I've checked if my list is emInfinite loop```c# /// ------------------------------------------------------------ /// <summary> /// Creates a sHow to connect my c# backend with the frontend?Hello, I created a ASP NET Core Web Api project with the command dotnet new webapi -minimal. In my ✅ Using `Func<ReadOnlySpan<char>,bool>` but not allowed due to Pointer TypeI am building a parser, and performance is of concern. So instead of allocating infinite strings wheconcurrency and atomicity Asp.net core web api and efcorelet's say there's an endpoint called AssingUser() ,this endpoint assigns one donation to this currenBuilding a generic repository for mongodbhello folks I was thinking build a generic repository structure for mongodb. but someday if i want Reading large xml file from archive by using XmlReader in Parallel modeHello 👋. I am looking for how can I read data from archive xml file in Parallel mode. I have archiResizing the Console window - Console ApplicationHi there, I'm trying to resize the console window in a Console Application. I have tried multiple ✅ Creating a datetime with a timezoneHow do I create a `DateTime` with `new DateTime(2010, 05, 12);` and give it a specific `TimeZoneInfoCustom Newtonsoft JSON deserializationI have a dictionary where: - The key will always be a string - The value will be either: - string