I am looking for some immutable collections in C#, specifically, a List/array type one, and a set/hashset type one. I'm clarifying if there are 'built in' .NET types that do what I want (I realize ...

I have a function that is being repeatedly called via a thread. Randomly some times it raises this exception. System.InvalidOperationException: Collection was modified; enumeration operation may not ...

I've lost several days trying to debug an issue that boils down to this: Properties of type IImmutableDictionary can appear to be initialized in code but actually remain empty. Why is the compiler ...

Is there a way to show a warning when you call ImmutableList<T>.Add but don't use its result? I thought CA1806 would do that, and it does for some methods that return results (like string....

I know it's not possible to cast derived lists (why not is nicely explained here), but what about ImmutableArrays as they cannot be changed casting should be valid, right? I would expect this to work: ...

I'm getting this error continuously Failed to execute goal deploy: {"WFLYCTL0062: Composite operation failed and was rolled back. Steps that failed:" => {"Operation step-1" =>...

In the .NET Framework, there are interfaces for immutable dictionaries, lists, queues, sets, stacks. But there is no interface for immutable arrays to be found. Also, immutable arrays are implemented ...

I'm trying to understand the exact difference between the 3 following methods of the ImmutableArray struct: the static method ImmutableArray<T>.CastUp<TDerived> the instance method ...

I am looking to avoid multiple if-else conditions. Is there a more concise way of writing the below code? private Set<String> getValues(Optional<String> one, Optional<String> two) { ...

What is the differences between ways of creating ImmutableList? List<int> numbers = new List<int>(){0, 1, 2, 3}; ImmutableList<int> immutableList = numbers.ToImmutableList(); ...

I'm trying to understand the functional programming paradigm so I'm playing around with an immutable linked list. I've created a Bag with some utility functions and now I want to iterate through the ...

Have a question about creating new objects using existing objects in python. Example: I want to implement immutable Stack using python. However, catch here is, whenever I am creating new object, it ...

I get the error above when I apply my UDF, which is defined as followed: import org.apache.spark.sql.functions.typedLit import org.apache.spark.sql.functions.udf def method_name(map:Map[String, Array[...

I need to implement an immutable collection which supports collection initialization syntax. The problem is in order to support collection initialization syntax, the collection must provide ...

In the thread When immutable collections are preferable then concurrent it is stated that immutable collections may be slower but they save memory. How is it possible if every change of immutable ...