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I have a Dart class that I am using as a node class for a tree data structure.

My goal here is to encode objects of this class and its child nodes recursively.

I have a toJson() method that takes the child Nodes List and calls jsonencode on them.

Consider the following code with an emphasis on children_iter():

I created a helper function get_node() for a common pattern, but for some reason it leads to borrow errors, but when copy pasting its contents it does not. I've marked the problematic lines with comments:

I'm trying to create some classes in Swift 5 to represent a directed Graph. I'm finding Swift generics to be very confusing and restrictive.

This is what I've got so far, but no matter what I try, Swift seems to come up with some obscure error or other (two are shown below in comments).

Can I even achieve this kind of structure in Swift without hardcoding Node to a specific concrete type?

I want to allow the Node type to be changed, so that I can add additional properties to the Node and Edge types according to the needs of the problem.

I am trying to execute tarjans algorithm on a set of nodes from a graph, I can succesfully find Strongly Connected Components, however the root or the low value node is always off, even for SCC's with only 1 element the root node does not match that element For Example:

I'm trying to serialize an object of the following type

std::unordered_map, std::unordered_map>& nodeMap

Card is a struct, InfosetHistory and Node are classes which use some other structs as member variables. I have created serialize functions for all classes that need it. For example here's the one for Card:

I have the following function running several times on 6 different threads, with the same nodeMap being passed to each function. I'm sure that the keys being read and written to on each thread are independent (no two threads will have the same histories). Despite this, occasionally this code will output "Preposterous". When working with one thread, this would be impossible, as if nodeMap didn't contain histories[state.currentPlayer], then a node with that key would be added to the map, and it would be found in the last if statement.

Using the LEMON C++ library and GraphToEps, I am trying to visualize a grid graph with accompanying edge (or arc) weights, without luck. Here's what I've got in my main() so far:

I have a simple program which incorporates signalling between QML and C++.

I currently have two cases where I need to signal from C++ to QML.

The first is from one of my source files/classes, "Search", and the second is from a different c++ source file/class, "Node".

The signals in the first case are received by a dynamically created QML object, using parent.dynamic_object_name = Qt.createQmlObject(QString,parent,'name');

In this dynamic object, the following code receives the signal "someAction"