topo_three.rs

mod Graph {
  use std::collections::HashMap;
  
  pub struct DAG {
    graph: Option<HashMap<u8, Vec<u8>>,
  }

  impl DAG {
        pub fn new(graph_info: Vec<(u8, u8)>) -> Vec<u8> {...}

        pub fn get_topological_order(&self)-> Vec<u8> {
            ...
            stack.reverse();
            println!("THE STACK!! {:?}", stack);
            return stack;
        }

        pub fn get_order(&self, node: &u8, stack: &mut Vec<u8>) {
            let receiving_nodes = self.graph.as_ref().unwrap().get(node);

                if receiving_nodes != None {
                    for value in receiving_nodes.unwrap() {
                        self.get_order(value, stack);
                    }
                }
                if !stack.contains(node) {
                    stack.push(*node);
                }
        }
}