java – Convert a binary tree to a double index list

Challenge

Link on geeksforgeeks: Binary tree in DLL

Given a binary tree (BT), convert it to a double-link list (DLL)
In place. The left and right pointers in the nodes should be used as
previous and next pointers respectively in the converted DLL. The order of
The nodes of the DLL must be identical to Inorder of the given binary tree. the
the first node of the Inorder sequence (the leftmost node in BT) must be headed
node of the DLL.

visualization

Your task:

You do not have to take any comments. Complete the function bToDLL() this
take the node and the head as a parameter. The driver code prints the DLL at once
manners.

The following code is given. Class Node can not be changed. Method bToDLL must be implemented, but its signature can not be changed.

class Node
{
    Node left, right;
    int data;

    Node(int d)
    {
        data = d;
        left = right = null;
    }

}

// This function should convert a given Binary tree to Doubly Linked List
class GfG
{
    Node head;
    Node bToDLL(Node root)
    {
        // TODO .. convert tree and store the result as head
    }
}

Solution

I've opted for an elegant solution, in which I make a linked double circular list to allow easy searching of the first and last node of the list. Any type of return is invited.

class GfG
{
    Node head;
    Node bToDLL(Node root)
    {
        Node tree = new Node(0);
        tree.left = tree.right = tree;
        bToDLLCore(tree, root);
        head = tree.right;
        head.left = null;
        tree.left.right = null;
        return head;
    }
    void bToDLLCore(Node tree, Node node) {
        if (node == null) return;
        bToDLLCore(tree, node.left);
        append(tree, new Node(node.data));
        bToDLLCore(tree, node.right);
    }
    void append(Node tree, Node node) {
        tree.left.right = node;
        node.left = tree.left;
        node.right = tree;
        tree.left = node;
    }
}

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ZSH Autocomplete broken if prefixed by double dash (-)

I notice this when using a command accepting additional arguments after a double dash, for example:

npm test -- spec/blah-spec.js

In a clean and clean installation of ZSH v5.3, tabulation completion works correctly:

npm test -- spec/blah

But as soon as I add the following lines to my .zshrc:

autoload -U compinit && compinit
zmodload -i zsh/complist

In this case, the end of the tab is broken (tabulation does not matter).

Is there a way to have custom finishes without breaking this use case?

8 – Migration in the Double field

I'm migrating a CSV to a D8 node type that has a double field. The CSV has the following structure:

enter the description of the image here

I'm trying to migrate the year, from the header, in the first two-field subfield (as a label) and the population data for each country (Afghanistan, in the example above) in the second two-field subfield.

The dual-field has the following interface (the data in this example was entered manually):
enter the description of the image here

And here's how the data is represented in the node, as seen via Devel:
development output

I have tried a variety of things in my yaml migration code but I have not been able to migrate data from the year or from the population. My code is below:

.
.
.
process:
  type:
    plugin: default_value
    default_value: census
  title: 'Country Name'
  field_country_code: 'Country Code'
  field_count_first:
    0:
      plugin: get
      source: 
        - 1960
.
.
.
------- also - tried -----------
.
.
.
process:
  type:
    plugin: default_value
    default_value: census
  title: 'Country Name'
  field_country_code: 'Country Code'
  field_count:
    first:
      0:
        plugin: get
        source: 
          - 1960
.
.
.

I would appreciate a little help.

Double start menu not displayed

I had installed linux mint 19 on my windows 10 laptop keep to remember Windows and linux mint are installed separately on two disk drives on the same hard drive, but after the successful installation of linux, the system reboots and opens automatically under Windows 10, it does not show up. the choice to choose between Linux and Windows, how can I boot to Linux in such a situation

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Send an error for the double C # connection

I'm implementing a login system, but I can not send an error message when the connection is duplicated.
I have declared the login as follows:

(Index("User_UserName_Index", IsUnique = true))
public string Login { get; set; }

But I can not go back wrong by saying that login already exists

I thought about using a tryBut I do not know how I could do that.

For verification of the connection, I proceeded as follows

public class LoginController : Controller
{

    Contexto db = new Contexto();
    // GET: Login
    public ActionResult Index()
    {
        if (TempData("ViewData") != null) 
        {
            ViewData = (ViewDataDictionary)TempData("ViewData");
        }
        return View();
    }

    public ActionResult Autenticar(string login, string senha)
    {

        try
        {
            var usuario = db.Usuarios.FirstOrDefault(p => p.Login == login && p.Senha == senha);

            if (usuario.Admim == true)
            {
                Session("admLogado") = usuario;
                return RedirectToAction("Index", "Usuarios");
            }
            else
            {
                Session("usuarioLogado") = usuario;
                return RedirectToAction("Login", "Home");
            }
        }
        catch(Exception ex)
        {
            ModelState.AddModelError(string.Empty, "Usuario ou senha invalidos");
            TempData("ViewData") = ViewData;
            return RedirectToAction("Index");
        }


    }

Double starting Linux Mint with Windows 10

I am having Dell Vostro 15 RAM-4GB with 500GB hard drive and Intel i3 processor. The Linux and Windows environment works correctly if I double boot.

Geometry – Are double quaternions and 3D multivectors isomorphic?

Double quaternions are commonly used as a representation of SE (3) in animation and robotics, with the second quaternion "epsilon" being used to encode translation. This seems quite natural, because the fact that the rotation can influence the position, but not the rotation, is directly integrated into the structure.

Nevertheless, it seems that the 3D multivectors of geometric / Clifford algebra could be an even more natural fit, since the units associated with the vector and bivector components would correspond to the geometric dimension of the quantities they encode. However, when they are multiplied, they allow the odd elements of the two multivectors to combine and return to the even "rotor" components.

Is there a simple correspondence between these two algebras, perhaps achieved by multiplying the odd elements by a nilpotent multivector (perhaps | 1 + e0 ^ e1 ^ e2 |), or do these two algebras behave fundamentally different?

Import mysqldump with double triggers?

I have a simple and quick question to clarify. I have a medium sized 400 GB database running in Mariadb 10.2 with lots of tables and lots of triggers. I am planning to take a mysqldump and import it on another server. So, when we use mysqldump, it will also contain default triggers. So, if I import this dump with tiggers on another server; does this trigger on import and create duplication? I know we can take dump without triggers but I was wondering if I imported a dump with triggers it was duplicating?