html: What technologies should I learn to create a website with a multi-selection drop-down menu dynamically filled in with automatic saving?

I am new to web development. I hope to be in the right stack exchange. I just understood the forms, DOM, main uses of HTML, CSS and Javascript. That said, here is my requirement. Let's say I have a website that has several multi-selection drop-down menus.

  1. Car brand: This multi-selection drop-down menu would be completed from the options in a database such as AWS DynamoDB (I know that the query syntax is different). Something like SELECT * FROM carmaker; The rows of all these queries should appear as options in Car brand Multiple selection drop down.

  2. Car name: When selecting options in Car Make, the next multi-selection drop-down menu is Car Name, where all the tables that were Car Make options will be consulted. If I have selected two options of Car brand multiple selection drop down then Car name the multiple selection options would be SELECT * FROM option1, option2, option3 etc.

There are no submit buttons in any of these multiple selection drop-down menus. As I select all options, the following drop-down menu should be filled in properly. There should also be this automatic save option where the page will remember the chosen option

Things I can use: any AWS service for databases, asynchronous calls, call services, React.js, Bootstrap.

I would just like to know what I should look for in Google:

  1. Dynamic multi-selection selection options that are filled when querying a database without a Submit button.
  2. Autosave feature.

Excel 2016 Data Validation performance drop-down menu

I have a relatively large Excel workbook, and on one sheet I have to use data validation (list) in two of the columns. I would prefer to use the drop-down box, but for some reasons the performance is horrible, it takes several seconds to navigate between the cells. However, if I use the same data validation but without the arrow in the drop-down box, it will be agile and fast again.

I have tried googleing and searching here in vain. In Excel I tried to turn the following on and off without help:

  • Graphics hardware acceleration.
  • Multi-thread calculation
  • Multi-threaded processing
  • Formula Recalculation

The computer is a Zbook 15 with i7-6700HQ and Nvidia Quadro M1000M.
Any advice or help is greatly appreciated.

8 – How to add an additional eventlistener to the menu object in the attached library

This is my first Drupal 8 project and I have a problem to discover how to attach an additional event handler to an object.
I'm working on a custom theme using Radix as a base theme. I'm using Superfish as a menu module.
One of the problems is that Superfish creates a menu & # 39; root & # 39; additional call & # 39; Menu & # 39; that is displayed when you click on the menu of the Bootstrap burger. Afterwards, you must click on & # 39; Menu & # 39; to show the real menu (accordion).
I found a snippet of code in a problem: that hides the & # 39; Menu & # 39; option, but I can not make it work.

I have configured a library definition and created a & # 39; script.js & # 39;

import "popper.js";
import "bootstrap";

(function ($, Drupal) {
Drupal.behaviors.helloWorld = {
attach (context) {
console.log ("Hello World");

Drupal.behaviors.myMainMenu = {
attach (context) {
console.log ("myMainMenu:" + context.toString ());
$ (". navbar-collapse", context) .once (& # 39; myMainMenu & # 39;). in (
() => {
console.log ("navbar-collapse");
if (! $ ("# superfish-main-accordion"). hasClass ("sf-expanded")) {
console.log (& # 39; not expand & # 39;);
$ (". superfish-main-toggle")
}) (jQuery, Drupal);

I know the script runs, because I see & # 39; Hello World & # 39; and & # 39; myMainMenu & # 39; + Sometimes glob in the console. But I never manage to get the other messages from the console.

I also know that the code in the if statement is correct, because if I execute it manually in the console, it works as expected.

What should be the correct code?

c ++ – extendable tree header context menu

I have a Qt tree view that has a custom tree header. The tree has a so-called mode, by default there are two. During each of the modes a different tree is shown. The mode selector is presented as a contextual menu of the tree header.

Having a contextual menu in the tree header is not that difficult. But in my case, I need to make a tree header so that the user of my code can add new modes, be their corresponding tree view indicators and an action in the context menu to change to the new mode.

Below is my code for the tree header. Please let me know if you have any comments.

TreeHeader class: Public QHeaderView
TreeHeader (QWidget * parent = nullptr) noexcept;

QAction * getModeAction (const QString & sActionTitle) const;

void addModeAction (action QAction *, mode eTreeMode, QAction * before = nullptr);

/// Cancel the event from the context menu
void contextMenuEvent (QContextMenuEvent * event) invalidates;

/// The context menu
QMenu * m_pContextMenu = nullptr;

/// Configure the connections and data needed for the given action.
void setupAction (action QAction *, eTreeMode eMode) const;

}; // class TreeHeader

TreeHeader :: TreeHeader (QWidget * parent / * = nullptr * /) noexcept
: QHeaderView (Qt :: Horizontal, parent)
, m_pContextMenu (new QMenu (this))
std :: vector <std :: pair> mapModeToName;
mapModeToName.emplace_back (eTreeMode :: Mode1, QString ("By% 1"). arg (mode1));
mapModeToName.emplace_back (eTreeMode :: Mode2, QString ("By% 1"). arg (mode2));

// create default actions
for (const auto & pair: mapModeToName)
// Add the action to the menu and configure the necessary properties.
setupAction (m_pContextMenu-> addAction (pair.second), pair.first);

setTextElideMode (Qt :: ElideRight);
setStretchLastSection (true);

QAction * TreeHeader :: getModeAction (const QString & sActionTitle) const
for (const auto pAction: m_pContextMenu-> actions ())
if (pAction-> text () == sActionTitle)
pAction of return;
returns nullptr;

void TreeHeader :: addModeAction (action QAction *, mode eTreeMode, QAction * before / * = nullptr * /)
if (! action) returns;

// add the action in the appropriate position
if before)
m_pContextMenu-> insertAction (before, action);
m_pContextMenu-> addAction (action);

// configure the properties required for the action
setupAction (action, mode);

void TreeHeader :: contextMenuEvent (QContextMenuEvent event *)
if (auto pTree = static_cast(parentWidget ()))
// Make sure we have a populated tree
if (! (pTree-> getTreeModel () && pTree-> getTreeModel () -> hasChildren ())) return;

// shows the context menu only for the first column specifying the grouping mode
if (logicalIndexAt (event-> pos ()) == 0)
// get the current mode
auto eMode = pTree-> getMode ();

// establish proven correct states of actions
for (const auto pAction: m_pContextMenu-> actions ())
pAction-> setChecked (eMode == static_cast(pAction-> data (). toInt ()));

// and show the menu
m_pContextMenu-> exec (event-> globalPos ());

void TreeHeader :: setupAction (action QAction *, eTreeMode eMode) const
// make the action verifiable and verify, if necessary
action-> setCheckable (true);

// establish the proven state of the action and make the necessary connections
if (auto pTree = dynamic_cast(parentWidget ()))
action-> setChecked (pTree-> getMode () == eMode);

// configure a connection to process in mode change
if (auto pView = dynamic_cast(pTree-> parentWidget ()))
// configure a connection to process the mode change
connect (action, & QAction :: triggered, pView, & TreeViewContainer :: onModeChanged);

// set the mode as data
action-> setData (eMode);

wi fi – How to reconnect wifi that says disconnected in the samsung service menu s6

I have a Samsung s6 and the wifi has dimmed for a while.
This is what I tried to do.
First step
Verified WiFi settings: in the advanced tab, locate Keep WiFi during sleep mode. found that this is set to "Always"

  • Change my watch to bad weather
  • In Automatic date and time setting and time disabled
  • Set my device at the wrong time
    then go to the home screen and use the recent apps button located to the left of the start button and close all applications
  • Return to the Date and Time settings and configure my device at the correct time
    This will help to reset the internal clock of my device to my network
    – Clean the cache partition of your device
  • Verify that all applications are up to date and turn off the phone, then turn on the device again

Wifi was still off

Second step

  • I opened my bookmark and then I dialed * # 0011 # that opens the service menu, press the menu key, click on WiFi, it says disconnected status

How can I enable it so I can use WIFI again?

How to make it obvious that autocomplete is not a drop-down menu

Let's say we have an autocomplete like this.

The autocomplete has thousands of possible results, so we only show the first 20 results. Some of the results are very similar. This leads to two problems:

  1. Users click on the entry field, the drop-down menu opens and they do not understand that they could use the entry to filter to get more results.
  2. Users actually use the entry to filter. Still, they only see 20 e.g. 500 real results.

I already thought about those solutions:

  • Load 20 more results when you scroll down. Similar to this autocomplete. I tried this, but still the users did not understand that they could use the input to filter.

  • It shows a help text at the end of the drop-down list with a text indicating that there are x more results, but you must filter them. I also tried this, but the users did not know the exact term of the result, so they end up not finding the entry they are looking for.

I was hoping for some best practice tips for that type of autocomplete, I have the feeling that I'm missing something crucial here.

Thanks in advance!

ionic frame – Hidden menu when you click on the item & # 39; div & # 39; Exterior

I am creating a simple ionic panel consisting of a toolbar on the top and a collapsible menu (navigation bar) on the left side. The menu alternates with the menu button in the toolbar, but when you click on the component & # 39; div & # 39; The menu is also hidden independently.

      // create menu items
Hello World
I hope that the menu remains open / unchanged when clicking on the greeting world.

php – Get child's child pages in personalized menu

I got this snippet of code that runs, that gets the page ID and shows all the child elements below. What is good.

The second part of this is to have the child pull the items.

So now it looks like this

Main menu element
Children's article
Children's article
Children's article

But I need you to look like that

Main menu element
Children's article
Children's article
Children's article
Children's article

This is the code that I am using

    & # 39; page & # 39 ;,
& # 39; posts_per_page & # 39; => -1,
& # 39; post_parent & # 39; => 92,
$ parent = new WP_Query ($ args);
if ($ parent-> have_posts ()):?>
        have_posts ()): $ parent-> the_post (); ?>
  • <a href = ""title ="">
  • Development of themes: global navigation menu in different wordpress configurations.

    I have 2 different wordpress sites but I have implemented it as and Now I'm trying to get the main menu from and it should work with

    main objective of this functionality if I am changing a link in the menu or adding a new page, so it should be automatically added to the other website.

    What is required for a display menu item to be displayed as a link on the Drupal 7 administration page?

    I am creating several views that will be used as reports. Since everyone has a common theme, I'm grouping the views in a secondary path of admin / reports (e.g. admin / reports / data / needs_correction Y admin / reports / data / status).

    With most of the administration sections in Drupal, there is usually a home page that lists all the sub-contents of the section. So, to provide that, I have implemented it. hook_menu () in the function that contains the exported report views, as follows:

    / **
    * Implement hook_menu ().
    * /
    MY_menu () {function
    $ items = array ();
    $ items['admin/reports/data'] = array (
    & # 39; title & # 39; => & # 39; Data Reports & # 39 ;,
    & # 39; description & # 39; => & # 39; Various reports on the status of data in the system. & # 39 ;,
    & # 39; position & # 39; => & # 39; left & # 39 ;,
    & # 39; page callback & # 39; => & # 39; system_admin_menu_block_page & # 39 ;,
    & # 39; access arguments & # 39; => array (& # 39; access management pages & # 39;),
    & # 39; file & # 39; => & # 39; & # 39 ;,
    & # 39; File path & # 39; => drupal_get_path (& # 39; module & # 39 ;, & # 39; system & # 39;),
    returns $ items;

    The only problem is that, after an erasure of the cache memory, when I browse to admin / reports / data, all I receive is the message "It has no administrative element".