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user behavior – Search button or input field for search in the top navigation bar of the website?

In this article by Nick Babich, Design a perfect search box, he suggests that if the search field is important, it should be clearly visible, displaying the text field instead of the single button. The main reasons are:

  • It can be the quickest discovery route for users;
  • The search hidden behind an icon makes the search function less visible;
  • Hidden search increases the cost of interaction.

nolock – if it exists (select the top 1 1 of the table name ……) does not work properly in the SQL server

My request is like this –

if exists(select top 1 1 from tablename where userid = @user and ruleid = @rule)

    @errormsg = ' you are no longer part of this queue'

The above code is part of the procedure and the user receives this error message intermittently. Sometimes it receives this message and other times the functionality works as expected. He definitely has access to the queue but the if exists (…) does not work properly all the time.
I am unable to reproduce this error on my side. tried to duplicate it by asking multiple users to perform the same operation simultaneously, but no luck.
I have identified that the table name is missing a "nolock" hint which I have added. But I don't know if that solves the problem.

Any ideas that could go wrong?

Vector – How to prevent sprite capture from top to bottom during diagonal movement when releasing the keyboard

I have a sprite that faces 4 directions depending on the entrance. All this works well, except for my keyboard input.

If I press down right simultaneously on the keyboard and release both keys, there is a moment when I press only the right key. This creates a snap of my sprite when releasing the keys where now I'm suddenly turned to the right instead of the bottom.

basically i would like to release the x and y buttons at the same time but i don't have a good way to detect this. his TOO sensitive.

    pressed_vector.x = int(directions.right) - int(directions.left)
    pressed_vector.y = int(directions.down) - int(directions.up)

    dpad_vector = pressed_vector.normalized()

this is the standard entry code you see everywhere.

I have the player mapped to a virtual joystick, dpad, etc. and I don't have this problem because on release, you will release your x and y keys at the same time. I don't know how to handle this with the keyboard.

Linear algebra – What is the relationship between the eigenvalues ​​of $ AA $ and $ AA ^ top $?

Suppose the matrix $ A in mathbb {R} ^ {n times n} $ and, what do we know about the relationship between the eigenvalues ​​of $ AA $ and $ AA ^ top $?

Or any clue about the relationship between $ trace (AA) $ and $ trace (AA ^ top) $?

A is not a symmetric matrix, but it can be generated from $ A = BC $ or $ C in mathbb {R} ^ {n times n} $ is a semi-positive definite matrix and $ B in mathbb {R} ^ {n times n} $ is a diagonal matrix with $ pm1 $ its diagonal elements.

I know it $ trace (AA ^ top) = trace (CC ^ top) $. Is there any information we know $ trace (AA) $?

Move Tag Manager preview mode to the top of the page?

I want to move the preview mode of Tag Manager to the top of the page. I'm testing in Google Developer Tools on a mobile device, but the preview mode is in front of some buttons that I want to test. Can I move it?

css – Navigation interruptions in the top bar in Safari

My navigation should be in the lower black bar when the user is at the top of the page, and when the user scrolls down, the navigation switches to the upper bar. My problem only appears in Safari, when the user scrolls down then goes up, my navigation in the top bar hangs. Any ideas how to fix this problem? enter description of image here

css – How do I create a drop-down menu with a top margin (or just a space)? Mouse cannot keep dynamics active

I want to create a vertical space between my parent menu and its drop-down menu, but if I give it a higher margin, the mouse cannot hover over the menu and keep it actively displayed.

Here is my code for the menu:

    float: right;
    margin-bottom: 30px;

.main-navigation ul ul{
    text-align: right;
    float: right;
    margin-left: -200px;
    margin-top: 10px;

.main-navigation ul ul a{
    text-align: right;

    margin-top: 10px;
    width: 230px;
    background-color: black;

I use underlines as the theme.
The only other thing I added is the right alignment.

Another solution than the top margin could be interesting.
I thought of inserting an item at the top of the submenu list item as a fill using something like:

.sub-menu li:first-of-type::before{
    background-color: transparent;

But I don't know how to control the height or make this element transparent.

I will find the top 100 profitable keywords for 2 topics / categories that actually work. for $ 10

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How to display the view with the page (top) and the block (bottom)

enter description of image here

Is it possible?
Who can help my problem?