SQL query: Find the element with the highest frequency

I'm trying to write a SQL query to find the mode, i.e. the element that occurs more often than other elements. For example: 2,2,1,1---->Here, the output should be empty (both 1 and 2 appear twice) 3,3,3----->Here, the output should also be empty (without second element) 3,3,1----->Here, the...

P粉903969231 2023-09-12 10:36:13 0  1  620

javascript - js array finds elements by index and returns

js array finds elements by index and returns the element

为情所困 2017-05-19 10:37:33 0  4  590

javascript - Adjacent elements have spaces, how to find out the previous sibling element it is adjacent to, instead of #text?

{code...} {code...} Take out the li element and bind the click event {code...} Now I click on the second li element, but I want to find out the adjacent brothers of the second li element element then I use .previousSibling; but what comes out is #text, not the first li element, when I...

ringa_lee 2017-06-30 09:52:23 0  1  753

html5 - Pseudo-element added but cannot be seen when viewing the element

{Code...} I want to set the animation in two directions in this way. When superimposed, the effect of a curve will appear. However, the pseudo element added now cannot be seen when viewing the element. May I ask why? What is wrong?

为情所困 2017-07-04 13:45:09 0  2  2035

javascript - Find the starting index of consecutive repeating elements in an array?

{Code...} Find the starting index of consecutive repeated elements. Looking for a less complex algorithm?

学习ing 2017-06-26 10:51:51 0  3  1258

Make sure the classname element Nuxt JS/Vue Jest checks exists on the page

I'm new to the Jest test suite for VueJS and integrating it into my NuxtJS application. I've set up some basic tests to check if the component is a Vue instance and these tests pass successfully. I'm now trying to find an element on my page and check if it exists, and what content might be in it. Th...

P粉982054449 2024-03-31 19:10:41 0  1  478

mongoose - Query with mongodb to match the value of a string with each element of the array

There is a document query and all the results are as follows: {Code...} Now there is a requirement to query the data that matches the teamId with the elements in the array. For example, the condition array is as follows: {Code...} How should I write the query statement? You can query the following t...

巴扎黑 2017-05-02 09:23:36 0  2  961

How to view the Vue method bound to an element when inspecting the element in a browser such as chrome?

As we all know, in the previous jq era, event handling functions could be added by adding attributes such as onclick to the tag. In this case, you can know which method is bound by right-clicking on the element in the browser, and you can even see which line in the code this method is on. However, a...

世界只因有你 2017-06-26 10:55:57 0  5  1081

HTML elements cannot be located during web crawling. This element is visible in the site inspection tool

I'm trying to crawl the titles of all tables from this URL: https://www.nature.com/articles/s41586-023-06192-4 I can find this HTML element on the website: <bid="Tab1"data- test="table-caption">Table1CalculatedCt–M–Ctangles</b>I cannot crawl this title

P粉225961749 2023-09-19 12:41:46 0  1  608

javascript - Why can't jqeury's ID selector with string concatenation be used?

{Code...} In this code, checkeds is an array of ids. The third line is to find elements with the .text-status style in the sibling elements of the parent of the id element and remove the text-green style. But it cannot take effect. The following is the content of the searched parent element td repor...

phpcn_u1582 2017-06-30 09:59:52 0  6  964

Check if there is an element in the array that is twice N equal to M

I started to solve the problem on leetcode, this problem did not pass the test case, this is my attempt: functioncheckIfExist($arr){$i=0;$j=0;$n=count($arr);//Loop through Array for($i;$i<$n;$i++){for($j;$j<$n;$j++){//Check whether elements i and j are different and N*2=Mif($i !=$j&&$a...

P粉663883862 2023-09-11 13:15:10 0  2  520