How to calculate the percentage of an element's scroll position?

I want to calculate the scroll position of an element within a window as a percentage. 0% is where the top of the element is at the bottom of the window (not shown yet) 100% is where the bottom of the element is at the top of the window (all elements are shown) I'm close, but I know I'm thinking som...

P粉786800174 2024-04-03 19:55:00 0  1  570

Group by group, calculate the sum of occurrences of each group, and print the data as a formatted string

I want to group and sum the data of some rows based on the values ​​of two columns. My input is: $array=[['FA',12.9],['FA',12.9],['FB',12.2],['FC',12.3],['FA',12.9],[ 'FB',12.9],['FA',12.4],];I want to print the grouped row values ​​as a string, followed by an x ​​and the total number of occurrences...

P粉970736384 2023-09-05 22:43:27 0  1  478

Problems after adding borders to css3 flex child elements

After the parent element is set to flex, the child element {flex:0 0 33.3333%} can be divided into three equal parts in the same row. However, if a border is added to the child element, only 2 can be arranged in the same row. Flex elastically expands and contracts, and the border width is not calcul...

漂亮男人 2017-05-16 13:27:46 0  2  939

Retrieving the width of an element when using inline JSX rendering in a return statement

I have an element and I want to calculate its width and then iterate how many times it takes to at least fill the width of the viewport. The problem is, I can't get the width via the inline JSX render style I'm using. Even if I set it as a dependency, I still get the refWidth is empty error in useEf...

P粉441076405 2023-09-20 22:00:52 0  1  685

How to solve this problem?!!~~~

<?php/*1. Calculate the total order price according to the given menu (menu) and order (order)*/$menu = '[                 {"type_id":1,"name":"大菜","food": [                    

███ 2018-09-07 23:41:15 0  3  1578

javascript - vuejs+elementui shopping cart price calculation, click the plus or minus sign to modify the quantity and the total price will not change, but the calculation is executed

The function of placing an order for a product finds all the products, clicks to place the order, and then adds the ordered products to the shopping cart. The shopping cart does not need to save the products. You can modify the quantity and calculate the total price. Now the calculation in my method...

巴扎黑 2017-07-05 10:58:23 0  2  1269

show() is invalid after ajax success

The console can print login success and 222, but the element always flashes on the page and disappears. What's going on?

PHP中文网 2017-05-19 10:40:54 0  3  533

How to find the sum of a set of numbers

Given an array [1,2,3,4], how to find the sum of its elements? (In this case, the sum would be 10.) I think $.each might work, but I'm not sure how to implement it.

P粉642920522 2023-08-23 11:40:32 0  2  471

新标题：Calculate the average of each group relative to the total sum

I want to get the sum of group A and group B separately and then divide by the sum. I tried using this: selectname,sum(qt)fromntblgroupbynameorder_id nameqt1a122a203B334B45 the result should be: nameqtdva320.29B780.70

P粉852578075 2023-12-28 16:05:46 0  2  341

vue.js using public event bus - Stack Overflow

While practicing the use of the Vue framework and writing a todo demo, I wrote the input element (new-input component) and the ul and li elements (todo-items and todo-item components) that display to-do items into two parallel Component, now enter text in the input component to add, and use the publ...

黄舟 2017-06-12 09:25:35 0  2  916

Loop through multiple elements and calculate the price discount for each element

I'm trying to find the percentage difference between the old price and the new price for each individual. Currently, my code only gets the percentage difference of the first one and loops the same percentage difference into the rest. Does anyone know how to update this code to target each individual...

P粉506963842 2023-09-02 17:14:31 0  1  498

Calculate the sum of fields in another table using MySQL SQL query

I have a schema like this: User table with attributes "user_id" and "username" and orders table with attributes "customer_id" (FK of user_id) and "finalPrice" Database schema I want to get the highest price among all order combinations The user (basically the ...

P粉244155277 2024-04-06 19:39:29 0  1  670

Get the bounding box of a div element: jQuery implementation method

I want to calculate the bounding box of a div element via jQuery/JavaScript. I tried the following code: // The left side of the box document.getElementById("myElement").offsetLeft; // The top side of the box document.getElementById("myElement").offsetTop; // The right side of th...

P粉207483087 2023-08-22 11:18:36 0  2  500

Can PDF files run HTML5 and Javascript?

I have a stupid idea to try and make a program that won't be blocked on any computer since it will be embedded in a PDF (I heard Javascript can run in PDFs). It will run HTML5 and Javascript (and a little bit of CSS) in PDF files, mainly using the canvas element in HTML5 and WebGL in Javascript. Is ...

P粉113938880 2024-04-05 12:57:00 0  1  627

A method that can be combined with any selector is to use another selector in the pseudo-class :nth-child() or :nth-of-type()

Is there a way to select every nth child element that satisfies (or does not satisfy) an arbitrary selector? For example, I want to select every odd table row, but within a subset of rows: table.myClasstr.row:nth-child(odd){...}RowRowRowRow but :nth-child() only seems to count all tr elements regard...

P粉926174288 2023-08-14 15:21:18 0  2  603

Group users (total users, admin users, control operators, guards) using Eloquent queries

I have a query that counts all users, the total number of users with role "admin", the total number of users with role "control_operator" and the total number of users with role "guard". The query is working but there is a glitch/bug that I can't figure out. There are a...

P粉026665919 2024-04-05 12:11:26 0  1  409

"Laravel joins two tables and calculates the sum of the columns of the given related table"

I have two tanulky star and video and relationship in model //in Star model publicfunctionvideos(){return$this->belongsToMany(Video::class);} and //in Video model publicfunctionuser(){return$ this->belongsTo(User::class);}If I execute $stars=Star::with('vi

P粉617597173 2023-09-05 16:22:37 0  1  511

Adding two numbers concatenates them instead of calculating the sum

I'm adding two numbers but I'm not getting the correct value. For example, executing 1+2 returns 12 instead of 3. What am I doing wrong in this code? functionmyFunction(){vary=document.getElementById("txt1").value;varz=document.getElementById("txt2").value;varx=y+z;document.getEl

P粉136356287 2023-10-10 16:52:00 0  2  674

How to calculate the sum of two columns and the number of related relationships in laravel?

I have two tables: buyers and orders. Buyers have many orders. I want the sum of all buyers and the number of orders and two columns of orders (price, fee) for a specific time period. I can get the count by doing, Buyer::withCount(['orders'=>fn($query)=>$query->where('created_at','>=',$d...

P粉788571316 2024-02-21 11:59:52 0  2  471

javascript - Algorithm question: Take n elements from an array to generate a new array. How many can be generated?

For example, if you take the array [1,2,3] and take 2 elements to generate an array, there will be three situations: [1,2], [1,3], and [2,3] (the same numbers are counted as one, for example [1,2] and [2,1] are considered the same), please implement it, preferably js? Please give me more advice!

某草草 2017-05-18 10:55:51 0  2  524