Using an extremely long List in Python results in excessive memory usage

I need to use a List with a length of more than 500,000 in a program, but the result is that the memory usage increases instantly. What method should be used to optimize it?

扔个三星炸死你 2017-07-05 10:51:29 0  1  1498

javascript - The loading animation effect of the page is not displayed?

1. The project I am working on now is a data table page. Since the background query takes a long time, in order to improve the user experience, a load animation is added. There is no problem with the plug-in for loading animation. However, during the execution of the method, it is found that the ani...

迷茫 2017-05-19 10:18:28 0  4  727

Align decimal points of numbers in table with pseudo "center" alignment appearing in cells

I want a table with a column of decimal numbers, with different lengths before and after the decimal point, and with the decimal points all aligned. Column widths must be of a "flowing" size, expanding as necessary to accommodate very long numbers in any data cells, or very long headers as...

P粉373990857 2023-10-24 13:01:47 0  1  818

How to prevent Mud Blazor MudTable columns from expanding to fit text

I have a table with 5 columns, one of which contains some very long user IDs (without spaces). Instead of cutting the text off, it expands the column to accommodate all the content, pushing the other columns to the right and causing scrollbars to appear. I've been researching for hours trying to fig...

P粉212114661 2023-12-27 11:05:27 0  1  482

Simplify video playback in emails: ensure instant playback, no download screen required

I'm not sure "which wall to lean the ladder against" here, or even the correct terminology for what I'm trying to do. I have been developing software for an agricultural research company for many years. We have an Android app that performs a number of functions, including uploading field p...

P粉242535777 2024-03-30 17:12:51 0  1  642

Why doesn't VS Code limit each line to a maximum of 80 characters when saving?

I installed the Prettier extension and set the max line width to 80. I also set it up to format on save. When I save the file I'm working on, I find that the comments are still very long. The extension should shorten it to the maximum 80 character width, but it doesn't do that. Do I need to use othe...

P粉129731808 2023-09-16 23:12:08 0  1  790

The website user backend wants to add a column, please give me a solution! ! ! !

The description of the problem may not be professional enough, please forgive me! ! ! I downloaded a set of website source code of the Dream Weaver System from the Internet. I wanted to add a column "Article Publishing" in the user backend column. After searching for a long time, I finally...

大千居士 2020-03-15 11:16:46 0  0  1156

Ways to fix issue 2003 (HY000): Unable to connect to MySQL server 'db_mysql:3306' (111)

I recently tried to containerize my FastAPIPython server (also for replication/doubling purposes). Before, I had just a MySQL server in a Docker container and everything was fine, but when I also made my web server a service, it couldn't connect to the MySQL server, so now the application doesn't wo...

P粉178132828 2023-09-05 11:18:47 0  1  914

Experiment with sorting after query limit

So this is my first question here, please forgive me if something is wrong. I'm trying to make a sort query based on constraints. So there is a Customers table with 90 records. I want to first perform a query limited to 3 records, and then sort the results of this query by a column called ContactNam...

P粉237125700 2023-09-05 14:46:42 0  1  795

CSS Grid: Create new row when child content overflows column width

I have a two column layout based on CSS grid. When the content of the second column exceeds 1fr I want to create a new row. As it currently stands, the content simply overflows the column. One requirement of this layout is that the items in the right menu column are in one row. I achieve this with: ...

P粉212114661 2023-09-05 15:18:28 0  1  673

PHP full text search functionality using AND, OR and NOT operators

Newbie question: I'm trying to implement a full text search on a search string using php and eloquent. $searchstring="+(victimsuspect)+crime-covid";$searchresult=RssItem::whereRaw("MATCH(description)AGAINST('$searchstring'INBOOLEANMODE)")->ge

P粉076987386 2023-09-05 15:06:32 0  1  646

Shortest way to convert all PHP types to string

I'm writing a general system that I hope can one day be applied to fields like medicine (i.e. it's "scientific"). I think the best way is to represent all the data in php with strings (true will be "true", false will be "false" and so on). The reason for this is that in...

P粉369196603 2023-09-05 15:34:44 0  1  1066

How to get average of DATETIME column in MySQL while grouping by other columns

I'm creating and populating a MySQL table using the following query: SETtime_zone='+00:00';CREATETABLEtimestamp_n_datetime(idINT,timeDATETIME,avg_timeDATETIME);INSERTINTOtimestamp_n_datetime(id,time,avg_time)VALUES("1","2023-01-0310:

P粉460377540 2023-09-05 11:46:21 0  1  559

Multi-device (mobile phone) synchronization - React Native

I'm trying to create a Lightshow that will launch on all users' mobile devices at the same time (can have up to 2000-3000 users). All users will use the Internet (Wi-Fi or mobile data). In our FE we use Apollo for subscriptions and it works like a charm. But the problem is, user A can get subscribed...

P粉151466081 2023-09-05 11:58:38 0  1  756

Spades, Diamonds, Hearts, Clubs => styles do not change font color in Chrome for Android

In Google Chrome on Windows, the card suit symbols (spades, hearts, diamonds, clubs) are colored correctly using the "style" attribute. Unfortunately, the same page displayed in Google Chrome on Android does not display the colors I defined but uses the default black and red. (See the atta...

P粉896751037 2023-09-05 15:25:13 0  1  809

How to hide mui TextField label?

I'm developing a Nextjs app and I have a dashboard navigation bar built with mui that contains a notification that opens the notification box, which is built with regular HTML and CSS. dashboard-navbar.js: importNotificationBoxfrom"./notification-box/notification-box";//...exportconstDashb...

P粉239164234 2023-09-05 15:41:00 0  1  744

Custom Bootstrap 5 carousel on mobile (multiple items, but not in one row)

I'm having trouble trying to customize the carousel layout on mobile devices. I want it to show every item of the carousel on mobile instead of just one, but after trying with some CSS and JS, especially using displayfloat or max-witdh I'm just starting to think this isn't possible, Or I don't know ...

P粉763662390 2023-09-05 11:53:56 0  1  642

How to use Firebase Authentication with multiple login methods and role-based authentication?

I am creating a react.js application with nodejs as backend and I want to use these authentication methods to login using email/password, login using google and login using phone, now I want to keep the uniqueness of the user while signing the user's name for Any of these, I will also get other deta...

P粉574695215 2023-09-05 12:18:10 0  1  713