java - Questions about the primary key of the table

Most primary keys should only be integers (auto-incrementing) or system-generated unique codes (such as UUID); I would like to ask what the pros and cons are of each, and I hope to talk about actual experience.

过去多啦不再A梦 2017-05-17 09:58:34 0  4  697

Why is it a disadvantage that a promise cannot be canceled

Under what circumstances do I need to cancel a promise?

淡淡烟草味 2017-06-15 09:22:29 0  4  915

When does angularjs use ui-router to pull data?

Using ui-router for routing, some pages need to get data from the background when entering. Should I pull the data in the resolve of ui-router, or should I use service to pull the data in the controller of the page? What are the pros and cons of the two methods?

天蓬老师 2017-06-22 11:53:13 0  1  972

What are the pros and cons of svg animation and css3 animation?

RT, in what situations is a transition animation effect suitable for which solution?

曾经蜡笔没有小新 2017-05-16 13:21:17 0  1  679

laravel - pros and cons of php static functions and public methods

Benefits of static functions: 1. Object-oriented 2. Memory-resident, faster 3. Convenient management such as Yii::app()->params[$name]; Benefits of public methods: 1. Convenient calling such as app_param($name ); When setting up a function, how should I choose to create it as a static functio...

typecho 2017-06-26 10:49:16 0  2  890

java - The pros and cons of various methods for fastjson to handle date type conversion

{Code...} Please ask the experts for help, which one has better performance based on accurate conversion under high concurrency?

世界只因有你 2017-06-10 09:48:00 0  1  787

javascript - Please tell me the difference and pros and cons of trigger('click') and click() in jquery.

{Code...} {Code...} Please advise which of these two click event triggering methods is better?

为情所困 2017-06-26 10:58:52 0  3  963

[Must-read for front-end job hunting] Selected front-end development interview questions and answers_Extended questions

What is the most difficult technical problem you have encountered? How did you solve it? What are the commonly used libraries? Commonly used front-end development tools? What applications or components have you developed? How does page reconstruction work? List the features that make IE different fr...

天蓬老师 2017-11-13 13:07:13 1  2  1919

Is there any benefit to establishing multiple database connections for SQL inserts?

I'm writing a project related to massive data acquisition. Currently I'm using .NETFramework4.8 and the Mysql package to initiate connections and insert data to the database server. I will be inserting around 400,000 rows/second. I'm worried that the SQL connection may become the bottleneck of my pr...

P粉585541766 2024-03-30 08:39:46 0  1  384

javascript - Which source code is more suitable for reading and learning, Vue or React? Not talking about the pros and cons of the framework, just from a learning perspective, I hope to know why.

I started learning and using Vue2 at the beginning of this year. Currently, I use Vue2 Family Bucket to develop c-side and b-side at work. In my spare time, I use React for small projects written by myself and my friends. I plan to start reading the source code in the near future to deepen my unders...

迷茫 2017-05-16 13:39:47 0  4  592

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  900

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  782

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  661

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  631

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  1053

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  538

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  734

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  781