The most efficient way to group object arrays

What is the most efficient way to group objects in an array? For example, given the following array of objects: [{Phase:"Phase1",Step:"Step1",Task:"Task1",Value:"5"},{Phase:"Phase1",Step:"Step1",Task: "Task2",Valu

P粉310754094 2023-08-21 14:34:06 0  2  619

php - In mysql, is it more efficient to use int type as a primary key field than char type?

In mysql, is it more efficient to use int type as a primary key field than char type? Due to business requirements, it is necessary to use timestamp + 2 random numbers to form the ID. For example: 149561542040, a total of 12 digits. If the ID field uses integer bigint, will it be more efficient than...

黄舟 2017-05-25 15:08:20 0  2  818

May I ask which one is more efficient?

Which of the following two ways of writing is more efficient? ----------------------------------foreach ($arr as $k => $i){ list($value) = each($arr); echo '<h2 align="center&quo

吴小辰阿 2019-05-13 16:30:05 0  1  1293

Efficiently add global CSS using Nuxt 3 and Vite

I have global sass included in my project, but I can't find an efficient way to add it to the project. There seem to be two popular ways to add css to your project. vite:{plugins:[svgLoader()],css:{preprocessorOptions:{scss:{additionalData:`@import"~/assets/styles/main.scss";`,},},}, using...

P粉256487077 2023-08-25 18:19:44 0  1  525

A typical low-code generation system with separate front-end and back-end, based on Thinkphp Vue ElementUI

This is a typical development framework with separate front-end and back-end, and many front-end and back-end codes can be generated very well without writing code, which greatly reduces the amount of code written by programmers. Improve efficiency and reduce costs! The rapid development system base...

Thinkphp Vue RDS 2022-07-21 08:31:41 0  0  806

Which is more efficient, $("#content .abc") or $("#content").find(".abc")?

Which is more efficient, $("#content .abc") or $("#content").find(".abc")?

天蓬老师 2017-06-26 10:50:26 0  4  958

php - Why do pseudo-static rules have no effect?

I want to convert the following dynamic rules into pseudo-static {code...} My pseudo-static rules.htaccess {code...} Why is this setting invalid?

大家讲道理 2017-05-18 10:46:50 0  2  907

JAVA, how to add 100,000 Int values ​​more efficiently

How to add 100,000 int values ​​more efficiently? I was sorting out the interview questions today and saw this question that had been asked before. If you think about it to no avail, welcome everyone to discuss! I tried it yesterday based on fonxian's answer and found that there is no difference! So...

大家讲道理 2017-05-17 10:02:50 0  2  1058

Build efficient Laravel applications: implement dual API and view functions, and separate controllers

I want to structure my Laravel application so that API and view functionality are handled efficiently while avoiding duplication in controllers. How do I set up my application to have two separate controllers, one dedicated to API operations and another for view-related operations? Also, what is the...

P粉558478150 2023-08-16 10:39:36 0  1  658

Efficient way to fill missing values ​​in unordered map from SQL table (SQL/C++)

Question Currently there is a system that reads unique identifiers (ids) and their attached dataset from a SQL table into an unordered map. The datasets used to start with id1, but adding and removing datasets took about 10 milliseconds. Note that not all datasets will always be loaded into RAM. Whe...

P粉476547076 2024-04-04 11:47:44 0  1  506

Efficiently find the last timestamp within a given time range

The problem is with a hypothetical online store; I'll simplify the data for my specific problem. Suppose there are two tables: one holds the registration date of each customer CREATETABLEcustomers(customerIDint,registerDATE,); and the second holds all the customer's online visits CREATETABLEvisits(c...

P粉232409069 2024-03-22 13:22:08 0  1  660

If PHP uses multi-dimensional arrays, will the efficiency be very low?

When using PHP to do projects, you need to use a data structure to store data, but in PHP, it seems that it can only be stored using arrays. The configuration files of PHP's Laravel and other frameworks all use multi-dimensional arrays, such as: {code...} I think the efficiency of multi-dimensional ...

PHP中文网 2017-06-15 09:22:11 0  7  883

touch : File C:\Users\AppData\Roaming\npm\touch.ps1 cannot be loaded because running scripts is disabled on this system

I'm a beginner learning React and Node.js. When I run the touch 'index.js' command in the server, it says 'touch: Unable to load file C:\Users\sandu\AppData\Roaming\npm\touch.ps1 because running scripts is disabled on this system. For more information, see about_Execution_Policies at https://go.micr...

P粉905144514 2024-03-26 14:48:13 0  1  449

How to make nginx not need to reload, and the upstream configuration can take effect dynamically in real time?

How to make nginx not need to reload, and the upstream configuration can take effect dynamically in real time?

我想大声告诉你 2017-05-16 17:14:48 0  1  619

How to use Vue-Chartjs to dynamically update line charts efficiently?

I have this working code that updates a chart where onMount simulates some kind of update. But completely destructuring the array and rebuilding it with new values ​​in the OnMounted hook doesn't seem very efficient? I have tried using reactive components for data_values ​​and label_values ​​but tha...

P粉460377540 2024-01-29 13:35:31 0  1  565

Will laravel's files not be automatically deleted after the session expires?

I tried it locally and found that the files in storage\framework\sessions will not be automatically deleted after the session expires?

伊谢尔伦 2017-05-16 16:56:00 0  2  581

mysql - efficiency issues of inner join and left join

Under what circumstances will the execution efficiency of inner join and left join be relatively high?

学习ing 2017-06-24 09:41:36 0  2  1867

javascript - js efficient element position replacement

js high-efficiency element position replacement ul {code...} two element position replacement

阿神 2017-05-19 10:38:59 0  1  666

python redis list insertion speed is too slow

{Code...} This kind of execution efficiency is terrible. You need to wait dozens of seconds for the insertion to complete. Is there a more efficient way to handle this? args is just a tuple with content like (1,2,"3")

typecho 2017-06-28 09:21:58 0  1  1322

Perform insert into database to catch duplicate key errors

My application may insert duplicate primary key data, my doubt is what is the most efficient way, to check if the key already exists before inserting, or to just insert and let the bank return an error and then handle it? Which one has less impact? Thanks

P粉920835423 2024-03-28 08:58:51 0  1  433