How to update multiple states in Localstorage object React

So I already have a localStorage hook that retains state, but now I want to update two items in the object which is to add the updated function const{data,setData}=useLocalStorage();constaddWorkExperience=()=>{letadditionJob={. ..data,jobExperience:[...data.jobExperience,{city:""

P粉696605833 2023-09-14 11:49:00 0 1 259

Manually copy a MySQL 5.5 database to another computer

The product my company uses uses MySQL5.5 as the backend database. The product automatically installs and configures MySQL during the installation process. The product can be configured to operate in a hot standby redundant configuration. In these cases, perform the same installation process on 2 se...

P粉588152636 2023-09-05 00:16:59 0 1 310

How does PHP handle the two-dimensional display and submission of colors and sizes in product management?

Dear friends, I recently encountered a problem with the color and size attributes of a product. For example, a product has two colors and three sizes. Product A has a color design [black, white] and a size design [S, M, L]. I want to click on it. The product list comes to the product details page, e...

P粉529965851 2023-06-12 12:01:22 0 1 263

How to conditionally merge two arrays into a two-dimensional array?

I encountered a small problem. The two arrays can be merged so that they can be quickly written into the database, but no matter how they are merged, it is not ideal. I would like to ask. Arrays 1 and 2 are composed of the same key, and the keys are changed to array1 and raary2. Can you please help,...

P粉925529649 2023-02-26 10:20:56 0 1 338

MySQL deduplication, why can only a few hundred or dozens of duplicate data be removed each time, when there are obviously hundreds of thousands of duplicate data?

Requirement: Delete the items with the same primaryid and drugname in DRUG, and keep the smallest row of drug_seq. Question: MySQL uses these methods to remove duplicates. Why can it only remove hundreds or dozens of duplicate data each time? It is like squeezing out toothpaste. Execute it and remov...

P粉029305743 2022-09-05 14:49:26 0 0 565

To implement the addition of PHP, call the addition function of PHP, first assign the values 1 and 2 to id and id1, and then call the addition function. The parameters in parentheses

和 2019-03-28 18:26:18 0 0 710

Combine two Arrays into one json format

Merge two Arrays into one json format, please give me some advice on how to operate: Data: Array ( [0] => Our organization [1] => Recruiting [2] => Sister/Brother, give Do you want something? ) Array ( [0] => As the central organization of the Grand Alliance [1] => Are you ready to de...

DuDuDu 2018-07-25 23:30:11 1 1 1003

javascript - How to make a string automatically add 0 in front of a single digit and only retain two digits of a three-digit number

Get data from the background. If the data is "4", the front desk will display "04". If the background is "04", the front desk will display "04". My code: $(".ball_1").html(data.ball_1>=10||data. ball_1.length=3data.ball_1:'0'+data.bal_1||data....

巴扎黑 2017-07-05 10:53:42 0 4 756

javascript - I always get an error when I write a regex to verify 12.5-20.5?

The required data format is: 1101001-510-50100-5000.510.510.5-2010.5-20.510-20.5. That is to say, the size of the number required for verification is not limited. It can have floating point numbers or not, it can have "-" or not, and one decimal place is retained. This is the regular expre...

typecho 2017-06-26 10:57:35 0 3 718

java-ee - JAVA8 lambdas expression changes the value of external variables

As shown in the picture, I defined an etotalPrice externally, and then tried to change this value in two for loops, but an error was reported to me. How to solve it? (NumberUtil.add and mutiplyu are the basic +*methods of retaining 2 decimal places)

天蓬老师 2017-06-12 09:24:10 0 3 667

javascript - Regular validation of numbers or decimals, definitely a challenge

1. You can only use regular rules to verify 2. When the number is a decimal, you need to verify that two decimal places are retained 3. It cannot be 0, 0.004. It can be a number type such as 0.10, 0.11, 1, 0.01

大家讲道理 2017-05-19 10:16:45 0 6 513

javascript - problem of preserving decimals in integers

I want to keep a number to two decimal places. If there are decimal places, round them off. If there are no decimal places, fill in 0. For example, 1=》1.001.234=》1.231.256=》1.26 I tried using the toFixed function, and its content is correct. But it returns a string, for example 1.00 is a string, whe...

世界只因有你 2017-05-19 10:12:54 0 5 350

Python - The problem of retaining the number of decimal places in numbers

I will perform an operation on each element in [-0.32695389161796801, -0.31471406408825409, -0.31475407980700348] by first retaining 3 digits after the decimal point and then 2 digits after the decimal point, using a method such as round(round(-0.32695389161796801,3),2) , Get [-0.33000000000...

PHP中文网 2017-05-18 10:52:59 0 1 658

laravel - ajax returns decimal display problem

The ajax request returned a decimal. The preview tag in the browser debugging tool is like this: The two decimal places shown above are the same as the database settings, but after consolelog(), there is no decimal point after it: There is no decimal point when displayed in the html. How can I make ...

PHP中文网 2017-05-16 16:49:33 0 2 407

前端 - 封装d3的data.format功能遇到问题

在使用c3.js的tooltip.format.value功能的时候碰到一些问题，需要自己封装一个函数，DOM中直接呈现一个下拉列表，用户可以选择值来设定format有四个选项，$,千位符，精确到小数点两位或者其他位，同时设置$和千位...

高洛峰 2017-05-15 16:56:28 0 1 403

java - 如何准确的将科学计数法表示的Double类型转换为正常的字符串？

1.起因 {代码...} {代码...} 2.我的代码如下： {代码...} 输出结果 疑问 可以看到，我并没有得到想要的结果（123456729.326666），使用*Format之后只保留3位小数，此处不设置#.####等格式是因为并不确定输入的小...

大家讲道理 2017-04-18 10:52:02 0 2 1323

python在命令行中实时输出数据

想做一个简易的数据监控程序，命令行界面。python每秒取数据 展示在命令行中， 但是有两个小需求 不知怎么实现 不想要屏幕滚动输出想把屏幕固定，每秒更新命令行中的数据。 什么思路请指点下？

PHPz 2017-04-18 10:34:10 0 2 351

python - tornado模板如何获取小数点后两位

tornado在取得数据库(MySQL type为float,length为(4,2))后，遇到小数点末尾为0会舍弃，比如11.10只显示11.1，而11.01能完整显示。

巴扎黑 2017-04-18 10:14:38 0 1 307

python - 单词之间只保留一个空格，用replace为什么会出错

在python中，字符串是没有contains函数的，不过可以使用find来代替。现在有一串单词，有的相邻两个单词之间可能不止一个空格，现在我只想保留一个空格，使用下面的办法就是无效的，不知道为什么这样会出现死循环...

PHPz 2017-04-18 10:08:36 0 4 426

Java这个地方把double保留两位小数，为什么会变成这样？

为什么不是0.00， 而是.00？

迷茫 2017-04-18 10:06:13 0 2 215