React - Using useMemo() still causes keyboard input to slow down

I have code like this, which has many input boxes, each input box is used to modify a price value. Since there are a lot of input boxes (3 prices per area and 3 pricing per price), to avoid re-rendering everything every time, I used useMemo on the function that updates the input box value, and in ad...

P粉340264283 2023-09-03 17:16:59 0  1  579

Issue with input not showing up in HTML

I just want to make a quarter place to enter numbers between 1-8, it doesn't accept any kind of characters or special characters. Only necessary numbers. However, when I unencode, there is no input. "Can someone help me allow members 1-8? This is what I'm saying: "MhMTSEL//Enter M

P粉043432210 2023-08-01 12:47:42 0  1  464

javascript - js input box word limit problem

js input box limits the number of words in the input box, the following code {code...} In the actual process, the following problems were found, as shown in the figure: In the input method, the letters are displayed first, and then the pinyin of the letters is converted into Chinese characters. Ther...

高洛峰 2017-07-05 10:38:10 0  6  944

Python novice asked about anonymous functions

The first piece of code: {code...} In the input, you can enter an anonymous function like lambda x,y:x+y. Now I feel that typing lambda x,y:x+y is too troublesome. I want to directly write the previous lambda x,y: section. When inputting, directly enter the x+y part...

扔个三星炸死你 2017-06-13 09:24:43 0  3  967

Way to restrict date picker to only accept numbers and hyphens, and restrict other values ​​in Vue

I'm using the vue2-datepickernpm package to handle dates. Date input accepts all letters, numbers and special characters. But I want the input to only accept numbers, hyphens and slashes. I can easily achieve this using normal html input. But how to implement it in date picker? Any help would be gre...

P粉729518806 2023-08-26 14:57:04 0  1  652

javascript - Problems with input positioning in the js front-end of the WeChat applet

1. I wrote a WeChat applet, a Sudoku game, to determine whether it meets the requirements (Sudoku rules) based on the number entered. However, I encountered a problem, how to find the position of the number entered by the user, because the number needs to be converted according to the position. Pass...

天蓬老师 2017-05-19 10:11:40 0  3  753

html5 - The keyboard called by the cordova keyboard plug-in is a numeric keyboard (solution)

My current need is to call the phone's numeric keyboard. The technology used is ionic cordova. Now the input box can directly call the phone's keyboard, but what I want now is the numeric keyboard. I have used type="number", but the input box The two-way data binding is string, so an error...

我想大声告诉你 2017-06-17 09:16:42 0  1  1228

Using jQuery: Add array index value to output

I'm new to jQuery and JavaScript. Managed to get the following code to work, adding a new text input field based on the number selected by the user from the (previous) dropdown select field. <script>$(function(){varinput=$('<inputplaceholder="Enter a name or title..."type="te...

P粉567112391 2023-09-16 09:54:22 0  1  814

javascript - input cursor position is misplaced

In the input box on the mobile phone, use the following code to set the format of the mobile phone number to "000 0000 0000" and add a space in the middle of the mobile phone number. {code...} The personal test is normal, but it will appear on Huawei mate9. Every time when entering the thi...

我想大声告诉你 2017-05-18 11:01:58 0  1  728

javascript - jquery uses the for method to obtain the page attribute value of a repeated name and cannot get help.

The situation is as follows: I have a form that needs to dynamically add input items, and the name of each input item is the same. Since non-null verification is required, consider using jquery to obtain the value of each element and judge it. The code is as follows: $("#reg").click(functi...

PHPz 2017-05-19 10:17:03 0  3  528

webpack packaging jQuery plugin - Stack Overflow

In multiple pages, first use providePlugin to expose jQuery to the global {code...} When referencing the jQuery plug-in, I find that I don’t know what to do. If it is an ordinary js plug-in, just require it in directly. However, some plug-ins have both js, css and pictures. If used in every page...

黄舟 2017-06-26 10:50:32 0  2  868

Migrating to PHP 8.1 - How to fix deprecated passing null to parameter error - Rename build in function

PHP8.1 has deprecated passing null as a parameter to many core functions. My main problem is with functions like htmlspecialchars(php) and trim(php) where null is no longer silently converted to an empty string. To solve this problem without using a lot of code, I tried renaming the original built-i...

P粉420868294 2024-01-10 16:21:21 0  2  529

linux - Problem about gedit not having permission to save in ubuntu

Mine is an ubuntu system under a virtual machine. After obtaining root permissions, I use gedit to create a file. The window will be stuck and I cannot enter the code. I cannot save without obtaining root permissions. I don’t know what to do.

某草草 2017-05-24 11:32:01 0  3  1592

Check if a PHP string consists only of integers

I'm writing PHP code to validate some data entered by the user, one of them is an integer and I'm using $_REQUEST["age"] to get it, when I use gettype($_REQUEST["age"])=="integer" and is_int($_REQUEST["age"]) to check if this value is an integer, both return f...

P粉788765679 2023-09-21 21:52:44 0  2  645

php - Use of undefined constant 0 - assumed ' 0' when using substr

In PHP version 5.6, the substr function is used to intercept strings. The code is as follows {code...} Use of undefined constant 0 - assumed ' 0' appears. The online solution is to modify error_reporting in php.ini to turn off the notice. But what is this essential question? ? like...

迷茫 2017-06-10 09:47:52 0  2  1235

How to convert currency string to floating point number using Javascript

I have a textbox that will have a currency string in it and I need to convert that string to a double precision float to perform some operations. "$1,100.00"→1100.00 This needs to be done on the client side. I have no choice but to keep the currency string as input, but need to cast it to ...

P粉593118425 2023-08-23 22:49:40 0  2  702

javascript - Questions about the jQuery File Upload plug-in

The user uses the input="file" tag to select a picture. After I draw the picture selected by the user to canvas for processing, I get the base64 picture data. Then the question comes, how do I put this result into jQuery File Upload, and then click the button What about uploading? {code......

淡淡烟草味 2017-06-10 09:49:07 0  1  655

python - When I use pip install -r requirements.txt to download, why can some parts be downloaded and some cannot?

I built a set of pypi sources myself. When I enter urld on the computer, the contents are all there. However, when I download it in the Linux virtual environment, some parts cannot be found. The missing parts can be found in the source. The error message is: because of HTTP error 403 Client Error: F...

给我你的怀抱 2017-06-22 11:51:37 0  1  1148

The rewritten title is: VueJS Typescript v-model type 'number' cannot be assigned to type 'Nullable<string>'

So I'm very new to Typescript and VueJS and all their new features. Everything works as expected, but I can't get rid of the typescript errors and use v-model at the same time. I'm developing a network view for members to inspect and change their properties. I get member data from API and store it i...

P粉863295057 2023-08-25 13:27:11 0  1  606

How to automatically replace predefined tags

I have some characters that need to be replaced as above, but I don't know how: Characters to replace: first|end|<day>||<red>|</red>|<a###>|</>| day => Get the current date (eg: 14) Red => Color red link => Link input: Hello Mr. Siro Output: Hello Mr. Siro My c...

P粉330232096 2023-09-03 12:43:03 0  1  514