The length of varchar storage in mysql

Sorry, English is not my native language... :( I wanted to understand how the actual length of varchar is stored in mysql.ibd file. So I decided to make a test like this: CREATETABLErecord_format_demo(c1VARCHAR(10),c2VARCHAR(10)NOTNULL, c3CHAR(10),c4VARCHAR(10))CHARSET=asciiROW_FORMAT=COMPACT;INSERT...

P粉455093123 2024-04-01 15:50:34 0  1  378

length attribute in js function

For custom functions: function fun(a,b) { {code...} } Print the window object in the chrome development tool and find that there is a custom function fun and its own function getComputedStyle. The formal parameters of the fun function are Two, so the length attribute is 2, and the getComputedStyle f...

曾经蜡笔没有小新 2017-06-14 10:53:55 0  2  994

How to control the length of page-header?

page-header length control

。 2018-05-31 22:17:03 0  1  1332

javascript - safari cannot get the duration of the video.

Safari cannot get the duration of the video. Is there a good solution for Infinity?

phpcn_u1582 2017-06-05 11:12:52 0  2  896

mysql optimization - If a mysql table cannot ensure that the field column lengths are consistent, does it not need to use char?

In a data table, if the length of each data column is fixed, then the length of each data row will also be fixed. As long as there is a variable length of data column in the data table, then the length of each data row will be fixed. The lengths are all variable. If the length of the data rows in a ...

PHP中文网 2017-05-24 11:33:08 0  1  724

How to get duration of video in php and javascript?

I want to get the duration of the video when the user uploads the video. I don't want to put the video tag into the html. I want to get video duration code in php and javascript or jquery. Thanks

P粉604669414 2024-01-29 14:23:20 0  1  419

Find a front-end UNIAPP to help adapt the APP. It is best to have someone local in Changsha who can cooperate with you for a long time.

Find a front-end UNIAPP to help adapt the APP. It is best if it is local in Changsha. It can be used for long-term cooperation. Currently, it can only be billed by project or part-time. The current task is to adapt the front-end and small programs and optimize it. It is best to contact vx:crw689, a ...

@A~旺仔 2022-04-11 12:27:02 0  1  1150

javascript - WeChat same-screen player, long press on the QR code cannot be recognized

When using the same-screen player to play in WeChat, the QR code floating on the player cannot be recognized by long pressing; after exiting the same-screen playback, the QR code can be recognized

伊谢尔伦 2017-06-05 11:13:03 0  1  1029

Rectangle problem

Can I use manual drag to control the X or Y or height and width of the rectangle?

小民 2019-06-12 10:09:12 0  0  1121

Is there a length limit to self-growth?

The maximum value of SQL is not more than 60,000. What should I do if the self-growth exceeds this value?

斯柯达胡 2020-07-04 11:10:00 0  0  921

php - Post upload file, content-length does not match the actual obtained size

The form uploads a file, {code...} but the body contains encoded data {code...} and the Content-Length does not match the actual body length. So if I upload a large file, such as 5M, I will The client wants to read 1M in a loop, what should we do?

天蓬老师 2017-05-18 10:45:25 0  1  830

Unable to get length value of array in Node Red JavaScript

I want to know the length of an array read inside a function in NodeRed using JavaScript, but it doesn't display/return any value. Can anyone help me? This is the code inside the function block in Node-Red letj=0;letarray1={payload:msg.payload};j=array1.length;returnj;I don't see any return value fo...

P粉216807924 2024-01-28 22:21:45 0  1  523

Alignment of tables only involves alignment, not size, length, width, and background color.

Alignment of tables only involves alignment, not size, length, width, and background color.

古。。 2019-01-18 14:42:28 0  2  1119

javascript - Why can't the length of data be read in the template after using art-template?

Why can’t the length of data be read in the template after using art-template][2]

淡淡烟草味 2017-07-05 10:38:54 0  1  926

Validating phone number length using jquery doesn't work

I'm trying to validate the phone number length using jquery, when the user starts typing themselves it should show, I executed the following code: functionvalidatePhone(phone){if(phone.value.length<=10&&phone.value.length>= 5){letvar='Yes';returnvar;}else{letvar='No';returnvar;}}fun

P粉520545753 2024-03-30 11:39:59 0  1  460

Why can't PHP maintain a long connection when using Sever-Sent Event? Instead, it disconnects immediately after returning data.

As the title states, when PHP uses SSE, every time the connection is successful, data is returned, and then the connection is interrupted. Originally, SSE should maintain a long connection, and then return new data to the front end if the data changes. Why can't you maintain a long connection? The b...

无乐 2020-01-03 17:05:25 0  0  1014

Can the length of the key be set for the sortset ordered collection in Redis?

I want to achieve the effect of ranking the top 100 in real time. When the number of places reaches 100, the 101st data will be automatically sorted when added to the sortset collection, but the 101st one after sorting needs to be deleted by coding. Does sortset have the function of limiting the key...

phpcn_u1582 2017-05-16 13:18:20 0  1  889

Why does the PHP output parsed by fastcgi in nginx and apache output length information in the header and tail?

Why does the header and tail output length information when PHP parsed by fastcgi in nginx and apache is output? In the figure below, the 30e at the beginning and the 0 at the end are both added, and static pages will not be added.

PHP中文网 2017-05-16 17:04:40 0  1  571

markdown - How to quickly fill characters of a specific length in vim?

When using vim to write rst (reStructuredText) documents, I encountered such a demand. In rst syntax, the next line of the title needs to be filled with ====. {Code...} I want to quickly fill in this paragraph ====, and the length is the length of the title of the previous line.

怪我咯 2017-05-16 16:38:49 0  1  658

How to get the total length of an array in Vue.js

I'm trying to get the total result length but I'm not getting anything in the template

P粉908138620 2023-07-27 21:43:09 0  1  663