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Self-study IT network Linux load balancing video tutorial

Course Intermediate 11215

Course Introduction："Self-study IT Network Linux Load Balancing Video Tutorial" mainly implements Linux load balancing by performing script operations on web, lvs and Linux under nagin.

Shangxuetang MySQL video tutorial

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Course Introduction："Shangxuetang MySQL Video Tutorial" introduces you to the process from installing to using the MySQL database, and introduces the specific operations of each link in detail.

Band of Brothers front-end example display video tutorial

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Course Introduction："Brothers Band Front-end Example Display Video Tutorial" introduces examples of HTML5 and CSS3 technologies to everyone, so that everyone can become more proficient in using HTML5 and CSS3.

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javascript - What is the maximum compression ratio for canvas compressed images?

In a recent project, images were compressed and uploaded, and canvas was used to compress the images. It was found that canvas has different minimum compression ratios for different images. For the largest 22M picture, the smallest one can only be compressed to about 900k, and the compression ratio is 0.036. And one of the photos (only about 900k...

2017-06-12 09:28:20

javascript - Problems with canvas processing images

I need to use canvas to process a picture uploaded by the user. The size uploaded by the user may be very large, for example, it will exceed the width and height of the current browser window, so I scale it proportionally to the visible area of the browser, and then Draw it onto the canvas, but this is equivalent to reducing the user's picture...

2017-06-10 09:49:16

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 work. Below is the code snippet of the server database initialization connector in the application fromfastapiimportFastAPIimportmysql.connectorapp

2023-09-05 11:18:47

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 ContactName. I think this might be a nested query. Nested queries run fine in SQLServer, but don't know how to implement it in MySQL. Limit query: Select*fromcustomerslimit

2023-09-05 14:46:42

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: .right-menu{...grid-auto-flow:columndense;...} If I remove the grid-auto-flow attribute, the overflow stops. However, the items are now stacked into multiple rows, which is not what I want. I also tried converting .ri

2023-09-05 15:18:28

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PHP implements equal scaling and uploads images

Course Introduction：Sometimes when uploading pictures, the pictures are too large, which not only takes up space and consumes traffic, but also affects browsing (the sizes of pictures vary). Let’s share a method of scaling images in equal proportions without distortion. In this way, no matter how big the uploaded image is, it will be automatically compressed to the range of the size value we set. Tested and proven practical.

2018-03-27 comment 0 1636

PHP image processing function class (watermark, thumbnail) [About proportional compression and cropping compression]

Course Introduction：PHP image processing function class (watermark, thumbnail) [About proportional compression and cropping compression]

2016-07-25 comment 0 969

PHP folder traversal, image compression at equal proportions

Course Introduction：PHP folder traversal, image compression in equal proportions

2016-07-25 comment 0 1186

PHP code for proportional scaling of uploaded image thumbnails

Course Introduction：PHP code for proportional scaling of uploaded image thumbnails

2016-07-25 comment 0 1077

PHP implements proportional compression of image size and size example code

Course Introduction：This article mainly introduces the relevant information about PHP's implementation of equal-ratio compression of image size and size example code. Friends in need can refer to it.

2016-12-28 comment 0 1485

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