Programmer Group

Note: there are many articles about redis seckill system on the Internet. They are all confused. Then they can realize one by themselves, which is also convenient for later study The implementation method is to use the list queue of redis, and the framework is laravel The core part is the pop operation of list. As atomicity, even if many user ...

The use of coroutine and goroutine of golang coroutine's process is released after the trunk is finished, and other processes are executed Automatically exit after goroutine's trunk ends When the coroutine process of swoole is used, if a dead loop is used, the trunk is running all the time, and resources will not be released. Therefo ...

Phpstorm is a coding integrated development tool that most PHP programmers can't help but love. It supports all PHP language functions, providing the best code completion, refactoring, real-time error prevention and other functions. But for some new PHP users, there is always a question: is phpstorm free? Obviously, this problem is known to al ...

Note: this tutorial patches, activation code collection and network, if there is infringement, please contact the author to delete! On November 28, 2019, JetBrains released Go's strongest editor, GoLand, March 2019. This update software consumes less CPU and faster performance, enhances support for Go Modules, adds a new set of quick fixes, and ...

1. List command used command Effect lPush Insert one or more values into the list header rpoplpush Pops up the last value of the list, inserts it into the header of another list, and returns the value lRem Delete the given value in the list lIndex Get values in the list by index 2. Composition of the queue Name Duty Producer ...

1.Transaction command command Effect Return value watch Monitor one or more key s Always OK multi Declare the start of the transaction, and subsequent commands will be queued for exec execution in order Always OK exec Execute the command after multi in sequence. If the value of the key monitored by the watch command before multi change ...

Actually, everyone in PHP should have heard of bootstrap, right, but some friends were confused by bootstrap's so-called response when they first contacted. Today we're going to talk about bootstrap's simple build page. All you need to do is you have the basic knowledge of HTML and the so-called official manual. It's all done e ...

1. start Thumbnail function is often used in the process of uploading pictures on websites. Here I have written an Image class for Image processing, which can generate thumbnails and add watermarks.   2. How to generate thumbnails The key to generating thumbnails is how to calculate the scaling ratio. Here, based on several common changes ...