Scala functional programming under functional data structure

previously on Guide to functional programming in Scala Scala functional programming (2) introduction to scala basic syntax scala functional programming (3) scala sets and functions Scala functional programming (four) functional data structure 1.List code analysis The content introduced today is mainly to supplement the scala functional data st ...

Posted by stev979 on Thu, 19 Dec 2019 03:45:09 -0800

Timer Program Design Sharing

Timer Programming Sharing Timer Program Design Sharing 1. Background The timer program referred to in this paper is not a narrow timer program, but a general way to achieve certain business scenarios through the timer trigger program, combined with the database. 2. Scheme Analysis 3.1 Scene 1 3.1.1 Requirements We need to push comp ...

Posted by KGodwin on Wed, 18 Dec 2019 23:37:24 -0800

php uses the Symfony EventDispatcher component

Hello, this article will introduce the use and implementation of Symfony's EventDispatcher component through examples from my actual development work. This component is very useful in the actual development process. It can make the business logic of the code very clear, increase the reusability of the code, and greatly reduce the code coupling ...

Posted by digitalbart2k on Wed, 18 Dec 2019 22:06:12 -0800

Summary of AOP Face-Oriented Programming for SpringBoot

1. What is AOP Aspect-oriented programming (AOP), also translated as Aspect-oriented programming and Profile-oriented programming, is a program design idea in computer science. It aims to further separate cross-cutting concerns from business entities to improve the modularity of program code.By adding an additional Advice mechanism to the exis ...

Posted by PRSBOY on Wed, 18 Dec 2019 20:50:06 -0800

PHP uses yansongda/pay to pay Alipay and WeChat

Pay This document is v2.x version, if you want to find v1.x version document, Click https://github.com/yansongda/pay/tree/v1.x Note: v1.x is incompatible with v2.x version After developing Alipay and WeChat Payments several times, it is natural to have a feeling of disgust and inertia. I want to find the wheel related on the internet, but I ...

Posted by MarcB on Wed, 18 Dec 2019 19:59:07 -0800

leetcode-53-maximum subarray-java

Topics and use cases package pid053; /*Maximum suborder sum Given an integer array nums, find a continuous subarray with the largest sum (subarray contains at least one element), and return its maximum sum. Example: Input: [- 2,1, - 3,4, - 1,2,1, - 5,4], Output: 6 Explanation: the sum of continuous subarrays [4, - 1,2,1] is ...

Posted by bluejay002 on Wed, 18 Dec 2019 14:25:45 -0800

Writing a progress bar on Linux

I. concept of progress bar The progress bar is the real-time display of the processing speed, completion, the size of the remaining unfinished tasks and the time that may need to be processed in the form of pictures when the computer is processing the tasks, generally in the form of rectangular bars. Several elements of progr ...

Posted by sunilmadhav on Wed, 18 Dec 2019 07:23:06 -0800

Spring Boot integrates Redis

Preface This article will simply integrate Redis based on springboot 2.1.8.RELEASE, which is suitable for beginners Introduction to Spring Boot integrated Redis 1. Introduce redis dependency in pom.xml <!-- Redis rely on --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-s ...

Posted by frans-jan on Wed, 18 Dec 2019 06:32:37 -0800

Command that operation and maintenance must master -- Systemd instruction

I. origin Historically, Linux startup Always used init Process. The following command is used to start the service. $ sudo /etc/init.d/apache2 start # perhaps $ service apache2 start This method has two disadvantages. First, it takes a long time to start. init process is started serially. The next process will be started only afte ...

Posted by mwkdesign on Wed, 18 Dec 2019 02:23:27 -0800

GoLand 2019.3 activate cracking tutorial (permanent)

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 ...

Posted by angel_cowgirl on Wed, 18 Dec 2019 02:20:06 -0800