Aggregate operators of [LINQ standard query operator summary]

LINQ in C ා provides two operation modes: query expression and query operator. All query expressions are replaced by corresponding query operator classes. Query expression is a bit of "class" SQL. When writing SQL in the code, I always feel that it is not "elegant". Using query operators is "elegant". This series i ...

Added by nloding on Sat, 30 May 2020 17:01:17 +0300

vue upload image to base64, binary array, save encoded data to file

functional requirement 1. Picture to base64 2.base 64 to binary array 3. Save binary data to file and download to local resolvent Question 1: reference material vue element upload picture to base64 Specific code getBase64(file) { return new Promise(function (resolve, reject) { let reader = new FileReader(); let imgResu ...

Added by error_22 on Fri, 29 May 2020 17:49:11 +0300

Hegel: aspire to be the best JavaScript static type checker

Yunqi information:[ Click to see more industry information]Here you can find the first-hand cloud information of different industries. What are you waiting for? Come on! As a rookie in JavaScript type checker, Hegel aspires to be the best JavaScript static type checker. It claims to provide a reliable type system with strong type inference. At ...

Added by drakal30 on Fri, 29 May 2020 09:31:34 +0300

Learning C + + DLL injection and interprocess communication

I always think that learning c + + is too complex, and there are many types in it, which are too many to distinguish at all. However, most of the online materials are c + +, and some problems are not solved perfectly with other methods (can be used in c, java, python) Then I decided to do it. Because I had to do c + +, I had to do VC + +, and ...

Added by Virii on Wed, 27 May 2020 07:19:14 +0300

suricata uses pfring to monitor multiple network cards for error analysis and resolution

Problem scenarios We use Suricata for traffic analysis. Suricata is deployed on a 48-core physical machine with a multi-network card. Due to business needs, suricata's network card for monitoring traffic has been upgraded from 5 to 6, enp176s0f1 has been added, and several similar errors have been found in suricata's log: <Error> - [ERRC ...

Added by pandaweb on Tue, 26 May 2020 21:51:27 +0300

JS Array Method Complete

  1. Before using the methods of arrays, you need to create arrays, which can be created in the following ways: Literal Quantity (json) var arr1 = []; //Create an empty array var arr2 = [5]; //Create an array with a single element var arr3 = [5,6,7]; //Create an array with multiple element ...

Added by gprobst on Tue, 26 May 2020 20:21:46 +0300

Detailed explanation of Spring IoC createBean method

preface This article mainly analyzes the flow of the createBean() method of Spring IoC and the bean life cycle. Here is a general flow chart: text AbstractAutowireCapableBeanFactory#createBean @Override protected Object createBean(String beanName, RootBeanDefinition mbd, @Nullable Object[] args) throws BeanCreationException { if ( ...

Added by skippence on Fri, 22 May 2020 13:27:50 +0300

Android Handler mechanism: how ThreadLocal works

1, Handler mechanism and ThreadLocal In the Handler mechanism, we will encounter a very important class in Looper: ThreadLocal, ThreadLocal is not a thread, its function is to store data in each thread. When the handler is created, it will get the Looper of the current thread to construct the message loop system. The way to get it is through ...

Added by PJ droopy pants on Fri, 22 May 2020 08:29:05 +0300

c language version remove source code comments

Note the following points when removing comments in the code First, comments have multiple or single line comments from "/ *" to "* /" Second, there is a single line comment of "/ /" Also note that characters in double and single quotation marks are not included in comments So I designe ...

Added by PHPeter on Thu, 21 May 2020 17:44:02 +0300

Research on WeChat Red Packet Algorithm

Background: Before the New Year relatives were grabbing red envelopes, they all wanted to grab the first one, saying that the sooner the grabbing, the bigger the grabbing.In fact, this must be incorrect. WeChat should have generated all the red envelopes when you sent the red envelopes. So you said that no matter how many people grab them, it s ...

Added by Roble on Thu, 21 May 2020 06:48:23 +0300