8, PlSql programming of Oracle

1. PlSql programming procedure language In the sql statement of database, the common definition of variable condition judgment cycle structure is added to the statement of process 1) . basic grammatical structure declare – declaration part – similar to defining variables begin &nda ...

Posted by jayd1985 on Sun, 29 Mar 2020 09:01:48 -0700

Basic technology of machine vision implemented by python+opencv (edge extraction, image filtering, edge detection operator, projection, license plate character segmentation)

Catalog 1: Edge extraction 1. Threshold segmentation and color reversal of image 2. Edge extraction 2: Image filtering 1. Read the original drawing 2. Mean filtering 3. Median filtering 4. Gaussian filtering 5. Gaussian edge detection 3: Edge detection operator 1. Display the original drawing 2. Reverse the image 3. Image edge detec ...

Posted by kliopa10 on Sun, 29 Mar 2020 05:47:54 -0700

Functional programming with C#3

Preface Today I chatted with someone about LINQ in C#and found that the LINQ I know seems to be different from the LINQ most people know. Why not?In fact, LINQ can also be used to do functional programming. Of course, not to write a few Lambdas and use stream s like Java, even called LINQ, but LINQ is something else. LINQ In C#, I'm sure you've ...

Posted by cuboidgraphix on Sat, 28 Mar 2020 10:24:28 -0700

The use of BeanListHandler interface in DBUtils

Original link: http://www.yiidian.com/dbutils/dbutils-beanlisthandler.html org.apache.commons.dbutils.BeanListHandler is the implementation of the ResultSetHandler interface, and is responsible for converting all records at the ResultSet result level to the List collection of JavaBean s. This class is thread safe. 1 syntax for beanlisthandler L ...

Posted by codygoodman on Sat, 28 Mar 2020 07:55:12 -0700

docker+springboot+rabbitmq to implement dead letter queue

1. Download and start rabbitmq docker pull hub.c.163.com/library/rabbitmq:3-management docker run -d -p 5672:5672 -p 15672:15672 --name mymq hub.c.163.com/library/rabbitmq:3-management #web access path ip:15672 #User name: guest password: Guest 2. Introduce dependency into the project of springboot <dependency> < ...

Posted by Wolverine68 on Sat, 28 Mar 2020 07:31:46 -0700

sublime shortcut keys and settings configuration - jetbrains habits

start After many small partners use jetbrains series editors and use lightweight sublime, some settings and shortcut habits may not be suitable Today, Xiaobian will give you some common sublime settings and shortcut key configurations Set up { // Color theme "color_scheme": "Packages/Color Scheme - Default/Monokai.sublime-color-scheme", ...

Posted by hunna03 on Fri, 27 Mar 2020 09:17:59 -0700

Three ways to enable threads in Android

Three ways to enable threads in Android In multithreaded programming, we often use three classes: handler, thread and Runnable. Do you know the relationship between them? First of all Android The minimum unit of CPU allocation of is Thread, and Handler is generally created in a Thread, so Handler and Thread are bound to each ...

Posted by access9 on Fri, 27 Mar 2020 08:00:45 -0700

C × basic knowledge series - 3 set array

Let's briefly introduce the collection. Generally speaking, it's a scheme used to store multiple data. For example, we are a company's warehouse management. The company has a lot of goods that need to be managed. There are similar goods and different kinds of goods. In a word, they are many and messy. If we manage the warehouse according to th ...

Posted by trooper on Fri, 27 Mar 2020 05:51:47 -0700

Java integration Alibaba big fish

Next, we learned the message service of Alida fish This article integrates it into the code 1. Use API to send SMS Step 1: view help documents Ali big fish API https://help.aliyun.com/product/44282.html?spm=5176.12212976.0.0.15b31cbeK3Pm5Y Step 2: determine the code in Java development Example demo https://help.aliyun.com/document_detail/ ...

Posted by jabba_29 on Fri, 27 Mar 2020 03:57:42 -0700

Three methods of JS array de duplication

Thank you for your reference- http://bjbsair.com/2020-03-27/tech-info/7084/ There are many ways of array de duplication. Let's take out three simple ways to learn; 1. Double FOR loop (compare the current item with each of the following items, focusing on the optimization of array collapse and split deletion) 2. Key value pairs of objects 3.in ...

Posted by bharanikumarphp on Fri, 27 Mar 2020 03:56:00 -0700