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Transferred from: Micro reading (www.weidianyuedu.com) Micro reading - complete collection of model articles - a website for free learning knowledge 1, Use of asynchronous requests in Spring Boot** 1. Asynchronous request and synchronous request Synchronization request Asynchronous request Features: you can first release the thread ...

Vim editor and Shell script Three modes of Vim Command mode: control cursor movement, copy, paste, delete and search text. Input mode: normal text entry Last line mode: save or exit the document and set the editing environment. Commands commonly used in command mode dd delete(shear)Whole line of cursor 5dd delete(shear)Line 5 from the cursor yy ...

recursion The concept of recursion Recursion is a method to solve a problem. It starts from solving each small part of the problem to solving the initial big problem. Recursion usually involves calling the function itself, directly calling itself, or indirectly calling itself, which are recursive functions. Like this: // Call itself directl ...

1. The origin of C + + For complex problems, large-scale programs that require a high degree of abstraction and modeling, C language is not appropriate. In order to solve the software crisis, in the 1980s, the computer community put forward the idea of OOP (object-oriented programming), and the object-oriented programming language cam ...

Sample imbalance in binary SVC: an important parameter class_weight For the classification problem, one of the pain points that can never escape is the sample imbalance problem. Sample imbalance refers to a class of labels in a set of data sets   It accounts for a large proportion, but we have the situation to capture the needs of a speci ...

@Warehouse notesDetailed explanation of data warehouse and data mart: ODS, DW, DWD, DWM, DWS, ADSProject requirements and architecture design of shangsilicon Valley digital warehouse practice 1Shang Silicon Valley digital warehouse actual combat 2 digital warehouse layered + dimensional modelingConstruction of 3 digital warehouses in shangsilic ...

1. Syntax of mapping file XXMapper.xml: <mapper namespace="cn.kgc.mspper.UserMapper"> <select id=" findCount " ... ...... </select> </mapper> 1.1 namespace: namespace The name of a namespace must have the same name as an interface 1.2 id: unique identifier in namespace** The method in the interface corresponds to ...

Preorder non recursive (stack implementation) Algorithm idea: Access the root node to the left and down in turn, and then immediately put the node on the stack (until the left child is empty);When you get to the bottom left, the top element of the stack goes out of the stack and turns to the right subtree (judge whether the right child is emp ...

0. IntroductionMybatis mate is an mp enterprise level module. It supports sub database and sub table, data audit, data sensitive word filtering (AC algorithm), field encryption, dictionary writeback (data binding), data permissions, automatic generation of table structure, SQL maintenance, etc. It aims to process data more quickly and gracefull ...

Model introduction Prototype Pattern is used to create duplicate objects while ensuring performance. This type of design pattern is a creation pattern, which provides the best way to create objects. In a software system, it is sometimes necessary to create a certain type of object many times. In order to simplify the creation process, you can ...