gage r r study

Git Study Notes (1), Git Study Notes ( Version Control System Overview A version control system is a system that records changes in the content of several files for future reference to specific version revisions. The system can not only control the version of text files of software source code, but also control the version of any other types of files. With the version control system, we can trace a file bac

Linux O M Study Notes-MySQL storage engine introduction, Study Notes mysql Chapter 2 MySQL storage engine I. MySQL common Engines MyISAM, InnoDB, HEAP (In-Memory), and NDB (clustered) Ii. Architecture of MySQL plug-in storage engine Iii. Two most common MySQL engines: MyISAM and InnoDB 1. MyISAM: Table-Level Lock. transactions are not supported. Performance is emphasized, and the execution speed is faster

Less Official Document study notes, less document Study Notes LESS is an extension of css. Its editor is based on node. js's less. js, which compiles less files into css files (which can be compressed ). Concept: Variable:Define a variable to replace a value. It can only be compiled once, and is essentially a "constant ". For example: @color:#ffddee;body { background-color:@color; } The output resul

, Linux with/as Root os.path.isfile () # Determines whether the file Os.path.isdir () #判断是否是目录os. Path.join (r "C:", R "/a.txt") #组合并返回这个路径os. Path.getatime () # Gets the last access Time Os.path.getmtime () #获取最后修改时间sys. version# Gets the version information Sys.stdout.write () #刷新, has spoken Sys.exit (n) #退出sys. argv# Can read the parameters after the script, such as Python 1.py 12345, will be the 12345 parameters read out. Import Shutil #copy文件使用shutil. Copyfileobj (SRC,DST, length=10) #copy

character to the corresponding UCS2 character.This section concludes with a description of the difference between binary strings and non-binary strings that use binary string collations .1. The binary string does not have the concept of a character set. It will be interpreted as a byte, and the comparison is a single-byte numeric code2. Non-binary strings that use binary collations are interpreted as characters and are compared to their numeric character values, which are usually calculated ba

Preliminary Study on WCF-28: concurrency in WCF, Preliminary Study on wcf-28 concurrencyUnderstandingWCFConcurrency mechanism in When you understand the WCF concurrency mechanism, you mustWCFPreliminary Study-27: WCFInstantiation inUnderstanding, because the concurrency feature in WCF is implemented along with the context of the Service instance. The instance

A Preliminary Study on the permission design and a preliminary study on the permission Design For large and small projects, we need to design permissions. We all want to design a general permission and make the permissions more complex. Now we have understood the design concept of the relevant project and think the design is very simple, however, the implementation methods and ideas are intriguing. This art

Theano Study Notes (3)-graph structure, theano Study Notes Graph ures is the basis for understanding Theano's internal working principles. The core of Theano programming is to express mathematical relationships with symbol placeholders. Components of the graph Structure This code is implemented: importtheano.tensor as Tx= T.matrix('x')y= T.matrix('y')z= x + y Variable node (variable nodes) Red. All var

Linux Study Notes and linux Study NotesLinux Study Notes 1. Common commands Command storage. Which commands can be executed? Root: /Sbin/Usr/sbin All users: /Bin/Usr/bin Bin -- binaryBinary filesLinuxAll files are binary files.Usr-userSbin-super binary File Processing Command 1 Ls The list fun

Linux Study Notes 2-linux basic commands and Study Notes 2-linux First blog: linux Study Notes 1-ubuntu installation and basic settings, has introduced how to install the linux operating system and some basic settings and modifications. This blog introduces some basic Console Commands in linux. ========================================================== ====== C

Study Notes, study notes coverI. What do I need to pay attention to when using NSTimer? 1. Make sure there is an active RunLoop.NSTimer is a timing mechanism based on RunLoop, which involves the knowledge extension of the default main thread and sub-thread RunLoop, and the knowledge point to prevent timer failure when the page slides:Solution: [[nsunloop currentRunLoop] addTimer: timer forMode: nsunloopcomm

Mongodb Study Notes 03. mongodb Study NotesMongodb Study Notes 03-query expression Not equal to, greater than, less ! =: Db. stu. find ({name: {$ ne: 'billvsme '}) name is not 'billvsme' >: Db. stu. find ({age: {$ gt: 18}) older than 18 >=: $ Gte In/not in/all $ In: db. goods. find (stu_id: {$ in: [93001,93002, 93003]}) Student ID: 93001, 93002, or 930

Directory: Research on Somatosensory interaction and Kinect-Basic Study on Somatosensory interaction airkinect-Case study 1 Study on Somatosensory interaction airkinect-Case 2 Case 1: Objective: To implement the interaction between air production and control by Using Kinect. When the Mobile Virtual Control moves to "play a video" and "sandbox Experience", water

In-depth analysis of PHP infinitus classification case study, analysis of php Case Study In normal development, the problem of infinitus classification is more or less inevitable, because efficiency, logic and other problems have always made these problems more acute. Today, we will take the yii2 framework as the basis and the topic infinitus as an example to give a simple solution to this problem. First, w

Original articles, reproduced please specify the source: http://blog.csdn.net/crzy_sparrow/article/details/7392345I am very vegetables, there must be a lot of mistakes, I hope you are not wrong.After looking at the Harris Corner Point Detection, began to study surf corner detection, found quite complex, a moment also only understand the approximate, the understanding of things summed up, so that the next time to further study.Surf Corner detection alg

Mysql Database Study Notes index and mysql Study Notes What is an index: There are two types of SQL indexes: clustered index and non-clustered index. The index aims to improve the performance of the SQL Server system, speed up data query, and reduce the system response time. Clustered index: the logical order of the key values in the index determines the physical order of the corresponding rows in the ta

IBatis. NET development study notes -- make notes and ibatis Study Notes I haven't written the log for a long time, and will start to update it slowly later. I used IBatis in the project, also called MyBatis. During my use, I saw a lot of information on the Internet, but many of them are JAVA configurations, for. NET is too small to discriminate against us. NET development? Hum ...... The production proces

Spring boot Study Notes (entry) and spring Study Notes Introduction: Spring Boot is a new framework provided by the Pivotal team. It is designed to simplify the initial setup and development process of new Spring applications. The framework uses a specific method for configuration, so that developers no longer need to define the configuration of the template. In my words, spring boot is actually not a new f

Java study notes 5-class methods, java study notes 5 -- URL: http://www.cnblogs.com/archimedes/p/java-study-note5.html.1. Method Control Process There are three main process control structures in Java: Sequential Structure Select Structure If statement (two-way selection structure) and switch statement (Multiple-Way Selection structure) Loop Structure For stateme

Java Study Notes 2 -- data type, array, Study Notes 2 -- URL: http://www.cnblogs.com/archimedes/p/java-study-note2.html.1. Data Type Java data types include: Primitive Data Types) Reference type) Java primitive data types are also known as basic data types. They indicate the types of basic data that can be expressed in programs. There are usually eight types. The