rfm analysis

Comprehensive Analysis of $. Ajax () method parameters (recommended), comprehensive analysis of. ajax Let's introduce the Ajax concept first. AJAX is "Asynchronous Javascript And XML" (Asynchronous JavaScript And XML), which is a Web page development technology used to create interactive web applications. AJAX = Asynchronous JavaScript and XML (subset of standard General Markup Language ). AJAX is a technol

JQuery source code analysis and jquery source code analysis One time I was writing jquery plug-ins, I found my js water deep and I was very comfortable with myself. Then we gradually discovered that JavaScript contains some common knowledge points such as prototype, closure, and scope. First, the main structure of jquery source code The following are some notes about jquery source code

back to the beginning of this article, loadmonitoring method, we look at its invocation process, analysis of eventbus related contentif (reload) { Eventbus Eventbus = new Eventbus (agentname + "-event-bus"); Pollingpropertiesfileconfigurationprovider Configurationprovider = New Pollingpropertiesfileconfigurationprovider (AgentName, configurationfile, Eventbus,); Components.add (Configurationprovider);

Mysqlslowlog is a log tool used to record SQL statements that have been executed for a long time (beyond long_query_time seconds ). Mysql slow log is a log tool used to record SQL statements that have been executed for a long time (beyond long_query_time seconds ). Enable slow log There are two ways to enable: 1, in my. in cnf, log-slow-queries [= file_name] 2 is used to specify the five items compared by the -- log-slow-queries [= file_name] option when the mysqld process is started. Mysql

This tool is a real-time analysis of the SIP Communication Protocol, which is the main function of the Communication Engineering of zhongzheng University. In addition, the distributed design can be used to analyze cross-domain sip packets, draw a complete signaling flowchart, and control the web interface... background in view of the fact that there is no free communication protocol analysis software for th

Analysis of the 10 most common mistakes in PHP programming 10 Currently learning PHP a lot of friends, in peacetime daily program development project always encounter a variety of problems, this experience will introduce PHP development in the 10 most common problems, I hope to be able to help friends. Error 1:foreach left hanging pointer after loop In a foreach loop, if we need to change the elements of an iteration or to improve efficiency, applyin

Analyze the data object ing mode in php design mode, and analyze the design mode. Analysis of the data object ing mode in the php design mode, analysis of the design mode in php there are many different models, here we will introduce you to a non-commonly used data ING analysis of the data object ing mode in the php design mode. There are many different design m

Analysis of various methods for creating objects in javascript, analysis of javascript Recently I was reading javascript advanced programming (version 2) Create an object in javascript • Factory Model • Constructor Mode • Prototype • Constructor and prototype • Prototype dynamic mode Most object-oriented languages have the concept of a class. You can create multiple objects with the same methods and attribu

HMaster startup code analysis for source code analysis of HBase1.0.0 (2), hbase1.0.0hmaster In the previous blog, my code analysis is the startup function of the startMaster core. This article mainly analyzes the corresponding components involved in the specific HMaster construction process and the startup of services, this article mainly analyzes the process. Th

JavaScript custom wait function instance analysis, wait instance analysis This example describes how to use a custom wait function in JavaScript. Share it with you for your reference. The specific analysis is as follows: The following is a js custom wait function that can suspend program execution. Function sleep (delay) {var start = new Date (). getTime (); w

DSYM file analysis tool and dsym analysis tool After arriving at the new company, I have been busy some time ago. Recently, the project was successfully released and launched. Recently, I have been optimizing the project and eliminating some bugs in online software, because umeng statistics are used in the project, the error information statistics provided by umeng can be used to easily find the client exce

R language and data analysis [quarter 1st], Data Analysis Today's computer systems need to process a variety of data types and filter data for deep understanding. At the same time, open-source applications are becoming increasingly popular, all of this is changing the language R used for statistical analysis and visualization. With the development of the times

SQLite tutorial (5): Index and data analysis/cleanup, sqlite Data Analysis I. Create an index: In SQLite, the SQL syntax for index creation is basically the same as that of most other relational databases, because here is just an example usage:Copy codeThe Code is as follows:Sqlite> create table testtable (first_col integer, second_col integer );-- Create the simplest index, which is based on a field in a t

Basic JavaScript function _ in-depth analysis of variables and scopes, and in-depth analysis of javascript Function Definition and call Define a function. In JavaScript, the method for defining a function is as follows: function abs(x){ if(x >=0){ return x;}else{ return -x;}} The abs () function is defined as follows: Function indicates that this is a function definition; Abs is the name of the function; (X

Analysis of JS dynamic creation elements [two methods], analysis of js dynamic two methods Preface: There are two ways to create an element 1) concatenate the elements to be created into strings. Locate the parent element and assign values to the innnerHTML of the parent element. 2) use some functions provided by Document and Element objects to dynamically create elements (create Element => Find parent Elem

Window. onerror () usage and instance analysis, and carchive usage instance analysis Onerror syntax usage Onerror has three input parameters by default: • Msg: error message• Url: The file where the error is located• Line: the code line of the error, which is an integer.Window. onerror = function (msg, url, line) {// some code };For the form of In js, we usually use js fault tolerance. window.onerror=funct

Analysis on the causes and solutions for getting errors in DIV content, analysis of div causes 1. Error description 2. Error cause Because the element is added to the div, append () is used (); $ ("# DivStyle"). append (" The append contains dynamic data. When the request data is empty, obtain and determine the content in the div: Var divContent = $ ("# divStyle" ).html (); if (divContent = null | d

[Cainiao crazy UML series] -- Analysis of four types of UML relationships and Analysis of uml In UML, a link is very important. It abstracts the links between objects and forms a link structure. The following describes the four types of relationships in UML: Association, dependency, generalization, and implementation. I. Examples 1. Association) An association is used to connect objects with structural rela

InnoDB RR isolation level insert select two deadlock case analysis, innodb Case Analysis Author:Gao Peng (Eight monsters in Chongqing) School draft:Master Ye (some content is fine-tuned) Original article: http://blog.itpub.net/7728585/viewspace-2146183/ Some netizens encountered A deadlock in insert A select B where B. COL = ** at the RR isolation level. After analyzing the deadlock log, I have simula

From today on, I will start learning redis source code. The redis code is relatively small and very suitable for learning. It is a very good learning material, it looks like about 100 files, which are written in C language. I hope I can finally get rid of him. I don't need the C language for a long time and I will forget it. The first step in source code analysis is to look at the source code structure from where to start. You can browse the source co