• Introduction to the differences between require, load, include and extend in Ruby


    Require, load is used for files, such as RB and so on. Include and load are used to include modules in a file.Require is generally used to load library files, while load is used to load configuration files. 1、require:Load a library and load it only once. If you load it multiple times, false will be […]

  • Environment of Linux system jsp: Apache, Tomcat configuration


    1.operationsystem   RedHat Linux 9.0 2. Required software   Apache 2.0.54 Download address   http://apache.freelamp.com/httpd Download the file httpd-2.0.54 tar. gz   Tomcat5.5.9 Download address   http://apache.justdn.org/jakarta/tomcat-5/v5.5.9/bin/ Download the file jakarta-tomcat-5.5.9 tar. gz   Mod_jk 1.2.14 Download address   http://apache.justdn.org/jakarta/tomcat-connectors/jk/source/jk-1.2.14/ Download the file jakarta-tomcat-connectors-1.2.14-src tar. gz   Jdk 1_5_0_04 Download address   http://java.sun.com/j2se/1.5.0/download.jsp Download the file jdk-1_ 5_ 0_ 04-linux-i586-rpm. bin When downloading, save […]

  • Weex loading in IOS Detailed examples of image resources in xcassets


    Weex loading in IOS Detailed examples of image resources in xcassets preface: Because The image resources in xcassets can only be loaded through the imagenamed: method, so some special processing needs to be done before they can be provided to weex for use (PS: it is purely entertainment. Because of the cross platform characteristics of […]

  • JWT identity authentication (with source code explanation)


    [TOC] JWT (Jason web token) verification (with source code explanation) One day, it’s the lunch break The chief soldier passed by the fat Sir seat and was surprised. Today, the fat Sir didn’t snore, but was staring at a book with his head down The chief soldier looked closer and fat Sir was reading history […]

  • Introduction to Oracle database (I)


    Database classification 1、 Database classification 1. Small database: access, FOXBASE; 2. Medium sized databases: Informix, SQL server, MySQL; 3. Large databases: Sybase, DB2, Oracle. 2、 How to reasonably use the database in the project can be based on the following three aspects: 1. How large the load is, that is, how many households are used; […]

  • Lua5. Method of loading DLL Dynamic Link Library in 1


    1、 Load an extension DLL written specifically for Lua Use require or package The loadlib method is not explained here. 2、 Load an extension DLL that is not written specifically for Lua “Not an extension DLL written specifically for Lua” means that the DLL does not export the interface in the form of lua registered […]

  • Loading animation implemented by CSS3


    Realization effect Implementation code <h1>developpaer</h1> <h3>JB51.net</h3> <div class=’loader loader1′> <div> <div> <div> <div> <div> <div></div> </div> </div> </div> </div> </div> </div> <div class=’loader loader2′> <div> <div> <div> <div> <div> <div> </div> </div> </div> </div> </div> </div> </div> <div class=’loader loader3′> <div> <div> <div> <div> <div> <div></div> </div> </div> </div> </div> </div> </div> <div class=’loader loader4′> […]

  • Daily soul ask – what is JWk? Implementation principle


    JWT (Json web token) Authentication mechanism based on token JWT consists of three pieces of information headerThe field name of the declared algorithm is alg, and there is also a typ field, which can be JWT by default payloadThe payload is the message body, where the actual content, that is, the data declaration of the […]

  • How to prohibit loading the specified partition when starting MAC in dual system


    Many Mac users have dual systems installed on their computers, but when they start, the Mac will partition all partitions, that is, all systems will be loaded. But what if we just want to load the MAC system? Let Xiaobian help you solve this problem. resolvent: First, we need to know the “universal unique ID” […]

  • Jqery Ajax — an example of the load () method


    1、 Load () method (simplest)load(url,[data],[callback]) URL: the address of the loaded pageData: optional. The format of the data sent to the server is key / valueCallback: optional, callback function1. Simplest application Copy codeThe code is as follows: <!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”> <html xmlns=”http://www.w3.org/1999/xhtml”> <head> <meta http-equiv=”Content-Type” content=”text/html; charset=utf-8″ /> < title […]

  • Android implements a simple loading progress bar


    This example shares the specific code of simple loading progress bar for Android for your reference. The specific contents are as follows 1. Renderings 2. Customize ProgressBar package com.example.myapplication7; import android.animation.ValueAnimator; import android.content.Context; import android.content.res.TypedArray; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.RectF; import android.os.Bundle; import android.os.Parcelable; import android.util.AttributeSet; import android.view.animation.AccelerateDecelerateInterpolator; import android.widget.ProgressBar; import java.lang.annotation.Retention; […]

  • How to view the average load of the system through linux commands


    1. The concept of average load of Linux system Sometimes we feel that the system response is very slow, but we can’t find the reason. At this time, we need to check the average load to see if there are a large number of processes waiting in the queue. The average number of processes in […]