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A third-level network is a nightmare for many non-computer students and even computer students. I believe there are many people who participate in various training courses in order to take the test and get the certificates of Level 3 networks. Even after the examination, I got a level 3 certificate, but the rest is almost blank, that is, after passing the examination, there is nothing left in my mind. A few

3. in-depth understanding of LaravelEloquent (3)-Inter-model relationship (association) in-depth understanding of Laravel Eloquent (3)-Inter-model relationship (Association) In this article, I will join you in learning the most complex and difficult part of Eloquent-the relationship between models. The official English document is Relationships. I personally thin

Layer-3 extension layer-7, layer-3 layer-7 In the process of data center cooperation, the idea of three layers (UI--BLL--DAL) is used to expand to seven layers, and SVN is used for cooperative development. During development, data transmission and method calling are all important and frequent. Because of the frequency, chaos is inevitable without planning and management, and it also results in a huge work

CSS 3 animation introduction, CSS 3 Animation Original article: A Beginner's Introduction to CSS Animation A beginner's introduction to CSS Animation Translator: dwqs Nowadays, more and more websites use animations in various formats, such as GIF, SVG, WebGL, and background videos. When the animation is used properly in the web, it can inject vitality and good interaction into the website, and provide use

Cordova 3.x BASICS (3) -- debug the debug tool (1) ripple emulatorIt is a mobile application Simulator Based on Google Chrome and has been donated to ASF. Apache ripple: http://ripple.incubator.apache.org/Chrome WebStore installation address:Https://chrome.google.com/webstore/detail/geelfhphabnejjhdalkjhgipohgpdnocInstall ripple emulator Reference NPM install-G ripple-emulator Create an android test proj

Section 3 analyzes the SWT Design Principles Returned directory In the first chapter, we have introduced that SWT uses the local control library provided by the underlying operating system. It is only a Java interface for the interaction between the program and the underlying system. The lifecycle of a local control is like a mirror of a Java control object: When a Java Control is created, the local control is created at the same time; When a Java Co

Configuration example of cisco router and layer-3 Switch environment, cisco layer-3 SwitchSimple environment configuration instance for cisco router layer-3 Switch I. network topology: Ii. configuration command: 1. vro Configuration: Interface FastEthernet0/0 Ip address 10.66.88.222 255.255.255.0 Ip nat outside Duplex auto Speed auto Interface FastEthernet0/1 I

expressions (two arguments can be followed, only one line)1 Lambda A, b:a + B + 100Four function I return valueIf return does not specify a value, it is none.1 def F1 (): 2 Print (123) 3 return ' 111 ' 4 # in the function, once the return is executed, the function execution process terminates immediately, and the following print will no longer execute 5 Print (456)II parameters1 General parameters (in strict order, the actual paramete

to complete a single step, but to describe the behavior of something in the whole process of solving the problem.For example, the process-oriented design is the first step in the analysis of the problem: 1, start the game, 2, Sunspot first go, 3, draw the screen, 4, Judge Win and lose, 5, turn to white son, 6, draw the screen, 7, Judge Win and lose, 8, return step 2,9, output the final result. The problem is solved by using separate functions for eac

Python Study Notes 3-strings, python Study Notes 3- Format String/compound field name >>> import humansize>>> si_suffixes = humansize.SUFFIXES[1000]>>> si_suffixes['KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB']>>> '1000{0[0]} = 1{0[1]}'.format(si_suffixes)'1000KB = 1MB' >>> import humansize>>> import sys>>> '1MB = 1000{0.modules[humansize].SUFFIXES[1000][0]}'.format(sys)'1MB = 1000KB' Sys. modules is a d

objectWhen initializing a Bitset object with a string object, it is initialized directly to the binary sequence, starting from the right of the string Object!!1 stringSTR1 (" +");2 //the 0-3 bits of the Bit1 object are 0001 and the remaining highs are 03bitset +>bit1 (str1);4 //It must be noted that the conversion of the string object and the Bitset object is reversed! That is, the maximum subscript (right) of the string object begins to

CSS 3 flashes to the right and CSS 3 flashes to the right. 1 1. directly add the code! Here is: 2. It is easy and convenient to use CSS3 for this white gradient flash effect. The only bad thing should be compatibility. Therefore, it is generally used on mobile terminals. 3. Coming! (Knock on the blackboard) I think the code comments are clear, so the focus of

Linux Device Driver Article 3: How to Write a simple character device driver ?, Linux Article 3 In the first article on linux Device Drivers: the device drivers briefly introduce character drivers. This article briefly introduces how to write a simple character device driver. This article draws on the source code in LDD to implement a character device driver unrelated to the hardware device, and only operat

WCF learning journey-Example 3 () and Example 3I. Preface Based on the previous 20 chapters, we know what it is: WCF; A, B, and C in WCF; the transfer mode of WCF; the boarding mode of WCF; and Exception Handling of WCF. This article combines the above knowledge points and writes a small WCF application-BookMgr ). This example is a very simple book management system with functions such as query, modification, addition and deletion (excluding security

PHP generates a short URL of 3 ways to code instances, PHP generated 3 instances of Short URL service, may be a lot of friends are no longer unfamiliar, now most of the microblogging, mobile email reminders and other places already have a lot of application patterns, and occupy a certain market. It is estimated that many friends are using it now. After looking at Sina's short connection service, we found t

Content on the machine: accumulate data using cyclic statements. Objective: To learn how to use cyclic statements. /** Copyright (c) 2012, Emy of computer science, Yantai University * All rights reserved. * Prepared by: Li Yang * completion date: January 1, November 01, 2012 * version No.: v1.0 * enter the description: none. * Problem description: the result of 1/3-3/5 + 5/7-7/9 ...... + 19/21. * Program ou

Mobile phone audio and video 3-local video list, audio and video 3-list 1. Write layout relative layout: ListView, TextView, and ProgressBar, initialization 1 Video_pager.xml 2. Load the local video, load the video in the Child thread, and load the video into the collection; set the adapter to be in the main thread; Use Handler to set the adapter 1 public class VideoPager extends BasePager {2

Introduction to algorithm competitions typical example 3-1 light-on problem, 3-1 light-on Problem There are n lamps numbered 1 ~ N, 1st people turn on all the lights, 2nd people press the switch in multiples of 2 (these lights will be turned off ), 3rd people press the switch in multiples of 3 (the switched light is turned on, and the light is turned off), and s

Differences between OC and Swift 3. Differences between OCSwift 3 11. switch structure in swift Difference 1: The switch condition in oc can only be an integer. The switch condition in swift can be set to almost any data type. Difference 2: Each case in oc should have a break. If there is no break, it will continue to run down the case until the break jumps out of the switch structure. Swift does not need t

Keywords: WPF. Net C # mvvm light Toolkit framework Visual Studio 2010 vs2010 expression blend 4 getting started tutorial New Practice 3. viewmodel and view Next, I plan to use the viewmodel OF THE mvvm light Toolkit framework on the simplest login logon interface. 1. Add a new item to the viewmodel directory of the merged project, select the "mvvmviewmodel (WPF)" file template, and name it loginviewmodel. CS. 2. Open viewmodellocator. Cs in the view