• Fundamentals of computer operating system (1) — overview of operating system


    introduction The importance of computer basic knowledge is self-evident. The current technology can be said to be updated at the speed of seconds, but the basic things will not change once in decades. This is the first article, operating system overview, with you to familiarize yourself with what the whole computer operating system has, which […]

  • css: hide or dispaly div


    Liufu member html {-webkit-text-size-adjust: 100%;-ms-text-size-adjust: 100%;} /*Unlink highlight*/ body,div,ul,li,ol,h1,h2,h3,h4,h5,h6,input,textarea,p,dl,dt,dd,a,img,button,form,table,th,tr,td,tbody,article, aside, details,figcaption,figure,footer,header,hgroup, menu,nav,section{ -webkit-tap-highlight-color:rgba(0, 0, 0, 0); } /*Set HTML5 elements as blocks*/ article, aside, details,figcaption,figure,footer,header,hgroup, menu,nav,section {display: block;} /*Picture adaptation*/ img{max-width: 100%;height: auto; width:auto \9; /* ie8 */-ms-interpolation- mode:bicubic;/ *In order to take care of IE image scaling distortion * /} /*Cancel auto fill color […]

  • Android 5.0 and Android 6.0


    Gradle configuration item compileSdkVersionWhich version of Android SDK is used to compile your app. Therefore, we strongly recommend always compiling with the latest SDK. There are many benefits to using new compile checks on existing code, avoiding new obsolete APIs, and preparing for new APIs. minSdkVersionIt is the minimum requirement for an application to run, […]

  • Electronic Vue cross platform desktop application development practical course (1) — Hello World


    This article will lead you to build a hello world using Vue cli + electronic builder Electron is based on chromium and Node.js , can use HTML, CSS and JavaScript to build cross platform application technology framework, compatible with Mac, windows and Linux. Before you start building the project, you need to install the following […]

  • Wechat applet one click fast application


    The syntax of wechat applet and fast application compatible version has more than 95% similarity. Through NPM package, we can realize the one click conversion from wechat applet source code to fast application source code. 1. Install QA adapter qa-adapterIt can be used to help developers who have WeChat applets or Alipay applets to quickly […]

  • Implementation of bottom navigation bar of mainstream app based on uitabbarcontroller


    preface When there are multiple controllers in the app, you need to manage these controllers. Use one controller to manage multiple other controllers, as shown in the figure: IOS uiview provides two special controllers, UINavigationController and uitabbarcontroller, to manage other controllers. Here is a simple example to illustrate the basic usage: Basic contents of UIWindow […]

  • Simple java Hadoop MapReduce program (calculate average score) from package to submit and run


    [TOC] Simple java Hadoop MapReduce program (calculate average score) from package to submit and run Program source code import java.io.IOException; import java.util.Iterator; import java.util.StringTokenizer; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.fs.Path; import org.apache.hadoop.io.IntWritable; import org.apache.hadoop.io.LongWritable; import org.apache.hadoop.io.Text; import org.apache.hadoop.mapreduce.Job; import org.apache.hadoop.mapreduce.Mapper; import org.apache.hadoop.mapreduce.Reducer; import org.apache.hadoop.mapreduce.lib.input.FileInputFormat; import org.apache.hadoop.mapreduce.lib.input.TextInputFormat; import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat; import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat; import org.apache.hadoop.util.GenericOptionsParser; public class Score { public […]

  • What is PL / SQL?


    1、 What is PL / SQL? PL / SQL (procedure language / SQL) is an extension of Oracle in the standard SQL language. QL / SQL can not only embed SQL language, but also define variables and constants, allow private conditional statements and circular statements, and allow exceptions to handle various errors, which makes its […]

  • Re arrangement: the construction of general C language environment under Visual Studio code (vscode)


    Copyright notice: This is the original article of the blogger, following CC 4.0 by-sa copyright agreement. Please attach the original source link and this notice for reprint. Link to this article: https://www.cnblogs.com/czlhxm/p/11794743.html Reference blog: organize: Visual Studio code (vscode) configure C, C + + environment / write and run C, C + + (main windows, […]

  • How to get customer list from SAP SD micro research?


    How to get customer list from SAP SD micro research?     What we study here is how to quickly query a list of customers for business users. Therefore, SE16 + and se38 + program name are not discussed in this paper because the general business users will not have the right to execute. 1. […]

  • 0001 build the first C ා application manually


    Prerequisites:. Net Framework version 4.5 or above or vs2015 installed 1. Write and run a C console program manually Add path environment variable: “my computer properties advanced system settings environment variable system variable path Edit new”C compiler( csc.exe )Directory (C: WindowsMicrosoft.NETFramework64v4 . 0.30319, which is the corresponding directory on my machine) is added to the […]

  • Using swift language to develop Hadoop data flow application


    For detailed source code of this article, please refer to GitHub perfect examples This project shows how to develop Hadoop stream processing application using swift language. SPM is used to compile and test the software, which is also a part of perfect project. This package can be used independently, so it can be separated from […]