Tag:Low version

  • Translation of ES6 from webpack-babael7


    Now?JavaScriptCode is mainly usedES6Write, but not all browsers support itES6Grammar, therefore, needs some kind of transformation mechanism, that is, willES6+Grammar intoES5Grammar,babel7Can help us do it. 1. Introduction to Babel babel-loaderIt’s awebpackThe loader is used to transfer theES6+Translate intoES5, to get startedbabel-loader, we need to install some dependencies tobabel7For example, there are some dependencies: @babel/core @babel/preset-env […]

  • The crash of iph6plus program caused by Gaussian blur in CSS3


    Guide page, background image to do Gaussian Blur effect, in ip6plus, 12 xx.xx On some of Ben’s mobile phones, the program will flash back. Check out, APP memory explosion when the background image appears. Positioning out, the lower version of the model Gaussian Blur effect will be obvious stuck, but not necessarily the program will […]

  • Promise a very simple use


    During the development process, I have encountered many asynchronous problems, which are solved in a very stupid way. I have encountered them again today. I decided to use promise for a try. After looking at it for a while, I found that the simple use of promise is very simple, so I feel like sharing […]

  • Centos7 installation hive3.1.2


    Hive3.1.2 installation 1. Download wget https://mirrors.tuna.tsinghua.edu.cn/apache/hive/hive-3.1.2/apache-hive-3.1.2-bin.tar.gz 2. Decompression tar -zxvf apache-hive-3.1.2-bin.tar.gz 3. Rename mv apache-hive-3.1.2-bin hive Configure hive 1. Edit hive- site.xml #Create a hive- site.xml file vim /usr/share/hive/conf/hive-site.xml #Add the following content (MySQL is configured to store metadata) <configuration> <property> <name>hive.exec.scratchdir</name> <value>/home/hadoop/scratchdir</value> </property> <property> <name>hive.metastore.warehouse.dir</name> <value>/home/hadoop/warehouse</value> </property> <property> <name>hive.metastore.uris</name> <value>thrift://hadoop:9083</value> </property> <property> <name>javax.jdo.option.ConnectionDriverName</name> <value>com.mysql.cj.jdbc.Driver</value> […]

  • Maven — failed to execute goal org.apache.maven .plugins


    Reason for error report: When the project is released, due topom.xmlMissing from filemaven-compiler-pluginPlug in dependency or not added<source>and<target>Property. mavenIt’s a project management tool, if we don’t tell it what our code is going to usejdkIf the version is compiled, it will be usedmaven-compiler-plugindefaultjdkVersion to deal with, so it is prone to version mismatch, which may […]

  • Canvas series tutorial 07 canvas animation basics 1


    Above we played a chart, we learn the structure, and then on that basis to expand a variety of charts, slowly can form their own chart library. Can also look at some foreign chart library simple version, analysis, reading code is very useful to improve. I have said two main uses of canvas, one is […]

  • Centos7 upgrade / install Git


    Installation of CentOS 7 GIT and upgrade of CentOS 7 Git 1. Yum install Git This is the easiest to install the lower versionGit 1.8.3, if you want to install a higher version,See point 2 This is the easiest way to install git, but the installation version of Git is relatively old, most of which […]

  • [swote learning notes] virtual machine centos7 configuration IP


    Centos7 IP configuration It is recommended to change the network connection mode to bridge network cardThe view IP of centos7 is different from that of the lower version #View IP information ip addr #Find the name of the network card corresponding to the location where the network card configuration is stored cd /etc/sysconfig/network-scripts #This is […]

  • Integration of spring framework and redis


    It’s been a long time since we made a lot of Maven files in spring The first is the pit of spring data redis and jedis versions. These two versions can only be used when they are matched. A higher version and a lower version may have no class instance errors. In any case, they […]

  • Maven Foundation (2) | correct posture of resolving dependency conflict


    1、 Principle of dependence Suppose thatJavaMavenService2Module,log4jThe version is1.2.7InJavaMavenService1In the module, although it inherits fromJavaMavenService2Module, but it excludes theJavaMavenService2Inheritance in module1.2.7Version of, introduced by itself1.2.9Oflog4jEdition. In this case, relative toWebMavenDemoFor,log4j.1.2.7.jarThe dependent path of isJavaMavenService1 >> JavaMavenService2 >> log4j.1.2.7.jar, the length is 3; andlog4j.1.2.9.jarThe dependent path of isJavaMavenService1 >> log4j.1.2.7.jarThe length is 2. thereforeWebMavenDemoInheritedJavaMavenService1The log version in […]