learn cassandra from scratch

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Learn the installation of Linux from scratch

Cheer up, first as a non-computer professional graduate, I think. This want to learn computer, or rely on their own, trained is not necessarily Daniel. The non-computer is not necessarily all rookie ... Well, let's start with the first installment of today's ———— install LinuxThis time is done in the VBox virtual machine. Personal feeling vbox more useful than VMware, the main occupation system resources are not many. Take CentOs5.5 as an example----s

JavaScript Advanced Programming--Learn from scratch (1)

javascript--the client Web browser scripting language.What is language?Used for communication, with complete syntax and explicit semantics .A complete set of JavaScript implementations consists of three different parts:1,ecmasript (CORE)Just a description that defines all the properties, methods, and objects of the scripting language. That is, a language has a clear code of use and use of the method.It provides the syntax, operators, and basic objects of JavaScript that are necessary to implemen

Learn springboot from scratch (scheduled Tasks)

Package com.kfit.base.scheduling;Import org.springframework.context.annotation.Configuration;Import org.springframework.scheduling.annotation.EnableScheduling;Import org.springframework.scheduling.annotation.Scheduled;/*** Scheduled Tasks* @author Administrator**/@Configuration@EnableSchedulingpublic class Schedulingconfig {@Scheduled (cron = "0/20 * * * * *?")//every 20 secondspublic void Scheduler () {System.out.println (">>>>>>>>> Schedulingconfig.scheduler ()");}}

Learn from scratch the front end JAVASCRIPT-11, JavaScript base this point four cases

Four cases of this in JavaScript (non-strict mode) 1. When this function is the event handler, this points to the event source.2. When this function is a constructor, this points to the new object.3. This refers to the object to which the function belongs.4, when this function does not belong to the object, this point to the Window object"Utf-8"/> "Box" class="Box"style="height:100px, width:100px, background: #f3f3f3;">Learn from

Learn about the front-end JAVASCRIPT-4, JavaScript basics Math, and date objects from scratch

writing if in the window.onload call, proposed to put the anonymous function,//related to the scope of the problem, JS run to this error, can also adjust the location of JS reference    Timer:Syntax: setinterval (function or code string, specified time (ms));Executes a function or a string of code in a specified period (in milliseconds).Clear Timer: clearinterval ();var num = 6;var timer = setinterval (function () {console.log (--num); if (num = = 0) {clearinterval (timer);}}, 1000);  

Learn the front-end JAVASCRIPT-5, JavaScript base BOM from scratch

. Console.log (navigator.useragent);7:window Events OnResize: Window Scaling event. Window.onresize = function () {Console.log (2)} OnLoad: The Load event page is executed after it has finished loading. //Get browser window width/height Window.onload = function () {Console.log (document.documentElement.clientWidth) Console.log ( Document.documentElement.clientHeight)} Onscroll: Scrolling event. //Get browser scroll bar hidden width/height Chrome (body),

Learn the ES6 of the Web from scratch (iii) ES6 Basic grammar One

Hello everyone, here is "learn the Web series from scratch" and synchronize updates at the following address ... Github:github.com/daotin/web Public number: The top of the Web front Blog Park: http://www.cnblogs.com/lvonve/ csdn:blog.csdn.net/lvonve/ Here I will start with the Web front End 0 Foundation, step-up learning web-related knowledge points, during the period will also sh

Learn the web's mobile Web from scratch (vii) Bootstrap

Hello everyone, here is "learn the Web series from scratch" and synchronize updates at the following address ... Github:github.com/daotin/web Public number: The top of the Web front Blog Park: http://www.cnblogs.com/lvonve/ csdn:blog.csdn.net/lvonve/ Here I will start with the Web front End 0 Foundation, step-up learning web-related knowledge points, during the period will also sh

Learn the Web from scratch Vue.js (ii) filter, key modifier, custom directive

Hello everyone, here is "learn the Web series from scratch" and synchronize updates at the following address ... Github:github.com/daotin/web Public number: The top of the Web front Blog Park: http://www.cnblogs.com/lvonve/ csdn:blog.csdn.net/lvonve/ Here I will start with the Web front End 0 Foundation, step-up learning web-related knowledge points, during the period will also sh

ORACLE 11G Learn from scratch-20141208

directory: If the data stored in the block is a table data, the table directory stores information about the table.3, Row directory4, free space:5. Row space: The storage space already used in the block, which stores the data of the table or index in the row space.1.4. New features of Oracle 11g1.4.1, database Management Section1. Program ManagementAllows a user to fix a query plan for a particular statement, with no statistical data changes or changes to the database version, without altering

ORACLE 11G Learn from scratch-20141202

Model: Use "graph structure" to represent the connection between data.Object-oriented Model: Use "Object" to represent the connection between data.(3), physical data modelIt is a model for the representation of computer physics.The three main elements of the data model: data structure, manipulation, and integrity constraints.1.2.6, data integrity constraints(1), Entity integrityIf property A is the primary property of the basic relationship r, property A cannot take a null value.(2), referentia

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