Introduction to the characteristics of tables in ExtJSthe table is defined by the class Ext.grid.GridPanel and inherits from Ext.panel,xtype to GridTable column information is defined by Ext.grid.ColumnModelThe data memory of the table is defined by Ext.data.Store, and according to the different data, the data memory can be divided into the following kinds:
Jsonstore,simplestore,groupingstore ...
The basic process of writing a table:
1. Create a table column model
var
I. Related software preparation and planning
1, related software and download address:
Cloudera manager:http://archive-primary.cloudera.com/cm5/cm/5/CDH installation package Address: http://archive.cloudera.com/cdh5/parcels/latest/Java Official Download (login required): http://www.oracle.com/technetwork/java/archive-139210.htmlJava versions archive Download (no login required): https://www.reucon.com/cdn/java/MySQL JDBC driver jar pack: http://dev.
Add checkbox to the front of each column of the grid: (I use the first one, and a string array in the background can be accepted) A general grid uses an Ext. grid. columnModel is enough. To add a multi-choice column, you can add a multi-choice column template Ext. grid. checkboxSel... syntaxHigh
Add checkbox before each column of the grid: (I use the first type, and accept a string array in the background)A general grid can use an Ext. grid. ColumnModel. To add a multi-choice column, you can add
Content specified in the central part of the SQL replace Field
Content specified in the central part of the SQL replace Field
Database creation tutorial
Create database cnnet;
Create a data table
Create table 'cnnet'. 'test '('Id' INT (4) not null AUTO_INCREMENT,'Url' VARCHAR (50) NULL,Primary key ('id ')) ENGINE = MYISAM
Insert several data entries:
Insert into 'test' ('id', 'url') VALUES(1, 'www. 1aa. cm '),(2, 'www. 1aa.
page!The getData. asp page first uses a DOMDocument object to save the data sent by the client:'Create a DOMDocument objectSet xml = Server. CreateObject ("msxml2.DOMDocument ")Xml. async = FalseThen it loads POST Data'Load POST DataXml. Load RequestIf xml. parseError. errorCode Call responseError ("XML Information cannot be loaded. "" Description: " xml. parseError. reason " End IfIt can return the commandtext element value and returndata or returnvalue element value. Below I will only provide
with large capacity by yourself3: 13 cm in diameter, 1 m length of poly (vinyl chloride) pipe (wall thickness 0.6-1 cm), PVC pipe will also be, 0.8 cm thick insulation sheet (cannot be wood! Best plastic) about 2.5 square meters, 0.5 cm thick insulation sheet (non-wood !) About 1.5 square meters, all of which can be b
: value 1, value 2, and value 3 .... Protected overridable function getdisplay (byval index as integer) as object
Dim I as integer
Dim temp as string = ""
For I = 0 to mdisplaymember. Length-1
Temp = temp IIF (I> 0, linkchar, "") mdataview (INDEX) (mdisplaymember (I ))
Next
Return temp
End Function
For other functions to retrieve values, see SourceProgram.
Spanning Tree
Updatetreeview calls the private method filltree to generate a tree. Note that filltree only generates the child nodes o
with large capacity by yourself3: 13 cm in diameter, 1 m length of poly (vinyl chloride) pipe (wall thickness 0.6-1 cm), PVC pipe will also be, 0.8 cm thick insulation sheet (cannot be wood! Best plastic) about 2.5 square meters, 0.5 cm thick insulation sheet (non-wood !) About 1.5 square meters, all of which can be b
can only display images in a grid. Therefore, bitmap and vector map display images in pixels.
Advantage and disadvantage Ratio: A Bitmap occupies a large amount of storage space, and the display speed of a vector image is slower than that of a bitmap, because it has a vector computing process.
To insert an image into the thesis, add \ usepackage {graphicx} to the introduction area (before the \ begin {document} command) to import the illustration macro package.
The following is the most frequen
1) applicationclass excelapp = new applicationclass (); 2) Change the Excel title bar: excelapp. caption: = 'application calls Microsoft Excel '; 3) Add a new workbook: excelapp. workbooks. add; 4) open an existing workbook: excelapp. workbooks. open ('C: \ Excel \ demo.xls '); 5) set 2nd worksheets as active worksheets: excelapp. worksheets [2]. activate; or excelapp. workssheets ['sheet2']. activate; 6) assign a value to the cell: excelapp. cells [1, 4]. value: = 'column 4 in the first row ';
Ant pole issue
Problem:There is a 27 cm fine wood pole, each of which has an ant in the five positions 3 cm, 7 cm, 11 cm, 18 cm, 23 cm. The wooden pole is very small and cannot pass through two ants at the same time. At the beginn
added to the map starts from 1.
A container consists of three cubes, A, B, and C. The bottom area of A, B, and C is 25 cm², 10 cm², and 5 cm² respectively (1) it takes 10 seconds for the water injection process to be filled with A, and then B is filled with 8 seconds.
(2) Evaluate the hA height and water injection speed v;
Expected by question: 25hA = 10 v 10 (
Three cluster nodes
192.168.1.170 CDH-Master
Cdh-slave-1 192.168.1.171
Cdh-slave-2 192.168.1.171
1. Install centos6.5 (64-bit) and set up the basic environment, including:
(1) Add sudo Permissions
(2) modify the host name, gateway, static IP address, and DNS
(3) Disable SELinux and Firewall
Refer to the article
(4) modify the system time zone and configure the NTP service (select the host machine to configure the NTP server, refer to the article)
2. Clone the three hosts and modify static IP add
Recent projects need to use Oozie Workflow scheduling hivesql, found unable to execute query statements, see: https://community.cloudera.com/t5/Batch-Processing-and-Workflow/ oozie-hive-action-failed-with-wrong-tmp-path/td-p/37443 this, the culprit is CDH bug, need to upgrade the version.Upgrade steps:1. Querying a service on a single nodeService--status-allFound only cloudera-scm-agent, no cloudera-scm-server, indicating that this is not the primary node.2. View Cloudera's master nodeCat /etc/c
Given an integer array of size n, find all elements this appear more than times ? n/3 ? . The algorithm should run in linear time and in O (1) space.Hint:
How many majority elements could it possibly?
Do you have a better hint? Suggest it!
This question is about Moore's voting law. Specifically, you can refer to Grandyang's explanation. The code is as follows Publicilistint> Majorityelement (int[] nums) { intm =0; intn =0; intCM =0; intCN =0; foreach(varNuminchnums) {
http://www.aboutyun.com/thread-9189-1-1.html here to the hehe. 1. Related catalogue/var/log/cloudera-scm-installer: Install log directory./var/log/*: Related log files (related services and cm)./usr/share/cmf/: Program installation directory./usr/lib64/cmf/: Agent program code./var/lib/cloudera-scm-server-db/data: Embedded Database directory./usr/bin/postgres: Embedded Database program./etc/cloudera-scm-agent/: The configuration directory of the agent
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