break"Here we can prove that our guess is correct. Although this problem is illustrated above, it should not be very easy to understand. Let's define a code block and explain it again:Copy codeThe Code is as follows:Def m1P'start in m1 ...'M2 do # code blockP 'start in block in m1 ...'P 'end in block in m1 ...'EndP' end in m1 ...'End
Def m2 blockP'start in m2 .
Our previous practice was to:No matter what type of user is logged in: Hospital, health Bureau, etc. the left menu is the same. In this article we are going to implement different user login when the menu displayed is different.Let's start with the tables in the database: those tables are related to third-party systems.These tables correspond to theWhat we're looking for is a two-level menu under a character's menu and menu:Let's go to the menu table first:We see Bss_sys_module is the Menu table
__,__ target __,...) std: bind (__ selector __,__ target __, ##__ VA_ARGS __)
# Define CC_CALLBACK_0 (method, target, variable parameter) std: bind ( obtain method address, target, variable parameter)
PS: it cannot be used when defining macros... as before... as a variable parameter, you must replace it with ##__ VA_ARGS _, a great third party.
Variable parameters are also used in the entire cocos-x. For example, creating Sequence: create is a motion. Otherwise, how can you input so many para
Title Link: http://acm.hdu.edu.cn/showproblem.php?pid=5584Give a coordinate (ex, EY) and ask what points it came from. The rules for walking are X or y plus their least common multiple LCM (x, y).Consider (ex, EY) is coming from other points, it is advisable to set when walking to (x, y), GCD, =K,X=K*M1, y=k*m2.The next step may be (x, Y+X*Y/GCD (x, y)) or (X+X*Y/GCD (y), y).denoted by K and m1,m2 (k*m1, k*
Analyze the public, protected, private, and default access permissions of java from the perspective of instances, publicprotected
1. public
Same package
1. Internal
Public class A {public int f = 1; public void m1 () {} public void m2 () {f = 2; // class internal normal access m1 (); // class internal normal access }}
2. Subclass
package same;public class A { public int f=1; public void m1() {}}
Package same; public class B extends A {publi
Java studies a simple algorithm and encounters this output. Well, I didn't really pay attention to it before ......
Java studies a simple algorithm and encounters this output. Well, I didn't really pay attention to it before ......
What is this running principle ?????
package org.rui.util;import java.util.HashMap;import java.util.Map;public class A{public static void main(String[] args){Map
m = new HashMap
();Map m2 = m;
is M2, the speed is V2, the collision speed is V1 ', V2 ' respectively.The momentum is satisfied:M1 * v1 + m2 * v2 = m1 * v1 ' + m2 * v2 ' • Collision Type and conservation of energy1). Full Elastic collisionNo loss of kinetic energy, the following formula is satisfied:M1 * v1^2 + m2 * v2^2 = * * M1 * v1 ' ^2 + *
Java custom ArrayList sorting, skipped
There are two types of objects in a list. Now there is a need to sort the dates of different objects. below is the code
/*** @ Author Xiaohua xh1991101@163.com*/
List
Messages = messageSrv. getList (u. getUserId ());
List
MessageList = new ArrayList();For (Object o: messages ){MessageList. add (o );}For (Object o: checks ){MessageList. add (o );}Collections. sort (messageList, new Comparator (){Public int compare (Object o1, Object o2 ){If (o1 instanc
There are two kinds of objects in a list, and now there is a need to sort the dates of different objects, the following is the code/*** @author Xiao Hua [email protected]*/ListListfor (Object o:messages) {Messagelist.add (o);}for (Object o:checks) {Messagelist.add (o);}Collections.sort (Messagelist, New Comparator () {public int Compare (object O1, Object O2) {if (O1 instanceof message O2 instanceof message) {Message m= (message) O1;Message m2= (mess
Introduction: Cacti monitoring MySQL server about 50 graphs have been out, also out of the map, which encountered some problems, the impression of a more profound record as follows:(i): Add IO MonitoringClick Create Graphs for the This Host to enter the image of the IO, resulting in an errorThis data query returned 0 rows, perhaps there is a problem executing this data query. You can run the this data query in the debug mode to get more information.Enter *turn on Graph Debug mode, with the fo
Prerequisites: The Zabbix server side is already installed and functioning properly.
1 need to download Zabbix client, install client to open 10050 port
wget http://www.zabbix.com/downloads/2.0.8/zabbix_agents_2.0.8.linux2_6.amd64.tar.gz
Add Zabbix users and groups.
Groupadd Zabbix
Useradd zabbix-g zabbix-s/sbin/nologin
2 Decompression
TAR–XVF zabbix_agents_2.0.8.linux2_6.amd64.tar.gz
Mv zabbix_agents_2.0.8.linux2_6.amd64/usr/local/zabbix_2.0.8
[Root@db-m
Tags: orm compilation install SEL tran Server-id mod pos HTML tableMySQL5.7.10 Multi-copy function building1. Environment: centos6.5[Email protected] mysql-5.7.10]# cat/etc/redhat-releaseCentOS Release 6.5 (Final)Host:mysql-m1 192.168.56.21mysql -m2 192.168.56.22mysql-s 192.168.56.23Now that the MYSQL-M1 database has been set up, I use my own virtual machine to clone and omit to install the database multiple times.2. Ensure that the server_id Lo
Question:
X = AI (mod mi) 1
Consider K = 2 first:
X = A1 (mod M1)
X = a2 (mod m2)
D | (a1-a2), where D = (M1, M2)
The proof is as follows:
Necessity: Let X be the solution of the above homogeneous equations, so there is an integer Q1, Q2 makes X = A1 + m1 * Q1, x = a2 + m2 * Q2, remove X and get a1-a2 = m2q2-m1q1. Because d = (M1,
code example: Pattern P = pattern. compile ("// D +"); matcher M = P. matcher ("22bb23"); M. matches (); // returns false because BB cannot be matched by/d +, leading to unsuccessful matching of the entire string. matcher m2 = P. matcher ("2223"); m2.matches (); // returns true because/d + matches the entire string. Now let's look back at pattern. matcher (string RegEx, charsequence input), which is equiva
Self is very useful in distinguishing global variables/functions from member variables/functions in objects. For example, it provides a scope mechanism. I personally think it is much clearer than Ruby's @ and @. This may be a habit, but it is indeed very similar to this in C ++ and Java.
However, self is always a problem for me. I have said here before-I once dreamed that these can be improved in python3, then it usually leads to a round of hot discussion and ends with what people call "Explicit
select| problem Hi,everyone:
Today we continue to discuss select top N issues.
1. DB2 m 2
As mentioned in the previous discussion, M2 cannot be constructed because the DB2 subquery does not support an ORDER BY clause. In fact, DB2 provides a new set of functions, called OLAP functions, that can support top n issues very well.
M2:
SELECT * FROM
(SELECT Mykey,rank () over (Ord_col DESC) as Myrank
From MYTABL
the regulatory process, it is necessary to add relevant authorized users to MySQL so that MySQL can support the maintenance of the supervision machine. Authorized users include a mmm_monitor user and a mmm_agent user, and add a mmm_tools user if you want to use the MMM Backup tool.Lab Environment:Prepare five server simulations, as shown in the table:
Host
Operating System
IP Address
main software
MYSQL-M1 Server
CentOS7.4 x86_64
1
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