state of the admin changes to: In_state_change (None,none, subscribe), {none, in};After the admin accepts the request, the state changes: Out_state_change (None,in, subscribed), {from, none};Lihengz Status change: In_state_change (None,out, subscribed), {to, none};If admin also adds Lihengz as a friend:Admin status change: Out_state_change (From,none, subscribe), {from, out};Lihengz Status change: In_state_change (To, none, subscribe)---{to, in};Lihengz Accept request, state changes: Out_state_
:: Before
Before inserting, in front of the inside of a box
:: After
After inserting, the last face inside a box
Text ShadowText-shadow: horizontal Shadow vertical shadow blur distance shadow colorDescribe:Text shadows can have multiple sets of values, separated by commas, toHorizontal Shadow positive shadow on right side negative on leftVertical shadow values are below, negative values are aboveFuzzy strength, the larger the value the more blu
Phper's common noodle questions for the great gods.
How to design the sub-database table
How do I handle a MySQL deadlock?
Talk about your understanding of closures.
PHP Memory Recovery mechanism
How to troubleshoot PHP memory overflow issues
Methods of database Optimization
Brief introduction of operation Principle of Laravel
Laravel Routing Implementation principle
Cookie and session difference, where is the session saved on the server? How does the se
correspondsSolution Ideas1) The variables (appium_port, bootstrap_port , and devicename) are written to the file at the same time as the command is generated by step 1, which can be the init file, Yaml file or other)2) When creating the driver, read the port and device name from the file,3. Multi-threaded or multi-process run scriptsPractice finds that using multithreading to run Python scripts, under the latest Appium service, can sometimes cause confusion, in order to avoid this problem, we
situation
Stats items: Displays the number of item in slab
Stats cachedump 1 0: Lists the key values stored in the first paragraph of the slabs
Set|get: saving or retrieving data
STAT Evictions 0: Indicates the number of legitimate item moves to free up new space for new item
Other common software uses:
Shell>./memcached-tool 127.0.0.1:11211
Shell>./memcached-tool 127.0.0.1:11211 display
Web software:
memcache.php
Nagios Plugin
Cacti modul
http://369369.blog.51cto.com/319630/833234/1, check whether the client's request data in the memcached, if any, directly return the request data, no longer do any operation on the database, the path operation is ①②③⑦.2, if the requested data is not in memcached, go to the database, the data obtained from the database to the client, while the data cache a copy to the memcached (memcached client is not responsible, need the program explicitly implemented), the path operation is ①②④⑤⑦⑥.3. Update th
on any separate server.5Memcached deficiencies1, the data is stored in memory, once the service process restarts, the data will be lost allCountermeasure: Can take change memcached source code, increase the function that write to hard disk regularly2, memcached run with root privileges, and memcached itself does not have any rights management and authentication functions, security is insufficientCountermeasures: The memcached service can be bound to the intranet IP, through the firewall to prot
situation
Stats items: Displays the number of item in slab
Stats cachedump 1 0: Lists the key values stored in the first paragraph of the slabs
Set|get: saving or retrieving data
STAT Evictions 0: Indicates the number of legitimate item moves to free up new space for new item
Other common software uses:
Shell>./memcached-tool 127.0.0.1:11211
Shell>./memcached-tool 127.0.0.1:11211 display
Web software:
memcache.php
Nagios Plugin
Cacti modul
; } returne; }v. Some trivial topics5.1 Thread SafetyArrayList, Hashset/linkedhashset, Priorityqueue, LinkedList are thread insecure and can be resolved using the Synchronized keyword, or similar to the following:List List = Collections.synchronizedlist (new ArrayList (...));5.2 Clone ()Clone () of ArrayList, LinkedList, Hashmap/linkedhashmap, TreeSet is a shallow copy, and the element's reference is the same as before the copy, and the Priorityqueue clone () inherits from object.5.3 fore
its static nested class, you do not need this:public class J extends h.b{}Just so it's OK.Ah, almost ~ ~ the whole inner class of things is almost these, wrote me 3个小时42分钟 ~ Khan!!!!If there is no place to write, please add ~ ~The wrong place also please correct me ~ ~========================================================QiujuerBlog:Blog.csdn.net/qiujuerWebsite:Www.qiujuer.netOpen Source Library:Genius-androidReprint Please specify Source: http://blog.csdn.net/qiujuer/article/details/43282699
reference to a parent class type that contains more than one type of cell.V Note the following questions need to be considered to make reasonable use of the properties of the polymorphism of the class:① when designing a base class, you should consider the relationship between the subclasses, and based on this information, you can extract the common attributes and place them in the parent class.② Pure virtual method: The pure virtual method shows in the class definition that the method does not
of the agent is to load and save data. It can be used in the store or directly in the model, but it is generally recommended to use only in the store, and the model as a pure entity link to use, so that its class contains only the fields, master-slave table correspondence and validation and other basic information, the proxy into the store.Model represents some of the objects that the application manages. The model is defined as a collection of fields, arbitrary methods, and model-related prope
a character type-%s: Interpret the input as a string-%f: Interpret the input as a single-precision floating-point number-%LF: Interpret the input as a double-precision floating-point number* * Arithmetic operator * *-Unary Operator: + + 、---Two-dollar operator: + 、-、 *,/,%* * Front + + and rear ++**-i++ is first to take I value to do the calculation, the operation finished last again +1;-++i is the first +1, then the I value to do the calculation.* * Automatic type conversion * *Converts a valu
stu_name= ' zhang3 '; (delete data)(6) TRUNCATE TABLE oss_base; drop table oss_base; (Delete large table operation)9.DQL: Data Line Query Language (select Show)(1) Select User,passoword, host from Mysql.user;10. Complex statements(1) SELECT co.name from city as CI, country as CoWHEREci.populationand Co.code=ci. CountryCode; (Multi-table query)(2) SELECT * from city WHERE countrycode= ' au ' ORDER by population DESC; (sort)(3) SELECT * from cityWHERE countrycode= ' CHN 'ORDER by populationDESCLi
Hello, everyone, today brings the Java development must learn the carding of knowledge, hope to the small partners in the technological growth of the road to help.DatabaseMysql1, SQL basic syntax (data type, add and revise, join, function, etc.).2, index (classification, failure conditions, the use of explain, optimization conditions).3, engine contrast (INNODB,MYISAM).4, things, isolation level.5. Database lock (row lock, table lock, read lock, write
server is calculated and distributed to a 32-square circle of 0 to 2, then the hash value of the key that stores the data is calculated in the same way and mapped to the circle, and finally from the location of the data map to a clockwise lookup, save the data to the first server found, If more than 2 of the 32 parties are still unable to find the server, the data is saved to the first memcached server. If you add a memcached server, the keys on the first server that only increase the counter-c
situation
Stats items: Displays the number of item in slab
Stats cachedump 1 0: Lists the key values stored in the first paragraph of the slabs
Set|get: saving or retrieving data
STAT Evictions 0: Indicates the number of legitimate item moves to free up new space for new item
Other common software uses:
Shell>./memcached-tool 127.0.0.1:11211
Shell>./memcached-tool 127.0.0.1:11211 display
Web software:
memcache.php
Nagios Plugin
Cacti modul
using the graphics library. You use the mobile phone display background, display the phone number, text messages are also based on the graphics library to achieve. Embedded Linux system is not necessarily used in the graphics library, so the graphics library is one of the embedded Linux system can be cut, the current popular graphics library has QT/MINIGUI/GTK+2/MFC, in addition to MFC can be used in embedded Linux system.Embedded Linux system-embedded database, or embeded SQL, is another impor
The main content of this article is their own use of WPF development, my knowledge of the carding, only for the personal summary, the understanding of a lot of things are still in the exploratory phase, there will always be a fallacy and better development methods, if you can put forward valuable suggestions, grateful.Although I am not only focused on WPF, but also like all kinds of programming languages, it is estimated that WPF development will cont
Data structure and algorithm is a required course of learning programmer, the following is my study after the knowledge point carding and summary.Originally used Xmind do when the important knowledge points are attached to the blog link, but Xmind guide out after the open.Don't worry, I put the relevant content in the data structure column.#专栏地址: http://blog.csdn.net/column/details/20027.html#如果喜欢该知识点的总结, image download Link: https://download.csdn.net
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