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Design Pattern 22-behavior pattern policy pattern

policy interface class that only provides interfaces. QuickSort and SelectSort implement specific algorithms according to interfaces.Sample Code:Using System; using System. collections. generic; using System. text; namespace Pattern22 {// abstract algorithm class abstract class SortAlgo {// algorithm method public abstract void Sort () ;}// quick sorting algorithm class QuickSort: sortAlgo {// specific fast Sorting Algorithm public override void Sort () {Console. writeLine ("quick Sorting Algor

Python assistant Artifact Hyperopt

First, installationPip Install hyperoptIi. descriptionThe hyperopt provides an optimized interface that accepts an evaluation function and parameter space to calculate the loss function value of a point within the parameter space. The user also specifies the distribution of the parameters within the space.Hyheropt Four Important factors: Specify the function that needs to be minimized, the space to search, the sampled data set (Trails database) (optional), the algorithm for searching (optional).

The netfilter/ptables of the Linux firewall

] ... [!] --destination-ports,--dports Port[,port|,port:port] ... [!] --ports Port[,port|,port:port] ...-m iprange//Specify the address range [!]--src-range from[-to] [!]-- Dst-range From[-to]-M mac-m string///to the application layer data in the message to do a pattern matching detection, kernel version needs to be greater than or equal to 2.6.14. --algo {BM|KMP} Specifies that the string match detection algorithm--from offset//

Set your own software's ringtone + vibrate in Android

Sometimes some communication software needs these functions, such as receiving text messages, notifications, etc., asking the phone to make a ringtone, or vibrate, or glow to prompt the user to know.Often mobile phones have default settings, such as the user to turn on the ring + vibration, only the ring does not vibrate, completely mute and so on ...This is the time to have a rule, at least software settings can not be in conflict with the systemRules:1. The software should have its own setting

Operate XML with T-SQL

of the name in the T-SQL for this query. The value between the start and end Param mark indicates the default parameter value. List 2. Demonstrate template query for parameter syntax. Figure 2Displays the query results by calling the listsearchedauthors. XML template. You can specify a parameter value by adding a question mark (?) After the template query URL, and there is a pair of values separated by equal signs (=. The first item in the value pair is the parameter name, and the second

SQL Data Operations Basics (intermediate) 8

field values The function count () is perhaps the most useful aggregate function. You can use this function to count the number of records in a table. Here's an example: SELECT COUNT (au_lname) from authors This example calculates the number of names (last name) in table authors. If the same name appears more than once, the name will be counted multiple times. If you want to know how many authors are named for a particular value, you can use the WHERE clause as shown in the following example

Android Note adb command parsing 1

local:logd//PC All 6100-port communication data will be redirected to the phone-side/simulator UNIX type socket-ADB forward--no-rebind -Same as ' adb forward If you specify--no-rebind, the same adb forward -If ADB forward--remove ADB forward--remove-all-remove all forward socket connectionsADB jdwp-list PIDs of processes hosting a JDWP transportADB install [-l] [-r] [-d] [-S] [--algo y>--iv -Push this package file to the device and install it('-l ' m

Rhel5 l7 kernel Compilation

[tables]Make install 3. Use iptables to set application-layer filter rulesExample 1: Use layer7 to display the matching policy and access data packets from the application layer, such as qq, msn, and edonkey.Iptables-a forward-m layer7 -- l7proto qq-j DROPIptables-a forward-m layer7 -- l7proto msn-filetrandfer-j DROPIptables-a forward-m layer7 -- l7proto msnessenger-j DROPExample 2: Use "connlimit" to display matching to control concurrent data connections. If more than 100 concurrent connectio

Linux iptables lay7 configuration (below)

modules matches a given string by using some pattern matching strategy. Ü it requires a Linux Kernel gt; = 2.6.14. Ü [!] -- String pattern ? Matches the given pattern. U -- algo {BM | KMP} ? Select the pattern matching strategy. (Bm = Boyer-Moore, KMP = knuth-Pratt-Morris) Ü examples: ? Iptables-A output-p udp -- dport 53-M string -- string "verycd" -- algo BM-J Drop ? Iptables-A output-p tcp -- dport 80-

Rhel5 l7 Kernel Compilation

source code path../Configure -- prefix =/-- with-ksource =/usr/src/linux-2.6.28.8MakeMake install(4) install the L7-protocol Protocol definition packageTar zxvf L7-protocol [tables]Cd L7-protocol [tables]Make install 3. use iptables to set application-layer filter rulesExample 1: Use layer7 to display the matching policy and access data packets from the application layer, such as qq, msn, and edonkey.Iptables-a forward-m layer7 -- l7proto qq-j DROPIptables-a forward-m layer7 -- l7proto msn-file

Android notes adb Command Parsing 1, androidadb

tcp: 7100 // All port 6100 communication data on the PC will be redirected to the mobile phone end/simulator port 7100 server2. eg:Adb forward tcp: 6100 local: logd // All port 6100 communication data on the PC will be redirected to the mobile phone/simulator UNIX socket --> Adb forward -- no-rebind -Same as 'adb forward If -- no-rebind is specified, the same adb forward --> If Adb forward -- remove Adb forward -- remove-all-remove all forward socket connections Adb jdwp-list PIDs of proc

Tips for using iptables to filter URL target requests

Recently found that more and more office hours in the misuse of video sites, may be due to the impact of the brain, but must be working time, should not do things unrelated to the work, but also too much impact on office bandwidth. I tested a rule on routing to block video site access requests, found to be very effective: Iptables-a forward-m string–string "ku6.com" –algo bm-j DROP Iptables-a forward-m string–string "tudou.com" –

ETCD Enable HTTPS service

", "usages": [ "signing", "key encipherment", "server auth", "client auth" ] } } }}Field Description: Ca-config.json: You can define multiple profiles, specify different expiration times, use scenarios and so on, and then use a profile when signing a certificate. There are two profiles defined, one for kubernetes and one for ETCD. However, because this document

How to design error codes and error messages for the system

Author: Zhu Jinchan Source: http://blog.csdn.net/clever101 A software system must be involved in a lot of error messages. For example, if a user performs an error, the software needs to return the error message to the user. So how do you design error codes and error messages? How the error message is returned. Here's a simple scenario to illustrate. For example, now we have a UI module (interface module) and a Algo module (algorithmic module) whose c

Use bonnie++ to Test system IO speed

. Checking for algo.h ... yes Checking Algo usability ... no Checking Algo presence ... no Checking for algo ... no Configure:creating./config.status Config.status:creating Makefile Config.status:creating bonnie.h Config.status:creating port.h Config.status:creating Bonnie++.spec Config.status:creating bon_csv2html Config.status:creating Bon_csv2txt Config.status

Use bonnie++ to Test system IO speed[revision]

algo.h ... yes Checking Algo usability ... no Checking Algo presence ... no Checking for algo ... no Configure:creating./config.status Config.status:creating Makefile Config.status:creating bonnie.h Config.status:creating port.h Config.status:creating Bonnie++.spec Config.status:creating bon_csv2html Config.status:creating Bon_csv2txt Config.status:creating Sun/

LIKE fuzzy query and REGEXP usage in SQL

This article introduces in detail the usage of LIKE fuzzy query and REGEXP in SQL and some usage of special characters. For more information, see. This article introduces in detail the usage of LIKE fuzzy query and REGEXP in SQL and some usage of special characters. For more information, see. When searching for data in a database, the SQL wildcard can replace one or more characters. The SQL wildcard must be used with the LIKE operator. In SQL, you can use the following wildcard characters: Wi

SQL fuzzy query

: Search for the "B" value in the Name field of Table.Code in Access: 1 Select * from a where name like '* B *' SQL Server Query analyzer codeSelect * from a where name like '% B %' then you will find the relevant records in Access, but you cannot find the '*' which must be '%, the reason is that the Access fuzzy query is '? ','*'Different from SQL serverThe above is only the code in the database. If you want to write it in the program, you cannot use. '*', or '%'Program:StrSql = "select * from

Here are 101 reasons not to buy Windows Phone 7.5

84. Phone will wake up and display sms content on lockscreen when locked-a privacy violation. 85. Phone can be rebooted without entering security code. Features even dumb phones have but wp7.5 doesn't86. No Bluetooth file transfer. 87. Cannot handle ussd codes necessary for prepaid users to obtain services. 88. Cannot filter call history into missed CILS, received CILS, dialled CILS, recent CILS, etc 89. No way to backup or export call history 90. Cannot show call duration in call history. 91

Summary of simple scene modes set by WinCE ~

Recently, I want to create a scenario, but simply implement three states: normal volume, vibration, and mute. Originally, it would not be very difficult to think about such a simple one. If no relevant function is found at the beginning, the Registry changes will be captured to implement these three states. The results can be implemented in these three states. Haha, I learned several useful registry items. Hkcu/controlpanel/notifications/shelloverrides: mode. 0 indicates normal, 1 indicates vibr

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