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Redis Series Learning (iii) Java API access and transactions One introduction two business examples supplement three watch order first, the introduction This article provides examples of transactions in the article "Redis Series Learning (iii) Java API access and transactions" , supplementary No business. private void Testtransaction () { System.out.println ("====================== test transacti

before invoking it. public class MySource { public event EventHandler MyEvent; public void FireEvent () { EventHandler temp = MyEvent; if (temp!= null) { Temp (this,eventargs.empty); } } } 39. Do not provide public event member variables, but instead use event accessors. Don't provide public event member variables. Use event accessors instead. public class MySource { MyDelegate m_someevent; Public event MyDelegate Someevent { Add { M_someevent + = value; } Remove { M_someevent = value; } } } 40

How RAC Works and related components (iii) Overview: write down the original intent and motivation of this document, derived from the Oracle Basic operating Manual of the previous article. The Oracle Basic Operations Manual is a summary of the author's vacation on Oracle's foundational knowledge learning. Then form a summary of the system, a review review, the other is easy to use. This document is also derived from this text. Before reading

role of Handler is two:1. Sending messages in a newly-started thread2. Get and process messages in the main threadThe messages processed by handler originate from MessageQueue, and MessageQueue is managed by loop.The process by which a child thread needs to perform a UI action is when a child thread adds a message request to the Cheng thread's MessageQueue at the end of MessageQueue, and then gets the message back to the Handlemessage function in the thread to perform the processing action.To i

display the white status icon,When you inherit from a Material theme, you customize the color when you set the status bar: Android:statusbarcolor. By default, Android:statusbarcolor inherits the Android:colorprimarydark.You can draw the status bar yourself. For example, if you want to display the status bar clearly in a photo, use a subtle black gradient to make sure the White status bar icon is visible. To do this, set the Android:statusbarcolor property to @android:color/transparent and adjus

3.C language Features//3.1 function definition//function return type function name (parameter) {//dosomthing//} General function definitions are like this,//There is an ancient function definition, and another line to explain the parameters of void Printmesg (ms g,loopnum) int loopnum; int msg; {int i; for (i = 0;iiOS Getting Started Tutorial (iii)-C language Features

the dial is successful, one is called when the network is disconnected:Ip-up-datakey：#!/system/bin/shcase $ in ppp1) /android/bin/iptables--flush; /android/bin/iptables--table Nat--flush; /android/bin/iptables--delete-chain; /android/bin/iptables--table Nat--append postrouting--out-interface ppp0-j Masquerade; /android/bin/iptables--append FORWARD--in-interface ppp1-j ACCEPT; echo 0 >/proc/sys/net/ipv4/ip_forward; echo 1 >/proc/sys/net/ipv4/ip

based on a certain understanding and understanding of the WebView control, we can continue to study this control, this article mainly describes how to make WebView and progressdialog combination. The WebView component supports loading Web pages directly and can be viewed as a browser, with the following steps:1. Create a new XML layout file as follows: 2. Initialize the control and set the corresponding parameters in the main activity 3. If you need to add access to the Internet in Androidmanife

, after the successful registration, the authentication password:1 //after successful registration, authentication user password2-(void) Xmppstreamdidregister: (Xmppstream *) Sender3 {4[Self Alterwithtip:@"User Registration Successful"];5 6 //Certified user name and password after successful registration7Nserror *error =Nil;8[Self.xmppstream AuthenticateWithPassword:self.passwordTextField.text error:ERROR];9 if(Error) {TenNSLog (@"Authentication Error%@", [Error localizeddescription]

EF addition, deletion, query, and modification (iii) ------ release version, ef release version 1. Add 1 # Add student information in region 1.1 (defined as Int type, and the number of affected rows is returned) 2 /// 2. Delete 2.1 Delete based on user ID 1 # region 2.0 Delete 2 // 2.2 Delete based on conditions Actually, a lambda expression is passed in the where method, and the lambda expression is essentially an anonymous function. 1 # region 2.1

* variables to hold registered instances*/ Private Static $_objects=Array(); /** * Register an instance into the Registrar * @param string $name The class name to register * @param object $obj class instance to register * @return true*/ Public Static function_set ($name,$obj){ if(!isset(Self::$_objects[$name]) { self::$_objects[$name] =$obj; } return true; } /** * Remove an instance from the Registrar * @param string $name The class name to register * @return true*/

] TRACE com.lf.testlog4j.hellolog4j-exiting application.You can control how different Java classes are exported by configuration. For example, I want to set the output level of bar to trace, and the output level of other classes is error, configured as follows:Loggers> Loggername= "Com.lf.testLog4j.Bar" Level= "Trace"additivity= "false"> Appenderrefref= "Console"/> Logger> Root Level= "Error"> Appenderrefref= "Console"/> Root> Loggers>The outp

Scheduledthreadpoolexecutor (1); Exec.scheduleatfixedrate (new Runnable () {//each time an exception is triggered @Override public Void Run () { throw new RuntimeException (); }}, +, timeunit.milliseconds); Exec.scheduleatfixedrate (new Runnable () {//print the system time every once in a while to prove that the two do not affect each other @Override public Void Run () { System.out.println (System.nanotime ()); }}, +, timeunit.milliseconds); } } Summa

by itself and decide the forwarding path of the uisignal, for example, UIView's forwarding path is the corresponding [view Viewcontroller]; beeuisignal through Beeuisignalbus forwarding, specific forwarding order is more complex, interested classmates can debug code comb clear. However, there are only four options for sending the event: try to give the target class, try to give observer classes, try to give UIView Superview, try to give a class signaltarget ( UIView's Signaltarget is Uivie

implement the query quickly, rather than write SQL query statements, and can be sorted and paged query results, easy to use, powerful. As you can see, the following lines of code can implement complex query functionsDbutils.findall (Selector.from (Student. Class). WHERE ("_id", "" )* pageIndex)) ;Similarly, the data in the database can be easily updated. The following shows the age field for the first record in the table that corresponds to update student. This is relatively simp

private final static int max_size = 3; Maximum number of common threads private final static int queue_size = 20; Thread buffer queue capacity private final static long alive_time = 10; Maximum idle duration allowed by a thread private final static timeunit t_unit = Timeunit.seconds; Idle duration unit: Seconds private static blockingqueue3, adapter writingAt Adpter, we just need to write a few lines of code.Get the path string url = Constant.pic_base_url + news. picurl;//Create tasks Asyncimag

FinalString dictionary_table_create ="CREATE TABLE"+ Dictionary_table_name +" ("+ Key_word +"TEXT,"+ Key_definition +"TEXT);"; Dictionaryopenhelper (Context context) {Super(Context, database_name,NULL, database_version); }@Override Public void onCreate(Sqlitedatabase db) {Db.execsql (dictionary_table_create); }}You can get a Sqliteopenhelper object according to the method you specified, and then call the Getwritabledatabase () and Getreadabledatabase () method to get the Sqlitedatabase o

') Else: Print 'test byebye \ n'Log.write ('test failed \ n') #Open UserInfoDevice.touch (850,68,'down_and_up') Time.sleep (2) UserInfo=device.takesnapshot () userinfo.writetofile (Path+'UserInfo'+ STR (i) +'. PNG','PNG') Ufoture= Monkeyrunner.loadimagefromfile ('D:/pic/tuserinfo.png') if(Userinfo.sameas (ufoture,0.75)): Print 'userinfo pic is the same \ n'Log.write ('userinfo test passed \ n') Else: Print '

() { a = 1;//a1,a2 }C1 prior to C2 execution, there is C1 TB C2 relationship, but from the previous blog, a no visibility, execution A1 data will not necessarily be refreshed in time, B1 the final output can be 0 or 1,c1 HB C2 does not exist. 2.HB does not represent TBA = 1; //a1b = 2; A2according to the rules 1,a1 HB A2, because there is no data association between the two pieces of code (A1 and A2 interchange will not affect the results of the operation), the JVM automati

() method can get the Menuinflater object, the inflate () method that calls it can create a menu for the current activity.The inflate () method receives two parameters,The first one: to specify which resource file we use to create the menu, the R.menu.main menu file is passed in;The second one: Used to specify which menu object our item will be added to, and use the menu parameter passed in directly in the Oncreateoptionsmenu () method.The overridden method returns True, indicating that the men