common knowledge book

Class Name extends ThreadClass name implements RunnableRecommendation: Using interfacesBenefits: Avoid single inheritance restrictions, not conducive to resource sharingBasic Test Framework JUNIT3: The purpose of junit design is to analyze code units JUNIT4: Supports annotation compared to JUNIT3 TestNG: Intended use for advanced testing, support labeling, surface notation similar to JUNIT4 Common assertions: Assertequals,as

Try {9Thread.Sleep (7);Ten}Catch(interruptedexception e) { One e.printstacktrace (); A } - } - } the}Background Thread1 /**2 * Created by 123 on 2017/07/02.3 */4 Public classMythreadsextendsThread {5 @Override6 Public voidrun () {7 for(inti = 1; I ) {8SYSTEM.OUT.PRINTLN ("Thread 1" + i + "Second execution");9 Try {TenThread.Sleep (7); One}Catch(interruptedexception e) { A e.printstacktrace (); - } - } the

Newillegalargumentexception (); TenLower =value; One } A - Public voidSetupper (intvalue) { - if(Value Lower) the Throw Newillegalargumentexception (); -Upper =value; - } -}Although lower and upper are declared volatile, setlower and setupper are not thread-safe methods. Assuming that the initial state is (0,5), calls Setlower (4) and Setupper (3), two threads intersect, and the final result may be (4,3), violating the constraint. The solution to thi

This article describes some error-prone knowledge points that I have collected and sorted out during the JavaScript process. They will be divided into variable scopes, type comparisons, this points to, function parameters, the six aspects of closure and object copy and assignment are introduced and explained in a simple way. Some ES6 knowledge points are also involved. 1. variable scope var a = 1; function

C # beginner's knowledge about the code framework, annotation methods, common shortcut keys, and variable declaration methods,Preface After learning the VB language, I soon began to learn another language. Yes, this language is c #. He and VB have many things in common, first, let's take a look at c!Overall content c #,. net, Java C # is a programming language th

Common debian knowledge-Debian information of the Linux release-details are as follows. // Obtain Dynamic DHCP # Start the system to activate the device. # Loop address. Auto lo Iface lo inet loopback # Start the system to activate the device. # Set eth0 to DHCP. Auto eth0 Iface eth0 inet dhcp // Obtain the Static data # Start the system to activate the device. # Set eth0 to Static. Auto eth0 Iface eth0 in

algorithm)Feature Selection (Feature selection algorithm):Mutual information (Mutual information), Documentfrequence (document frequency), information Gain (information gain), chi-squared test (Chi-square test), Gini (Gini coefficient).Outlier Detection (anomaly detection algorithm):Statistic-based (based on statistics), distance-based (distance based), density-based (based on density), clustering-based (based on clustering).Learning to Rank (based on learning sort):Pointwise:mcrank;Pairwise:ra

)Feature Selection (Feature selection algorithm):Mutual information (Mutual information), Documentfrequence (document frequency), information Gain (information gain), chi-squared test (Chi-square test), Gini (Gini coefficient).Outlier Detection (anomaly detection algorithm):Statistic-based (based on statistics), distance-based (distance based), density-based (based on density), clustering-based (based on clustering).Learning to Rank (based on learning sort):Pointwise:mcrank;Pairwise:rankingsvm,r

]; - - intCheckintx) + { -memset (Vis,0,sizeof(Vis)); +Memset (Times,0,sizeof(Times)); All mul=1; at for(intI=1; iMoD; - for(intI=1; i) - for(intj=x;j) - { -ll nowhash= (hash[i][j]-(hash[i][j-x]*mul)%mod+mod)%MoD; - if(vis[nowhash]!=i) in { -times[nowhash]++; tovis[nowhash]=i; + if(times[nowhash]==n)return 1; - } the } * return 0; $ }Panax Notoginseng - voidInit () the { +Minl=0x7fffffff; Ascanf"%d",n);

Some common information about UIButton: Create button UIButton *button = [UIButton buttonwithtype:uibuttontypecustom]; /* Uibuttontype button type: (the first two are common types) Uibuttontypecustom = 0,//No button type//custom type UI Buttontypesystem Ns_enum_available_ios (7_0),//Standard system button//system type, std type uibuttontypedetaildisclosure, Uibuttontypeinfolight, Uibuttontypeinfodar

algorithm), GA (Genetic algorithm genetic algorithm)Feature Selection (Feature selection algorithm):Mutual information (Mutual information), Documentfrequence (document frequency), information Gain (information gain), chi-squared test (Chi-square test), Gini (Gini coefficient).Outlier Detection (anomaly detection algorithm):Statistic-based (based on statistics), distance-based (distance based), density-based (based on density), clustering-based (based on clustering).Learning to Rank (based on l

common role of intent tool class "FileUtils" gets the SD card root directory, read and write files, move, copy, delete files, get file name, suffix name action class "Filesizeutil" to get the size of a folder or file "Getpathfromuri4kitkat "Android 4.4 KitKat above and below based on URI get path method" Assetsutils "read assets, Res/raw,./data/data/Package Name/directory file" Antziputils " Ant-Based Zip compression decompression Tool class "Resdraw

startup item by LN–S/CSVN/BIN/CSVN-HTTPD S99CSVN_HTTPD and rebooting the system to see that the service is loaded at startupOne) Httpdapache configuration forwardingProxypreservehost onServerAdmin [email protected]ServerName search.cd-host.netDefaultLanguage ZH-CNAdddefaultcharset Utf-8proxypass/http://www.missworld.cn:8888/proxypassreverse/http://www.missworld.cn:8888/Start the light httpd with its own fastcgi:spawn/usr/local/webserver/php/bin/spawn-fcgi-a 127.0.0.1-p 10080-c 64-u www-f/usr/lo

This paper briefly sums up the common knowledge points in the development of CodeIgniter. Share to everyone for your reference, specific as follows: Jump: $this->load->helper (' url '); redirect (); Constant definition: config/constants.php About language files: Just say my own way. To unify management error information decide to make a error_lang.php Create a new folder under Applicatio

Common distribution of knowledge points for machine learning and data mining Common Distribution (common distribution): Discrete distribution (discrete type distribution): 0-1 distribution (0-1 distribution) Definition: If a random variable x x only takes 0 0 and 1 12 values, and its distribution law is P{X=K}=PK (

Some common Oracle knowledge points below are some common small ORACLE knowledge points for your own search and review, to be further supplemented ........ www.2cto.com 1. Open the trace file $ tail-f $ ORACLE_BASE/admin/SID/bdump/alert_SID.log 2. archive the log SQL> alter system archive log current; manually archive

This article mainly introduces common basic knowledge Reinforcement Learning for JavaScript. For more information about JavaScript, see the following: JavaScript is a literal-literal scripting language. It is a dynamic, weak, prototype-based language with built-in support types. Its Interpreter is calledJavaScript EngineIt is a part of the browser and is widely used in the script language of the client. It

A summary of common knowledge points of CodeIgniter and a summary of codeigniter This article briefly summarizes common knowledge points in CodeIgniter development. We will share this with you for your reference. The details are as follows: Jump: $this->load->helper('url');redirect(); Constant definition: Config/consta

Summary of common PHP knowledge points: 1. The difference between echoprintprint_r: Echo is a PHP statement, and print and print_r are functions. The statement does not return values. the function can return values. Print can only Print values of simple type variables. Print_r can print complex variable values (arrays or objects) Echo to output one or more strings. 2. Summary of

Summary of common PHP knowledge points: 1. The difference between echoprintprint_r: Echo is a PHP statement, and print and print_r are functions. The statement does not return values. the function can return values. Print can only Print values of simple type variables. Print_r can print complex variable values (arrays or objects) and summarize common PHP