dwdm basics

Python basics 1 and python Basics Start python Summary: 1. Introduction to python Ii. Installation 3. The first python Program Iv. Variable and character encoding V. user input Vi. Data Types 7. All objects 8. Data Operations 9. if else process judgment 10. while Loop 11. for Loop 12. break and continue 1. Introduction to python Python introduction: Python is the famous Guido van rosum (Guid

SpringMVC basics- ing problem, springmvc basics ing I. SpringMVC uses RequestMapping to solve the ing problem. 2. Before learning RequestMapping, Let's first look at a picture. This figure shows the request URL, request Method, request header, and request body contained when an http request is sent. The figure is clearly marked. Iii. RequestMapping 1. The translation is request ing. In my opinion, the ing

JQuery BASICS (2) $ and jQuery basics in jquery In jQuery, $ is the most commonly used symbol, which provides a variety of functions. This includes selecting one or more elements on the page, prefix of functional functions, perfection of windows. onload, and creation of DOM nodes. This document describes how to use jQuery. As the foundation 1. Selector In css, selector is used to select a class (Category se

Jquery basics and jquery Basics The first is that js loads the jquery library and must be written. The second is js that implements this function, Function: click this button. $ (Document). ready (function () {}); after the page is loaded. $ ("Button"). click (function () {}); after the html page element of the button is clicked. $ ("P"). hide () ;}); select this element of the html page element

Automated Testing basics-Selenium iframe problem locating, basics-seleniumSometimes we find a phenomenon on the way to positioning. The elements are there, but we cannot determine the location. At this time, we need the particularity of the specific webpage. This section describes how to handle iframe. I. Differences between frame and iframe: The functions of Frame and Iframe are basically the same, but Ifr

Python BASICS (13th) and python Basics The re module contains regular expressions. This chapter introduces the main features and regular expressions of the re module. What is a regular expression? A regular expression is a pattern that can match a text clip. The simplest regular expression is a normal string that can match itself. In other words, the regular expression 'python' can match the string 'pytho

for(inti=0;i) {System.out.println (Thread.CurrentThread (). GetName ()); Random ran=NewRandom (); intA1=ran.nextint (1000); Try{thread.sleep (A1); } Catch(interruptedexception e) {//TODO Auto-generated catch blockE.printstacktrace (); } } }}Importcom.hanqi.test.Test03; Public classTest04 { Public Static voidMain (string[] args) {//multithreading for starting interface mode//cannot be started directlyTest03 t3 =NewTest03 (); //you need to construct thread to give him an instanc

', ' email ': ' [email Protected] ', ' gender ': ' Man '}, {' username ': ' cc ', ' email ': ' [emailprotected] ', ' gender ': ' Male '}, {' username ': ' tt ', ' Email ': ' [emailprotected] ', ' gender ': ' Female '}]def Home (Request): If request.method== "POST": U = Request. Post.get ("username"); E = Request. Post.get ("email"); g = Request. Post.get ("gender"); temp = {' username ': u, ' email ': E, ' Gender ': g} user_list.append (temp) return render (Request, "home.h

(savedinstancestate); Setcontentview (R.layout.activity_main); //instantiation asynctask Asynctasktest test = new asynctasktest (); //start background thread test.execute (); //main thread perform task: Output Hello,world in log LOG.D ( "mainactivity" , "Hello, World" ); }}The output in the log after execution is:The first thing to do is onpreexecute, which is responsible for initializing the parameters and executing them in the UI thread, and then outputting the "Hello, World" output

not be able to respond to screen rotation. In this case, you have to correlate two directions that need to change and allow the user to switch between them until they begin to apply the main task. Start the main task, and then start responding to the device's movement. (WTF, this translation can not understand) 2.3.3 to communicate with layouts (using layout to communicate)The layout is not just a UI element in the interface, but through the layout, you can tell the user what information i

the ability to look for a string that ends with ". Scala" from a set of strings, but skips a string that begins with "-".int I=0;boolean foundit=false;while (i In Scala, you typically use the following method to implement break.1. Use a Boolean control variable.Example: Use the IF and Boolean variables below to step through the implementation using Scala (not using break and continue) as follows:var I=0var foundit=falsewhile (i 2. Use recursive functions. (Return statement is still not recommen

Clr basics (1), clr basics ( The managed code compiled by C # is managed by the Common Language Runtime (CLR). Therefore, to run C # programs, you must install the. NET Framework on your computer. To check whether the. NET Framework has been installed, check whether the mscoree. dll file exists in the system directory (C: \ Windows \ System32, if the drive C is a system disk. This file exists, indicating th

Clr basics (2): clr Basics If you have compiled a Program. cs code file, run the following command in the Visual Studio command prompt tool:Csc.exe/out: Program.exe/t: exe/r: mscorlib. dll Program. csThis command line indicates that the csung compiler generates an executable file (/out: Program.exe) named Program.exe ). The generated file belongs to the Win32 console application type (/t [target]: exe ).A h

allows the//code to compile. However, at run time, the CLR does know//What type O refers to ( each time the cast is performed) and//it checks whether the object World抯 type is an Employee or any type//That's derived from Employee.Employee e =(Employee) o; } Public Static voidPromoteEmployee2 (Object o) {if(O isEmployee) {Employee e=(Employee) o; //Use e within the remainder of the ' if ' statement. } } Public Static voidPromoteEmployee3 (Object o) {Employee e= O asEmployee; if(E! =

Ajax BASICS (1) and ajax Basics What Is Ajax? Before studying ajax, let's first discuss a question-what is Web 2.0. When you hear the word Web 2.0, you should first ask "What is Web 1.0 ?" Although few people mentioned Web 1.0, it actually refers to the traditional Web with completely different request and response models. For example, click a button on the hdu.edu.cn website. Then a request is sent to the

Java basics 11 and java basics 11 Import java. util. encode; public class Eleventh {/* returns a positive integer of no more than five digits. First, calculate the number of digits. Second, print the numbers in reverse order. (5 scores) */public static void main (String [] args) {empty input = new empty (System. in); System. out. println ("enter a positive integer of no more than five digits:"); int a = in

Java basics 10 and java Basics Import java. util. strong; public class Tenth {/* has n integers, so that the numbers in front of them are shifted to the following m positions, the last m count is the first m count */public static void main (String [] args) {variable input = new variable (System. in); System. out. println ("the number of digits you enter is:"); int a = input. nextInt (); int [] array = new

. println ("222"); test. divde (3, 4 );}} public class TestOverLoad{public static void main(String[] args){Test test = new Test();//test.print(null); Object obj = null;String str = null;StringBuffer strBuffer = null;System.out.println(obj);System.out.println(str);test.print(obj);test.print(str);test.print(strBuffer);test.print(null);} }class Test{public void print(Object some){System.out.println("Object version print"); }public void print(String some){System.out.println("String version print")

Data Structure BASICS (21), data structure basics 21DFS Start from a vertex V0, access the vertex, and then search for the traversal graph from each unaccessed adjacent vertex of V0 in sequence, until all vertices having the same path with V0 in the figure are accessed (using the stack ). // The depth of the undirected Graph stored using the adjacent matrix preferentially traverses the template BFS Sta

Data Structure BASICS (18) and data structure basics 18Hash table Based on the set hash function H (key) and the selected method for handling conflicts, a set of keywords are mapped to a finite continuous address set (interval, the keyword "image" in the address set is used as the storage location of the corresponding record in the table. In this way, the searched table constructed is called a "hash table "