how to start freelancing programming

In Ruby, everything is an object. This is very popular for users who like to use highly object-oriented languages (such as Smalltalk, Eiffel or clos. For example, 1, 2, 3, or 10.8 are all objects, rather than the original type in Java or C ++. strings are objects, and classes and methods are also objects. For example, the following are all valid Ruby code (in ruby, the annotation line is defined by the "#" symbol ): # Absolute value of Object-34-34.abs# Rounding a floating point number

/shFor ((i=0;iDoEcho $iDonechmod u+x for.shfor.sh9. Custom functions:Function name () {....}The last line statement is the default return valueWhen referencing a custom function file, use the source func.sh------------------VI func.sh#!/bin/shfunction dat () {Date +%y-%m-%d}Datchmod u+x func.shfunc.shVI func.sh#!/bin/shfunction dat () {Date--date= "Days Ago" +%y-%m-%d}DAT 2func.sh---Output date 2 days before the current time-----------------Refer to func.sh in test.sh:VI test.sh#!/bin/shSOURCE f

-coordinate. Copy the previous grid values, write the code to print out the image ... Oo. Oo... Ooooooo. Ooooooo ... Ooooo ..... Ooo....... O.... Tip: You need to use loop nesting loops, print out grid[0][0], then grid[1][0], then grid[2][0], and so on, until Grid[8][0]. This completes the first line, so the next line is printed. The program will then print out grid[0][1], then grid[1][1], then grid[2][1], and so on. The program finally prints out grid[8][5]. Also, if you do not want to autom

thread, and futuretask these are implemented on the cornerstone of Runnable, Callable must rely on other classes that support it to execute, or it will not have a half-dime relationship with the thread. It is very helpful to understand the usage of some high-level, otherwise it is not known why. Just like if you do not know the TCP protocol, in the Java network programming, for some strange phenomenon, you do not know is the underlying protocol, or J

I. the analysis before programming should be a message board, and we also decided to adopt the database method, so we should start from the following steps: 1. enter the location where the message is written? 2. after the message is sent to the text box I. analysis before programming To make a message board, we also decided to adopt the database method, so we sho

Game programming notes-start (2) 2. Drawing in a window After reading the analysis above, I think many of my friends can't wait to learn this part of knowledge because the above knowledge is too simple, as long as you are familiar with algorithms, you can understand them. The key is that everyone is suffering from a brave hero! After learning algorithms for N years, I did n to algorithm questions, but I c

action frames, allowing its action frames to repeatedly playcurrentframe++; if(Currentframe >= 12) {Currentframe= 0; }} @Override Public voidrun () { while(flag) {LongStart =System.currenttimemillis (); Mydraw (); Logic (); LongEnd =System.currenttimemillis (); Try { if(End-start ) {Thread.Sleep (-(End-start)); } } Catch(interruptedexception e) {e.printstackt

A while ago, I completed both the ant colony algorithm and the improved K-means algorithm, and then watched Cuda programming. I read the introduction of Cuda and thought that Cuda would be easy to use after C, in fact, you still need to know some GPU architecture-related knowledge to write a good program. After reading this book "Cuda for GPU high-performance computing", I feel that it is more like a manuscript, and I have sorted out a book from the p

After learning a lot of windows SDK programming knowledge, it is proposed to use Win32 SDK (pure API, non-MFC) to write windowsProgramNow.Preparation: C language (C ++ is better), VC ++ 6.0 (because it is simpler, you can also use vs2010 to wait ). because VC ++ 6.0 is too old, it does not support some new features of C language (such as the definition location of variables), so we will use it here (and later. preparation of CPP formatSource codeBut b

" otherbuttontitles:nil];[ Alert show]; [Alert release];}} Code Description:The progress property of the Uiprogressview control is the 0.0~1.0 annoying range. 0.0 time at the beginning of the position, 1.0 is the progress to 100%. Shimen the main contribution, respect the work of the author, please do not reprint. If the article is helpful to you, you are welcome to donate to the author, support the Shimen, donate the amount at random, ^_^ I want to donate: Click Donate Cocos2d-x so

("DrawText", 10,15, paint); //--Draw pixel pointsCanvas.drawpoint (10,20, paint); //--Draw multiple pixel pointsCanvas.drawpoints (New float[]{10,30,30,30},paint); //--Draw a lineCanvas.drawline (10,40,50,40, paint); //--draw more than one lineCanvas.drawlines (New float[]{10,50,50,50,70,50,110,50},paint); //--Draw RectangleCanvas.drawrect (10,60,40,100, paint); //--Draw Rectangle 2Rect rect =NewRect (10,110,60,130); Canvas.drawrect (Rect,paint); //--Draw rounded rectanglesRECTF

Start with block 2 in IOS block programming guideGetting Started with Blocks (start block) The following sections help you to get started with blocks using practical examples.Next, we will take a practical example to help you start blocks. Declaring and Using a Block (define and use block) You use^Operator to declare a

Android.content.sharedpreferences;import Android.preference.PreferenceManager; Import Android.util.log;public class Bootreceiver extends Broadcastreceiver {private static final String TAG = "Bootreceiv Er-xxxxxxxxxx "; @Overridepublic void OnReceive (context context, Intent Intent) {Alarmmanager Alarmmanager = ( Alarmmanager) Context.getsystemservice (Context.alarm_service); Pendingintent operation = Pendingintent.getservice (context, 0,new Intent (context, Weatherservice.class), Pendingintent.

This article mainly introduces how to start Python programming with PyCharm and Visual Studio in Windows. These two software are also representatives of Python IDE in Windows. if you need it, refer to setting up a python development environment in Windows. First, go to the python official website to download the environment. Move the cursor to the Downloads tab, where you can download it. The python enviro

Start Python programming with PyCharm and Visual Studio in Windows, and use pycharmpython Build a python development environment in Windows First, go to the python official website to download the environment. Move the cursor to the Downloads tab, where you can download it. The python environment is still very user-friendly. There are not so many redundant configurations or anything. After downloading the e

fromSelenium.webdriver.common.byImport by fromTimeImportSleepuserid=input ('username') Passid=input ('Password') Sendtxt="Hello"#Message ContentSendto=input ('SendTo')#Open FirefoxDriver =Webdriver. Firefox () Driver.get ('http://mail.10086.cn/')#Email Address#fill in the user nameEmailelem = driver.find_element_by_id ('Txtuser') Emailelem.send_keys (userid)#User name#fill in the passwordPasswordelem = driver.find_element_by_id ('Txtpass') Passwordelem.send_keys (PASSID)#PasswordPasswordelem.su

j2ee| programming to create Java EE application You cannot deploy an enterprise component (EJB) directly to the Java server, you must add the component to a Java application and then deploy it. In this section, you will create a new Java EE application called Converterapp and save it as a converterapp.ear. 1. Start the Java server at the command prompt: EE verbose (Stop Server command j2ee-stop.)

execution in current child thread//postinvalidate (); You can loop through a child thread to invoke executionInvalidate ();//Redraw the canvas return Super. OnKeyUp (KeyCode, event); } /*** Override touch-screen event functions*/@Override Public Booleanontouchevent (Motionevent event) {//gets the x-coordinate assignment of the user's finger touch screen and the text intx = (int) Event.getx (); //Gets the y coordinate of the user's finger touch screen and the text inty =

(Exception ex) {}finally { if(canvas!=NULL) {sfh.unlockcanvasandpost (canvas); } } }The Paint brush class provides an anti-aliasing function, in fact the canvas canvas also provides the amount of plot antialiasing functions, as follows:Canvas.setdrawfilter (Drawfilter filter);Function: Set drawing antialiasing for the canvasParameters: Drawing Filter InstanceInstantiate an object of the Drawfilter class, as shown in the following code:New Paintflagsdrawfilter (0,paint.anti_a

#!/usr/bin/env python3.52#Coding:utf-83#4#The main purpose of this project is the processing of strings, the simple format of the output5 Tabledata = [['Apples','oranges','Cherries','Banana'], 6 ['Alice','Bob','Carol','David'], 7 ['Dogs','Cats','Moose','Goose']] 8#The required output is as follows:9#Apples Alice Dogs10#Dranges Bob Cats11#Cherries Carol Moose12#Banana David Goose13 14#no output format, output format is all right-aligned15defprinttable (data):Str_data ="'Col_len = [] 18 forRowi