A twinkle twinkle sparkling, all over the sky are small stars, hanging in the sky to put light, like many small eyes. Don't ask me why I like this song, I will not tell you because someone used the harmonica to listen to me.I. Python learning
First, the Common DOS command1. Dir: List the files and folders in the current directory2. MD: Create directory3. RD: Delete directory4. CD: Enter the specified directory5. cd. : Back to the top level directory5, cd\: Back to the root directory6.
1. Software: System software vs application Software2. People interacting with computers: using computer language.Graphical interface vs command line mode dir MD Rd CD CD: Cd/del exit3. Classification of languages: first generation: Machine Language
In JS is case-sensitive
Test and test are not a thing.
Identifier
The so-called identifiers are names of variables, arrays, functions, etc.
Hard requirements: By numbers, letters and underscores and $ ,
Ctrl +/single-line comments, canceling single-line commentsCtrl + D Delete Current line Ctrl + 1 quick fix Error CTRL + O open current file outline, quick navigate to method, class Ctrl + E Quick Select Open file editing bounds Face Ctrl + M edit
Modify FontWindow->preferences->general->appearance->colorsandfonts->basic->text Font
Next tab=4 a space in eclipse
alt+/Auto Completion (SYSO standard output main Main method)
CTRL+F11 Code Execution
Ctrl+d Deleting rows
Alt+↑↓
[Object Object] [Object Object] [Object Object] A single-line comment to begin with, for example: [Object Object] [Object Object] [object object]print 6 Output 6 [Object Object] [Object Object] [obj The note for ECT Object]python is a workaround
This tutorial is a summary of the author's self-taught ios/swift knowledge, which applies to the application of objictive C programming and the need to understand the iOS program-based iphone and ipad programmer. Be a bigger ' siege lion ', work
1, what is programming? Why do you want to program?A: Programming is a verb, programming is equivalent to writing code, then write code for what? That is why programming, it must be to let the computer to help us do things, the code is the computer
The code is as follows:public class Example014 {public static void main (string[] args) {/** * It's a test for \utest. *///\u0022 are double-quoted Unicode Escape character System.out.println ("a\u0022.length () + \u0022b". Length ());}}Result
I. BASIC formatIndent inRecommended 4 spaces per level, can be set to the editor tab = 4 spaces, automatic conversionSemicolonDo not omit the semicolon to prevent the ASI (auto-insert semicolon) errorLine widthEach line of code is less than 80
Python BasicsOne, note (#)The Python comment statement starts with a "#" character, and the comment can start anywhere on a line, and the interpreter ignores everything after the line #.
Single-line Comment: 1 print ' Hello, world! ' #
First day of the learning processJava Overview "Computer-java Introduction"--------Java Classic Instance "Path environment configuration, HelloWorld"-------------Java Basics "keyword, identifier, comment, HelloWorld comment complete"Ii. Overview of
Comment Classification line Comment Multiline comment function use your own familiar language, in the program to annotate some code, enhance the program readability line Comments (line comments) Start with #, #右边所有的东西就被当成说明文字, rather than the
Java annotationsComments are for people, not for computers. Java has 3 types of annotationsSingle-line comment, executed to the bank, will not be executed/**/Multiline Comment/* Comment content Write middle *//** */Document comment,/** comment
Analytical:onMouseOver: The event that is triggered when the mouse enters the specified object.onMouseOut: The event that is triggered when the mouse leaves the specified object.OnKeyDown: The event that is triggered when the keyboard key is pressed.
Command-line method:in the Phpdocumentor directory, the input phpdoc–h gets a detailed parameter list, with several important parameters as follows:-f file name to be parsed, multiple files separated by commas-D directories to parse, multiple
First, the founder and history of PythonGuido van Rossum, 1989 Python was born.1991, a Python compiler was born, he was implemented in C language, and be able to call the C language library file.2008 Python launched version 2.6 and 3.0, since the 2.6
First of all, it is very convenient for beginners to set up multiple programs in a project, which can facilitate the practice and testing of different knowledge points.For commercial projects, there is usually only one Python program that can be
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