wikipedia entry

C language entry: 04. Data Type, constant, variable, language entry 04I. Data 1. What is data? We are always dealing with data, such as weight data, blood pressure data, and stock price data. When we use computers, we will be exposed to a variety of data, including document data, image data, and video data, there are also text data generated during chatting on QQ, and file data downloaded by thunder.2. Data

[C Entry, c Entry The code for this series of notes is encoded and tested under Ubuntu 14.04 for no reason, because my laptop only has one Ubuntu system, the only third-party library SDL used is open-source and cross-platform. So even if you are using Windows or Mac, you can run all the code. 1. Install the SDL library and its extension Ubuntu: Sudo apt-get install libsdl2-devsudo apt-get install libs

GCC compiler entry [reprint], gcc compiler entry reprint The GCC Compiler (gnu c Compiler) is an open-source Compiler organized by GNU. It is the default C language Compiler in Linux. It can compile other languages in addition to the C language efficiently. In addition, GCC now includes not only the compiler itself, but also the tool chain in the compilation process. 1. GCC compilation process Before learn

{Code ...} then I inserted a piece of data: insertintoqq (id, num) values (); I created another table and set a foreign key pointing to the id of the qq table {code ...} I inserted a piece of data {code ...} but when I insert the second data record, an error occurs {code ...} ERR... create table qq(id int primary key not null auto_increment,num varchar(15) not null); Then I inserted a piece of data:Insert into qq (id, num) values (1,5555 ); I created another table and set a foreign key pointing

Log4net entry (HELP) and log4net entry help In the previous sections of the Log4net getting started file, we need to write the following code in the log4net class: 1 private static log4net. ILog log = log4net. LogManager. GetLogger (System. Reflection. MethodBase. GetCurrentMethod (). DeclaringType ); If multiple classes use log4net to output log information, write this line of code in each class. To avoid

Recommendation System-from entry-level to proficientIn order to facilitate everyone from theory to practice, from entry to proficiency, gradually and systematically understand and master the knowledge of the recommendation system. I made a reading list. You can read this table, and you are welcome to give comments and point out the unspecified classical literature to enrich the needs of various disciplines

Less simple entry, less entry Official Website address Http://lesscss.org/ Less Manual Www.lesscss.net/ Introduction to less on the bootstrap website Http://www.bootcss.com/p/lesscss/I. Build a browser Environment Github: https://github.com/less/less.js1. js Introduction Building a Less learning environment is very simple. You only need to use can be implemented by introducing a processor.The browser trans

Js entry-Dom basics, js entry-dom DOM = jsonentobject Model, Document Object Model. Dom has three different parts. 1. The core DOM is also the Standard Model of the most basic document structure. 2. XMLDOM Standard Model for XML documents 3. Standard html dom model for HTML documents For a new programmer. What HTML is, in fact, not important. But we all know. Html file, which can be opened in a browser. HT

Read Android from entry to entry (17)-progress barProgress bar) Java. lang. Object;Android. view. View;Android. widget. ProgressBar;ProgressBar Class Method ProgressBar example The following describes the most common methods in this class, including setMax and setProgress.1. MainActivity. java package com.sweetlover.activity;import com.sweetlover.progressbar.R;import android.app.Activity;import android.os.B

Android entry (1), Android entry ( Link: http://www.orlion.ga/387/ I. Android system architecture 1, Linux kernel layer, which provides underlying drivers for Android devices The system Runtime Library layer provides main features for the Android system through some C/C ++ libraries. For example, the SQLite Library provides database support, the OpenGL | EL Library provides 3D drawing support, and

Read Android from entry to entry (12)-Automatically complete text boxAutoCompleteTextView) Java. lang. Object;Android. view. View;Android. view. TextView;Android. widget. EditText;Android. widget. AutoCompleteTextView;MultiAutoCompleteTextView;AutoCompleteTextView Class Method AutoCompleteTextView example Complete: http://download.csdn.net/detail/sweetloveft/9408072 The following program mainly describes ho

MVC series-entry, mvc entry The full name of MVC is Model ViewController, short for model-view-controller. It is a Model of software design, organize Code by means of separation of business logic, data, and interface display, and integrate the business logic into a component to improve and personalize the custom interface and user interaction, you do not need to rewrite the business logic. MVC is uniquely d

Linux entry (1)-Basic commands and linux entry commands This series of Linux beginners are the basic content I have summarized on the basis of "laruence's Linux private house dish", mainly to record my learning process, but also to facilitate your brief understanding. Linux Distribution is Ubuntu rather than CentOS recommended in books. We recommend that you install dual systems instead of virtual machines.

MongoDB entry-add, delete, modify, and query-mongodb entry-add, delete Mongodb has been successfully started in the previous blog: continue. Open another cmd and enter the [mongo] command to open the shell, that is, the mongodb client. The "test" database is connected by default. Here I set the Set (table) as student. Figure 1: 1. Add insert Syntax: db. Set. insert ({"Col1": "column value 1", "Col2": "co

Laravel 5 framework entry (1): laravel framework entry Laravel 5 Chinese document: 1. http://laravel-china.org/docs/5.0 2. http://www.golaravel.com/laravel/docs/5.0/ Default Condition By default, you already have a well-configured PHP + MySQL runtime environment to understand the basics of running PHP websites. After following this tutorial, you will get a basic simple blog system that includes logon, we wi

MySQL entry (3): mysql entry After writing two articles on MySQL getting started, I found that people who write books are still competent. At least people know how to orchestrate the knowledge points they want to talk about, I really don't know where to say it first, so let me know what to say.1. Write SQL In fact, I don't want to write about SQL, because this part is actually very simple. Basically, in col

Django entry record 2: django entry record 1. Create an app, python manage. py startapp appname 2. design the model and edit the model in the appname/directory. 3. Check the modification of the model. python manage. py makemigrations appname 4. automatically perform database migration and synchronize the database structure. python manage. py sqlmigrate 0001 5. Create a new data table named python manag

Thinkphp entry 2 (46) and thinkphp entry 46[Empty Operation Processing] See the following figure: A user accesses an operation that does not exist. Solution: Define the _ empty () method for each controller to process the operation. Solution 2: Define an empty operation [Empty module processing] We use a class, but this class is not included yet. We can use the automatic loading mechanism to process _ autol

Entry to transcription groups (1): software installation and entry to transcriptionHISAT Wget ftp://ftp.ccb.jhu.edu/pub/infphilo/hisat2/downloads/hisat2-2.1.0-source.zipUnzip hisat2-2.1.0-source.zipCd hisat2-2.1.0Make # install g ++ and gcc before using sudo apt installRm-f *. h *. cppSamtools Wget https://github.com/samtools/samtools/releases/download/1.5/samtools-1.5.tar.bz2Tar xvfj samtools-1.5.tar.bz2

Kotlin entry-coroutine internal mechanism, kotlin entry coroutineSuspension Function ?? A new type of function that appears after the coroutine is exposed. A function modified with a special modifier suspend is called a suspension function. A suspended function can only be called in the coroutine and other suspended functions. It cannot be used in other functions. To start a coroutine, it is necessary to su