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- Python operation Mysql example code tutorial
- This article introduces various code examples and detailed introductions such as Python operating MYSQL, executing SQL statements, obtaining result sets, traversing result sets, obtaining a certain field, obtaining table field names, inserting pictures into the database, executing transactions, etc. Most of the code is A sumptuous and beautiful code feast. If you want to view the online version, please visit: https://www.jb51.net/article/34102.htm
- 2024-01-26 0 1364
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- Lucene index optimization Chinese WORD version
- This document mainly talks about Lucene index optimization; this article mainly introduces how to improve the indexing speed of Lucene. Most of the ideas introduced are easy to try, but of course others may increase the complexity of your program. So please confirm that the indexing speed is indeed very slow, and the reason for the slowness is indeed caused by Lucene itself; I hope this document will help friends in need; interested friends can come and take a look
- 2024-02-27 0 1190
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- Adobe official Flash animation optimization guide pdf version
- Tutorials from Adobe's official Flash animation optimization guide, including the following content: How to save memory How to minimize CPU usage How to improve ActionScript 3.0 performance Speed up rendering Speed Optimize network interaction Use audio and video Optimize SQ
- 2024-01-17 5 3654
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- Delphi Language Reference Chinese WORD version
- This document mainly talks about the Delphi language reference; Delphi is a structured, object-oriented, type-robust, high-level language that can be compiled and executed. Its object pascal syntax specification has good readability, fast compilation, and multi-unit modular programs. Design and other advantages. Delphi technology Borland's component framework and rapid development environment. For the most part, this syntax guide assumes you are using Borland's development tools. I hope this document will help friends in need; interested friends can come and take a look.
- 2024-01-18 0 520
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- Introduction to shell programming under Linux system Chinese WORD version
- This document mainly talks about the introduction to shell programming under Linux system; Shell programming has many features similar to C language and other programming languages, but it is not as complicated as programming languages. A shell program is a series of Linux commands and utilities placed in a file. When executed, each command is interpreted and executed one by one by Linux. Interested friends can come and take a look
- 2024-01-27 9 1888
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- Using Python for socket programming Chinese WORD version
- This document mainly talks about using Python for socket programming; as an interpreted language, Python is easy to use and can quickly verify our ideas and develop prototype software. A Python program can be interpreted as a whole or line by line. Friends in need can download and take a look
- 2024-01-23 0 1006
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- OpenMP parallel programming WORD version
- This document mainly talks about OpenMP parallel programming; OpenMP is a collection of compiler instructions and library functions, mainly used for parallel programming on shared storage computers. Currently, the languages that support OpenMP mainly include Fortran and C/C++. OpenMP uses the fork/join parallel mode when executing programs in parallel. Shared storage parallel programs use fork/join parallelism. I hope this document will help friends in need; interested friends can come and take a look.
- 2024-02-29 0 1093
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- The use of multi-threading technology in iOS development WORD version
- This document mainly talks about the use of multi-threading technology in iOS development; the so-called process corresponds to an application, which is responsible for opening up memory space for application use, but the process cannot execute tasks (instructions). A process contains at least one thread, which is the execution flow of the program. When an iOS program starts, while creating a process, it will start running a thread, which is called the main thread; I hope this document will help friends in need; interested friends can come and take a look.
- 2024-02-28 0 1125
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- Introduction to Android Sensor Programming Chinese WORD version
- Contents of this document: Introduction to Android sensor programming, including acceleration sensor (accelerometer), gyroscope (gyroscope), ambient light sensor (light), magnetic field sensor (magnetic field), orientation sensor (orientation), pressure sensor (pressure), distance Sensor (proximity) and temperature sensor (temperature); The learning method of this lecture is still learning in actual combat. It needs to be reminded that it cannot be simulated in the simulator.
- 2024-02-27 0 822
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- Shell scripting basics Chinese WORD version
- Shell itself is a program written in C language, which is a bridge for users to use Linux. Shell is both a command language and a programming language. As a command language, it interactively interprets and executes commands entered by the user; as a programming language, it defines various variables and parameters, and provides many control structures found only in high-level languages, including loops and branches. Although it is not part of the Linux system core, it calls most of the functions of the system core to execute programs, create files, and coordinate the running of various programs in a parallel manner. Therefore, for
- 2024-02-03 6 2665
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- PASCAL language basics Chinese WORD version
- This document mainly talks about the basics of PASCAL language; PASCAL language: the most suitable language for scientific computing and data processing, with the fastest running and compilation speed, from TURBO PASCAL 5.5, 6.0, 7.0 to the current DELPHI in the WINDOWS environment and Object-oriented PASCAL such as LAZARUS, as well as various versions of FREE PASCAL currently used in informatics competitions. I hope this document will help friends in need; interested friends can come and take a look.
- 2024-01-28 0 1086
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- Python introductory tutorial Chinese WORD version
- Python is an efficient language. The reading and writing operations are very simple. Just like ordinary English, Python is an interpreted and executed language. We do not need to compile, we only need to write the code to run. Python is an oriented language. The language of objects, everything in Python is an object. Python is a very interesting language; interested friends can come and take a look.
- 2024-01-25 0 656
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- Big data processing with Apache Spark
- This document mainly talks about using Apache Spark for big data processing - Part 1: Getting Started; Apache Spark is a big data processing framework built around speed, ease of use and complex analysis. It was originally developed by AMPLab at the University of California, Berkeley, in 2009, and became one of Apache's open source projects in 2010. In this first part of the Apache Spark article series, we will learn what Spark is, how it differs from typical Map
- 2024-01-29 0 985
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- Analysis of Android application message processing mechanism Chinese WORD version
- Android applications are driven by messages. The system maintains a message queue for each application. The main thread of the application continuously obtains messages from this message queue (Looper), and then processes these messages (Handler). , In this way, the execution of the application is driven by messages. This article will analyze the message processing mechanism of Android applications in detail. Friends in need can download and take a look
- 2024-02-28 0 1091
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- JSON Getting Started Guide Chinese WORD version
- JSON stands for JavaScript Object Natation. It is a lightweight data exchange format that is very suitable for the interaction between the server and JavaScript. This article will quickly explain the JSON format and demonstrate through code examples how to process JSON format data on the client and server respectively.
- 2024-01-27 0 1127
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- Android seamlessly replaces Dalvik virtual machine Chinese WORD version
- This document mainly talks about the seamless replacement of the Dalvik virtual machine by Android; the Dalvik virtual machine is actually a Java virtual machine, but it does not execute class files, but dex files. Therefore, the most ideal way for the ART runtime is to implement it as a Java virtual machine, so that the Dalvik virtual machine can be easily replaced. I hope this document will help friends in need; interested friends can come and take a look.
- 2024-02-01 0 493
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- Android_Intent detailed explanation WORD version
- This document mainly talks about the detailed explanation of Android_Intent; Intent is an abstract description of the action to be performed. Generally speaking, it is used as a parameter. Intent assists in completing the communication between various components of Android. For example, call startActivity() to start an activity, or broadcastIntent() to pass it to all interested BroadcaseReceivers, or startService()/bindse
- 2024-01-29 2 2470
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- j2me3D game development simple tutorial Chinese WORD version
- This document mainly talks about a simple tutorial on j2me3D game development; Nowadays, 3D graphics are a key part of almost any game, and even some applications have achieved success by using 3D forms to describe information. As mentioned earlier, developing in immediate mode and manually coding all 3D objects is slow and complex. All corner points of polygons in your application must be encoded independently in an array. In JSR 184, this is called immediate mode. I hope this document will help friends in need; interested friends can come and take a look.
- 2024-02-29 0 1640
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- Detailed explanation of Android program debugging Chinese WORD version
- When using eclipse to develop android programs, you can perform breakpoint single-step debugging just like VS. The Eclipse Java editor not only provides developers with common functions such as code writing, syntax correction, and real-time compilation, but it can also quickly modify and reconstruct Java source code and other advanced operations. Interested friends can come and take a look
- 2024-02-26 0 884
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- Web Service Design Based on REST Architecture WORD Version
- This document mainly talks about the design of Web Service based on REST architecture; REST (Representational State Transfer) is a lightweight Web Service architecture style. Its implementation and operation are obviously simpler than SOAP and XML-RPC, and can be completely passed HTTP protocol implementation can also use cache to improve response speed, which is superior to SOAP protocol in terms of performance, efficiency and ease of use. I hope this document will help friends in need; interested friends can
- 2024-01-28 0 648