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Course Introduction：Summary research on commonly used classes in joomla2.5, summary of joomla2.5 classes. Summary study of commonly used classes in joomla2.5, summary of joomla2.5 classes. The previous article only studied the JImage class. Today, we will continue with other commonly used joomla built-in classes. I personally wrote it from a common perspective. If PHP itself functions

2016-07-06 comment 0  1190

Course Introduction：Summary research on commonly used classes in joomla2.5, summary of joomla2.5 classes. Summary study of commonly used classes in joomla2.5, summary of joomla2.5 classes. The previous article only studied the JImage class. Today, we will continue with other commonly used joomla built-in classes. I personally wrote it from a common perspective. If PHP itself functions

2016-07-12 comment 0  874

Course Introduction：Java uses wrapper classes because basic data types cannot directly participate in object-oriented operations, and object forms are often required in actual needs; 1. Collection classes can only store objects, such as Lists use automatic boxing to store numerical values; 2. Generics do not support basic types, and packaging classes must be used as type parameters; 3. Packaging classes can represent null values ??to distinguish unset or missing data; 4. Packaging classes provide practical methods such as string conversion to facilitate data parsing and processing, so in scenarios where these characteristics are needed, packaging classes are indispensable.

2025-06-28 comment 0  408

Course Introduction：Python image processing: Pillow library implements automatic line-wrapping text annotation. With its rich open source libraries, Python has become a leading programming language in the field of image processing. Pillow is one of the commonly used image processing libraries. It is simple, easy to use and has complete documentation. It is often used for operations such as image scaling, cropping, brightness adjustment and annotation. However, Pillow has a problem with text annotation: when the text exceeds the width of the text box, it will not wrap automatically. The Pillow library itself does not provide this function, and we need to write the logic implementation ourselves. This tutorial will demonstrate how to use the Pillow library to add a word-wrap text box in Python to achieve correct image text annotation. The final effect is as follows: The picture above is

2025-01-14 comment 0  1045

Course Introduction：Using OpenCV and C for image processing is not complicated. You can quickly get started by mastering the basic process and common functions. 1. Installation and environment configuration: Ensure that OpenCV is installed correctly, Linux can be installed with package manager, Windows can use vcpkg or manually configure the path, and test whether it is normal through a simple program; 2. Basic operations of images: use cv::imread() to read, cv::imshow() to display, cv::imwrite() to save images, and pay attention to the necessity of path judgment and waitKey(); 3. Common image processing operations: including grayscale, Gaussian blur, Canny edge detection and threshold processing, which are usually used in the preprocessing stage; 4. Custom convolution kernel

2025-07-09 comment 0  583

Course Elementary  13744

Course Introduction：Scala Tutorial Scala is a multi-paradigm programming language, designed to integrate various features of object-oriented programming and functional programming.

Course Elementary  82260

Course Introduction："CSS Online Manual" is the official CSS online reference manual. This CSS online development manual contains various CSS properties, definitions, usage methods, example operations, etc. It is an indispensable online query manual for WEB programming learners and developers! CSS: Cascading Style Sheets (English full name: Cascading Style Sheets) is an application used to express HTML (Standard Universal Markup Language).

Course Elementary  13130

Course Introduction：SVG is a markup language for vector graphics in HTML5. It maintains powerful drawing capabilities and at the same time has a very high-end interface to operate graphics by directly operating Dom nodes. This "SVG Tutorial" is intended to allow students to master the SVG language and some of its corresponding APIs, combined with the knowledge of 2D drawing, so that students can render and control complex graphics on the page.

Course Elementary  24578

Course Introduction：In the "AngularJS Chinese Reference Manual", AngularJS extends HTML with new attributes and expressions. AngularJS can build a single page application (SPAs: Single Page Applications). AngularJS is very easy to learn.

Course Elementary  27436

Course Introduction：Go is a new language, a concurrent, garbage-collected, fast-compiled language. It can compile a large Go program in a few seconds on a single computer. Go provides a model for software construction that makes dependency analysis easier and avoids most C-style include files and library headers. Go is a statically typed language, and its type system has no hierarchy. Therefore users do not need to spend time defining relationships between types, which feels more lightweight than typical object-oriented languages. Go is a completely garbage-collected language and provides basic support for concurrent execution and communication. By its design, Go is intended to provide a method for constructing system software on multi-core machines.