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React极简教程: Hello,World!React简史React安装Hello,World

A programming paradigm is a fundamental style of computer programming. There are four main paradigms: imperative, declarative, functional (which is considered a subset of the declarative paradigm) and object-oriented. Declarative programming : is a programming paradigm that expresses the logic of a computation(What do) without describing its control flow(How do). Some well-known examples of declarative domain specific languages (DSLs) include CSS, regular expressions, and a subset of SQL (SELECT queries, for example) Many markup languages such as HTML, MXML, XAML, XSLT… are often declarative. The declarative programming try to blur the distinction between a program as a set of instructions and a program as an assertion about the desired answer. Imperative programming : is a programming paradigm that describes computation in terms of statements that change a program state. The declarative programs can be dually viewed as programming commands or mathematical assertions. Functional programming : is a programming paradigm that treats computation as the evaluation of mathematical functions and avoids state and mutable data. It emphasizes the application of functions, in contrast to the imperative programming style, which emphasizes changes in state. In a pure functional language, such as Haskell, all functions are without side effects, and state changes are only represented as functions that transform the state. ( 出处:维基百科)

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springboot第35集:微服务与flutter安卓App开发

在Linux或Unix系统中,您可以使用cat命令或tail命令来查看日志文件的内容。以下是常用的命令示例: 使用cat命令查看完整的日志文件内容: cat /path/to/your/logfile.log 使用tail命令查看日志文件的末尾部分(默认显示最后10行): tail /path/to/your/logfile.log 您也可以使用-n参数指定显示的行数,例如显示最后20行: tail -n 20 /path/to/your/logfile.log 如果日志文件比较大,可以使用less命令进行分页查看: less /path/to/your/logfile.log 使用space键向下翻页,使用b键向上翻页,使用q键退出查看。 如果您希望在实时监视日志文件的更新,可以使用tail命令的-f参数: tail -f /path/to/your/logfile.log 这将实时显示日志文件的末尾部分,并持续监视文件的更新。

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JavaDoc的生成规则—ShinePans

使用方法: javadoc [options] [packagenames] [sourcefiles] [@files] -overview <file> 从 HTML 文件读取概览文档 -public 仅显示 public 类和成员 -protected 显示 protected/public 类和成员 (默认值) -package 显示 package/protected/public 类和成员 -private 显示全部类和成员 -help 显示命令行选项并退出 -doclet <class> 通过替代 doclet 生成输出 -docletpath <path> 指定查找 doclet 类文件的位置 -sourcepath <pathlist> 指定查找源文件的位置 -classpath <pathlist> 指定查找用户类文件的位置 -exclude <pkglist> 指定要排除的程序包列表 -subpackages <subpkglist> 指定要递归载入的子程序包 -breakiterator 计算带有 BreakIterator 的第一个语句 -bootclasspath <pathlist> 覆盖由引导类载入器所载入的 类文件的位置 -source <release> 提供与指定发行版的源兼容性 -extdirs <dirlist> 覆盖所安装扩展的位置 -verbose 输出有关 Javadoc 正在运行的操作的信息 -locale <name> 要使用的区域设置, 比如 en_US 或 en_US_WIN -encoding <name> 源文件编码名称 -quiet 不显示状态消息 -J<flag> 直接将 <flag> 传递到执行时系统 -X 输出非标准选项的提要

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