Snobol4 语言 实战 Markdown 列表项转 HTML 列表实战

Snobol4阿木 发布于 11 天前 4 次阅读

Snobol4 语言实战：Markdown 列表项转 HTML 列表

Snobol4 是一种古老的编程语言，最初在1962年由David J. Farber、Peter J. Deutsch 和 Thomas E. Kurtz 设计。它以其独特的文本处理能力而闻名，特别适合于模式匹配和字符串操作。本文将探讨如何使用 Snobol4 语言将 Markdown 列表项转换为 HTML 列表，通过一个实际的编程项目来展示 Snobol4 的强大功能。

Markdown 与 HTML 列表简介

Markdown 是一种轻量级标记语言，常用于格式化文本。Markdown 列表通常以 `-`、`` 或 `+` 开头，后面跟着空格和列表项内容。例如：

markdown
- 项目一
- 项目二
- 项目三

HTML 列表则是一种用于网页的标记语言，可以创建有序列表（``）和无序列表（``）。例如：

html

项目一

项目二

项目三

Snobol4 语言基础

在开始编写代码之前，我们需要了解一些 Snobol4 语言的基础知识。Snobol4 使用模式匹配和规则来处理文本，下面是一些关键概念：

- 模式：用于匹配文本的模式，类似于正则表达式。
- 规则：用于定义如何处理匹配到的文本。
- 变量：用于存储数据的容器。

实战：Markdown 列表项转 HTML 列表

1. 定义输入和输出

我们需要定义输入和输出格式。在这个例子中，输入是一个包含 Markdown 列表项的字符串，输出是一个 HTML 列表。

2. 编写 Snobol4 代码

下面是一个 Snobol4 程序，它将 Markdown 列表项转换为 HTML 列表。

```snobol
:input
input = "输入的 Markdown 列表"
output = "转换后的 HTML 列表"

:rules
% 输入处理
input = [ " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | " " | 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