Snobol4【1】 语言在 Markdown【2】 标题数据清洗【3】中的应用
Markdown 是一种轻量级标记语言，常用于格式化文本。在处理文档时，Markdown 标题的识别和清洗是数据处理的重要步骤。Snobol4，作为一种古老的编程语言，以其简洁的语法和强大的文本处理能力而著称。本文将探讨如何使用 Snobol4 语言进行 Markdown 标题的数据清洗，并展示其在该领域的应用。
Snobol4 简介
Snobol4 是一种高级编程语言，由David J. Farber、Ralph E. Griswold 和 Ivan P. Polonsky 在1962年设计。它以其强大的字符串处理【4】能力而闻名，特别适合于文本处理任务。Snobol4 的语法简洁，易于理解，且具有丰富的文本处理函数。
Markdown 标题格式【5】
Markdown 标题通常使用以下格式：
- `` 表示一级标题
- `` 表示二级标题
- `` 表示三级标题
- 以此类推，每增加一个 ``，标题级别增加一级
数据清洗任务
在 Markdown 文档中，数据清洗的任务主要包括：
1. 识别并提取所有标题
2. 格式化标题，使其符合特定的格式要求
3. 清除标题中的多余空格和特殊字符【6】
Snobol4 代码实现
以下是一个使用 Snobol4 语言进行 Markdown 标题数据清洗的示例代码：
```snobol
:read line
title
1 = line
1 = title
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 = 0
1 =
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