Snobol4【1】 语言实战：日期时间格式统一【2】实战
日期时间格式统一是数据处理和交换中常见的问题。不同的系统【3】和应用可能使用不同的日期时间格式，这给数据集成【4】和交换带来了挑战。Snobol4 是一种古老的编程语言，以其简洁和强大的文本处理能力【5】而闻名。本文将探讨如何使用 Snobol4 语言实现日期时间格式的统一，以解决实际工作中的日期时间格式统一问题。
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。它是一种解释型语言【6】，以其强大的文本处理能力而著称。Snobol4 的语法简洁，易于理解，特别适合于文本处理任务。
日期时间格式统一问题
在处理日期时间数据时，我们常常会遇到以下问题：
1. 不同的系统使用不同的日期时间格式。
2. 日期时间格式可能包含多种表示方法【7】，如年月日、月日年等。
3. 日期时间格式可能包含多种分隔符【8】，如“-”、“/”、“.”等。
4. 日期时间格式可能包含多种时区表示【9】。
Snobol4 实现日期时间格式统一
以下是一个使用 Snobol4 语言实现日期时间格式统一的示例代码：
```snobol
input date
output unified_date
date = date " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " " / " 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