使用正则表达式扫描子字符串并忽略区分大小写

Question

我有一个很长的文本，我正在尝试扫描它以便在其中找到几个单词。 我正在寻找一个可以解决问题但忽略大小写敏感性的函数。

非常重要：我无法将字符串更改为小写或大写！这是一个帖子应用，如果我要更改它，回滚会很棘手。

例子：

str = "According to a new report from TechCrunch, Apple has acquired the photo technology startup SnappyLabs. The company is a one-man development team known for creating the SnappyCam app."

word = "the"

str.scan(/word/) # need to find "the" and "The"

更新

如何获取单词第一次出现的字符串索引？

如果其他人需要它，请使用str =~ (/word/i)（感谢@steenslag）

Answer 1

str = "According to a new report from TechCrunch, Apple has acquired the photo technology startup SnappyLabs. The company is a one-man development team known for creating the SnappyCam app."

word = "the"

str.scan(/#{word}/i) # need to find "the" and "The"

正则表达式后面的“i”使其忽略大小写。