用文字和網址替換降價鏈接

Question

我的目標是將Markdown轉換為文本。 我通過使用Redcarpet將markdown解析為HTML，然后使用#strip_tags來完成此操作。 我的問題是鏈接，此方法僅保留鏈接的文本，而不保留鏈接本身。

例如：使用#strip_tags后，我需要保留href網址

# current
<a href="http://www.google.com">google</a> => google
# desired
<a href="http://www.google.com">google</a> => http://www.google.com google

我認為最好的方法是使用正則表達式，有人可以幫助實現嗎？

我的目標是：

def contents_md

# instantiates Redcarpet
    @markdown ||= begin
        options = [autolink: true, fenced_code_blocks: true,     no_intra_emphasis: true, hard_wrap: true, filter_html: true, gh_blockcode: true]
        renderer = Redcarpet::Render::HTML.new(render_options = {})
        Redcarpet::Markdown.new(renderer, *options)
    end

# I need to run contents through a regex before passing to renderer that will turn something like this:
# [text1](https://www.stackoverflow.com) and [text2](https://www.google.com)
# into:
# text1 https://www.stackoverflow.com and text2 https://www.google.com


# then ill pass the result here, which will preserve my links that would be held in <a></a> instead of losing them 
 @markdown.render(contents)
end

# this will then be ran like:
<%= strip_tags(value.contents_md) %>

Answer 1

您可以將gsub與這樣的正則表達式一起使用：

text = "[text1](https://www.stackoverflow.com) and [text2](https://www.google.com)"

text.gsub(/\[(.*?)\]\((.*?)\)/, "#{$1} #{$2}")
#=> "text2 https://www.google.com and text2 https://www.google.com"