Ruby 如何共享在块内设置的变量

我有一个方法可以执行以下操作（使用openuri）

---

我想知道在

open

的IO操作完成后，如何访问

rendered_html

。

在块外初始化变量

def convert_html(remote_url)
  rendered_html = nil
  open(remote_url) do |file|
    # After some file manipulation, I do an assignment
    rendered_html = find_html_to_render
  end
  ...
end

---

初始化块外部的变量

def convert_html(remote_url)
  rendered_html = nil
  open(remote_url) do |file|
    # After some file manipulation, I do an assignment
    rendered_html = find_html_to_render
  end
  ...
end

---

初始化块外部的变量

def convert_html(remote_url)
  rendered_html = nil
  open(remote_url) do |file|
    # After some file manipulation, I do an assignment
    rendered_html = find_html_to_render
  end
  ...
end

---

初始化块外部的变量

def convert_html(remote_url)
  rendered_html = nil
  open(remote_url) do |file|
    # After some file manipulation, I do an assignment
    rendered_html = find_html_to_render
  end
  ...
end