Eval inline ruby inside a markdown document -

I need to call some helpful calls from Markdown view. Is it some kind of good practice and generally popular Ruby based Supported on the Markdown Parser?

No, it is not. Markdown is a standardized, text-focused, cross-language format, and most Markdown Parsers provide support for standard syntax.

However, platforms that require advanced features, such as wiki and, combine custom attributes, are general tags, tags for creating page TOC on the basis of document structure.

The AFAIK, not the BlueCloth nor the RDiscount extension provides built-in support, before you can pass the markdown text to the processor, you have to manually code them.