Hey everyone, I've decided to start studying to get my CCNA. My books are showing up Monday and I'm really excited.

I'm going to shoot for self studying and prep for the testing. I think I can do it as I've always thrived in a more self paced learning environment (I also have no money for the classes).

I'm just wondering if anyone has any tips, supplemental material, etc they could recommend? What was hardest for you and what was easiest? What did you spend too much time studying and what didn't you spend enough time on?

I was going to ask this on Stackoverflow but it seems like reactive programming is split into per-language questions (RxJava, RxJS, RxRuby, etc.) and this is a more generic question.

How do you stream items from one Observable to multiple Observers?

I have a stream of CSV items, they're mapped to a dictionary/hash table, and then I want to:

• get the maximum value from this stream
• process the stream in a different way
• sample the stream

Can I call subscribe multiple times and then call the other operators?

-> Nim notes <-

Some background

I am learning a new programming language Nim. As many would do, I also take my own notes as I am learning it, running little example by myself, etc.

    .. but I doing that a bit differently.

• I take notes in Emacs Org mode. Org mode has a feature set called Org Babel. That allows one to document the code snippets, and also run them directly in that document, and insert their output results below them -- Notes in Org

  This also helps me document regression of the language behavior between different Nim versions of any, as the exact outputs are documented too. After each major Nim update, I press a single binding (C-v C-v b) in Emacs, and all the output blocks get recalculated.

• But not everyone uses Emacs and Org mode. So to be able to share them to a wider audience, I need to export (Org term) that to a format like HTML, PDF, or Markdown..

• Hugo is a really fast static site generator that uses Markdown as one of the primary content formats. It parses that to HTML using a Go Markdown library called Blackfriday.

• As my notes are in Org mode, and converting them to HTML via Hugo needs them to be in Blackfriday compatible Markdown (which is almost like GitHub flavored Markdown), I starting working on an Emacs Org mode package ox-hugo about a year back. Using that, this Markdown file is generated. Hugo natively supports a subset of Org, but I needed to write this package to use the full power of Org mode.

• Hugo then takes that Markdown and generates the final Nim notes page in HTML.

In the end, I have something that ties together all things of my interest: Nim, Emacs, Org mode and Hugo :)