A brief explanation of what some of these are doing, or moreover, a use case for why I would want to use them would be handy.

Indeed! Will do it later! I just started this! Thanks for the feedback!

Only looked at "Fetch Data" and "Bubbling up thread errors" so far, but they were self-explanatory. I'm betting most of them are like this.

Yeah..Some of them are self-explanatory, it makes me to think that the comments/description may not be necessary. But, a simple comment it's not a problem...Let's see. =)

associative arrays could use an example illustrating when/why to use them

I was hoping for something like "static code analysis" and "make code more robust", not for "magic" and "even more magic".

You probably want http://elixir-lang.org that way ==>

$VERBOSE is mentioned for warnings. That's pretty handy.

I also like $DEBUG! =)

if $DEBUG p "var is %p" % var end

One very obscure trick in ruby is the flip-flop operator. Never used it and I probably never will. There's an open issue to get rid of it[1]. Has anyone ever had a real use case for it?

[1]: https://bugs.ruby-lang.org/issues/5400

You've never wanted a range of lines out of a file? It's a common Perl idiom.

It looks like this is not being treated as a range operator, but a flip-flop operator I've never heard of

That's the name of the operator, sure. One of the use cases of the flip-flop operator is selecting a range of lines in a file.

Thanks for sharing this. Love this format. Learned about PStore, cycle, take, fetch, securerandom, and more. May add to it.

Tweeted:

https://twitter.com/sivers/status/660875966466514944

thanks!

Awesome initiative! Already sent my PR :)

thanks, goofed

Sent a PR with a couple of fixes.

thanks, man!