I liked this - a quick summary of what Redis can offer, better than skimming a lot of "NoSQL is better" articles. Would be interesting if the tutorial mentioned some of the scenarios why Redis is better than standard SQL at the end though. I'm left thinking - interesting, but what's the advantage over what I know already. All the sets, ordered sets, and so on can be done fairly straightforwardly in SQL. Examples of performance guarantees / benefits for example.
set fu 1
incr fu
The Try-ruby tutorial asks you to type ruby statements to get to the next step.
==========
We can use the command SET to store the value "fido" at key "server:name":
SET server:name "fido"
==========
%
The blue window above is a Ruby prompt. Type a line of Ruby code, hit Enter and watch it run!
For example, try typing some math. Like: 2 + 6