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Learning (aka. playing with) Clojure

first heard about it early 2012 (I think)
dipped my feet in a few times since then
came across (i.e. read or saw things they did) a few interesting people using/writing Clojure in interesting way (fogus, Rich Hickey, Chris Granger)
now reading 'The Joy of Clojure' (and enjoying it)

Tools

mostly LightTable
previously Vim with the VimClojure plugin, but not right now (LightTable 'feels' more interactive to me and what I miss most from Vim (keybindings) will be in LT soonish, I also think that something like LT has more potential to be extensible and has a much saner extension language)
the clj repl

the giggles
- homoiconic
- has macros
- good feature inheritance (supposedly, not as in OO)
- lots of cool projects (datomic, matchure, ring, lighttable, typed-clojure)
the quibbles
- the dynamic type-system continues to bite me could be my fault, but I often jump right in without reading the whole documentation and have spend too much time tracking weird errors down that were all fixed by changing one place in the code
- learning new libraries without sufficient docs/tutorials (e.g. what are the arguments to this function, what does this map mean; maybe clojure wants me to think differently)
- the jvm overhead is bad for my little computer (too slow, too much memory consumed)

Some examples for the quibbles.

(if (= something something-undefined) true-expr false-expr) not throwing an exeption for something-undefined being not defined