honza

(defn update-keys [m ks f]
  (let [g (fn [c k]
            (update-in c [k] f))]
    (reduce g m ks)))

(update-keys {:a 1 :b 2} [:a :b] inc)

;; => {:a 2 :b 3}

honza

-- This is a Haskell implementation of aphyr's
-- "Clojure from the ground up - modeling"
--
-- http://aphyr.com/posts/312-clojure-from-the-ground-up-modeling
--
-- Compile this with:
-- 
--   $ ghc -O Rocket.hs

import GHC.Exts

honza

class Functor f where
    fmap :: (a -> b) -> f a -> f b

class (Functor f) => Applicative f where
    pure :: a -> f a
    (<*>) :: f (a -> b) -> f a -> f b

(<$>) :: (Functor f) => (a -> b) -> f a -> f b

class Monad m where

honza

Keybase proof

I hereby claim:

• I am honza on github.
• I am honza (https://keybase.io/honza) on keybase.
• I have a public key whose fingerprint is 70E0 3E0A A2E5 40EA A2FB 4422 67C0 AD96 97D5 AB41

To claim this, I am signing this object:

honza

function cabal_prompt
    if [ -e "cabal.sandbox.config" ]
        printf '(cabal sandbox)'
    end
end

honza

;; If you name your impure functions with a name ending in "!",
;; you can use this handy macro to check if a form uses any impure functions.

(declare find-impure)

(defn ends-in-bang? [s]
  (= \! (last (str s))))

(defn impure? [e]
  (cond

honza

(def app {})

(defmacro fnj [args & body]
  (if (empty? args)
    `(fn  [] ~@body)
    `[~@(map name args) (fn ~args ~@body)]))

(defmacro def-controller [module n args & body]
  `(.controller ~module ~(name n) (fnj ~args ~@body)))

honza

dactyl/pentadactyl/../common/make_jar.sh: line 47: unexpected EOF while looking for matching `''
make: *** [chrome/] Error 2

honza

// Given

var content = {
  id: 1,
  name: 'Honza'
};

function renderTemplate(content) {
  return 'Hello, ' + content.name;
}

honza

Developing in Clojure seems to require tons of RAM. I'm currently working on a small HTTP service: 200 LOC, minimal dependencies. I'm using lein ring server-headless to run a development server, and I'm using Emacs and the CIDER repl. This spins up 4 java processes on my machine, 2 for the server and 2 for CIDER.

That's almost 3GB of RAM. If you're also running a VM in virtualbox or VMware, your computer is gonna have a bad time.

VMware Fusion is using only 200MB of RAM. No idea how that's possible.