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Mac Network Commands Cheat Sheet

After writing up the presentation for MacSysAdmin in Sweden, I decided to go ahead and throw these into a quick cheat sheet for anyone who’d like to have them all in one place. Good luck out there, and stay salty.

Get an ip address for en0:

ipconfig getifaddr en0

Same thing, but setting and echoing a variable:

ilazarte

# https://code.google.com/p/android/issues/detail?id=156708
# http://stackoverflow.com/questions/16736856/what-should-be-in-my-gitignore-for-an-android-studio-project

*.iml
.gradle
/local.properties
/.idea/workspace.xml
/.idea/libraries
.DS_Store
/build

ilazarte

(defn partition-every
  "adapted from clojure core version of partition-by
   partition a collection every time a predicate returns true
   => (partition-every keyword? [:a 1 2 3 :b :c 4 5 6 7 :d :e])
   ((:a 1 2 3) (:b) (:c 4 5 6 7) (:d) (:e))"
  [pred coll]
  (lazy-seq
    (when-let [s (seq coll)]
      (let [fst (first s)
            run (cons fst (take-while (complement pred) (next s)))]

ilazarte

/**
 * Cycle detection function
 * Outputs count and grouped cycles with a from key path and to key path.
 * The executing browser should have console.group and .groupEnd functions.
 * 
 * Based on:
 * http://stackoverflow.com/questions/14962018/detecting-and-fixing-circular-references-in-javascript/14962496#14962496
 * 
 * @param  {Object} obj Any js object
 * @return {void}     

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;=> (let-map [i (range 5)] (inc i))
;(1 2 3 4 5)
;=> (def books '({:name "The Great Gatsby" :href "urlA"}
;                {:name "The Unbearable Lightness of Being" :href "urlB"}))
;=> (let-map [b books] [:li [:a {:href (:href b)} (:name b)]])
;([:li [:a {:href "urlA"} "The Great Gatsby"]] [:li [:a {:href "urlB"} "The Unbearable Lightness of Being"]])

(defmacro let-map
  [decl form]
  "Usage: (let-map [i (range 5)] (inc i))"