sl4m

Programming Achievements: How to Level Up as a Developer

This gist is part of a blog post. Check it out at:

http://jasonrudolph.com/blog/2011/08/09/programming-achievements-how-to-level-up-as-a-developer

sl4m

       Object
         Behavior
           ClassDescription
             Class
             Metaclass
         BlockClosure
         Boolean
           False
           True
         Browser

slagyr

(defn neighbors-of [cell]
  (set (for [dx [-1 0 1] dy [-1 0 1] :when (not (= [dx dy] [0 0]))]
    [(+ dx (first cell)) (+ dy (second cell))])))

(defn alive? [[cell freqs] world]
  (or (and (= 2 freqs) (contains? world cell)) (= 3 freqs)))

(defn tick [world]
  (let [frequencies (frequencies (reduce #(concat %1 (neighbors-of %2)) [] world))]
    (set (keys (filter #(alive? % world) frequencies)))))

sl4m

MySQL commands (from http://www.pantz.org/software/mysql/mysqlcommands.html)

Create a database on the sql server.
mysql> create database [databasename];

List all databases on the sql server.
mysql> show databases;

Switch to a database.
mysql> use [db name];

sl4m

"Chris Rathman / [email protected]
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