j-po

(defn scary-people
  "Go `n` levels deep into the \"Normal people scare me\" shirt"
  [n]
  (loop [n n
         ret "Normal people scare me"
         quotes (if (odd? n) \" \')]
    (if (zero? n)
      ret
      (recur (dec n)
             (str "Normal people wearing " quotes ret quotes " shirts scare me")

j-po

# `pushd` and `popd`-style commands for git branches (in the place of directories)
# USAGE: `pushb <branch>; SOME_WORK; popb`
GITSTACK=() # stack of branches–just an array that we add to and access from the tail
GITSTASHCK=() # stack of stashes

function pushb {
  GITSTACK+=`git symbolic-ref --short HEAD`
  GITSTASHCK+=`git stash create`
  git reset --hard # `git stash create` doesn't do this the way `git stash` normally does
  git checkout $1

j-po

# From Udacity's Software Testing class (problem set 3, problem 1)
#
# SPECIFICATION:
#
# check_sudoku() determines whether its argument is a valid Sudoku
# grid. It can handle grids that are completely filled in, and also
# grids that hold some empty cells where the player has not yet
# written numbers.
#
# First, your code must do some sanity checking to make sure that its