From: Mike Stephens <rubfor@...>
Date: 2010-12-02T03:30:35+09:00
Subject: Re: Help sorting an array

If you've ever read "Real Programmers don't use Pascal" (see
http://www.codeproject.com/KB/scrapbook/realprog.aspx ) you'll know that
"Determined Real Programemrs can write Fortran programs in any language"
Just because you're a Ruby programmer you don't have to use all that OO
stuff.

This algorithm picks out the first label and moves it into a new space
on the left, and then moves the second label to where the first was and
so on. Lastly it removes the vacated slot on the right:


def initialise_globals
  $m1 = "JANUARY"
  $m2 = "FEBRUARY"
  $m3 = "MARCH"

  $m1_index = 0
  $m2_index = 0
  $m3_index = 0
end

def get_array
  $input_array = ["#<Event:0x4d4cf78>", "#<Event:0x4d4d470>", "MARCH",
"#<Event:0x4d4dc08>",
"#<Event:0x4d4e100>", "FEBRUARY", "#<Event:0x4d4e898>","JANUARY"]
  puts " #{$input_array}"
end

def shuffle_all_right
  #insert m3 while we’re at it.
  $input_array.unshift " "
end

def locate_months
  $m1_index = $input_array.index $m1
  $m2_index = $input_array.index $m2
  $m3_index = $input_array.index $m3
end


def bring_months_to_left
  $input_array[0] = $input_array[$m3_index]
  $input_array[$m3_index] = $input_array[$m2_index]
  $input_array[$m2_index] = $input_array[$m1_index]
end

def delete_right_slot
  $input_array.pop
end

def main_program
  initialise_globals
  get_array
  shuffle_all_right
  locate_months
  bring_months_to_left
  delete_right_slot
end

main_program

puts $input_array

Actually I cheated there as I enclosed the #strings in quotes. Anyone
know how to deal with #s?

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