The Big Programming Thread - Page 693

total = sum(weights)
roll = random.random() * total
i = 0
accum = weights[0]
while accum < roll:
    i += 1
    accum += weights[i]
// Here, i will be the index of the randomly selected weight, and you can do whatever you want based on that.

i=randint()
if (i<0.1):
    blah
elseif (i<0.2):
    blah2
etc.

//PSEUDOCODE

weightMap = {
  0.1: function() { do_stuff(); },
  0.2: function() { do_other_stuff(); },
  1.0: function() { do_last_stuff(); }
};

i = random();
foreach (weight in keys weightMap)
{
  if (i <= weight) 
  {
    weightMap[weight]();
    break;
  }
}

class Hash
  def total_weight
    @total_weight ||= values.reduce :+
  end
  
  def sample
    sum = 0
    keys.each do |key|
      probability = self[key]
      if rand(total_weight) >= total_weight - (probability + sum)
        return key
      else
        sum += probability
      end
    end
  end
end

random_stuff = {"A" => 1, "B" => 5, "C" => 59, "D" => 120}

picks = { "A" => 0, "B" => 0, "C" => 0, "D" => 0}

10000.times do
  picks[random_stuff.sample] += 1
end

p picks # Sample output: {"A"=>57, "B"=>333, "C"=>3351, "D"=>6259}

import os, shutil
fileList=os.listdir()
for file in fileList:
    if file.contains("[i]"):
        newLocation=file.replace("[i]","")
        shutil.move(os.getcwd()+file, newLocation)#Make sure you run this script in the folder you want to change