Blog post scheduler

blog_post_scheduler.rb

# create a method called create_groups that, given an array of student names,
# a group size, and a number of groups, will return an array of groups of
# of students with no student in adjacent groups
def create_groups(students, group_size, num_of_groups)
  out_of_order = students.shuffle
  groups = []
  index = 0
  num_of_groups.times do
    group = []
    group_size.times do
      group << out_of_order[index]
      index = (index+=1) % students.count
    end
    groups << group
  end
  groups
end

# Another approach
def create_groups_alt(students, group_size, num_of_groups)
  # (total size needed) / (current size)
  grow_by = ((num_of_groups * group_size).to_f / students.count.to_f).ceil
  out_of_order = students.shuffle * grow_by

  groups = []
  out_of_order.each_slice(group_size) do |group|
    groups << group if groups.count < num_of_groups
  end
  groups
end