From: Derek Cannon <novellterminator@...>
Date: 2010-04-22T22:39:26+09:00
Subject: Best way to write this method?

Could my code below be more Ruby-esque or simpler (using Ruby methods I
might not know)?

def range_overlaps?(a, b)
  array = a.to_a & b.to_a
  !array.empty?
end

def overlaps?(a, b)
  # Check if days overlap; if not, no reason to continue method
  if not range_overlaps?(a.keys, b.keys)
    return false
  else
    a.each_key { |i|
      b.each_key { |j|
        # Check each element of each array to see if any ranges overlap
        if range_overlaps?(a[i], b[j])
          return true
        end
      }
    }
  end
  return false
end

---- Examples of Usage ----
def get_time(s)
  temp = s.split("-")
  Time.parse(temp[0], Time.now)..Time.parse(temp[1], Time.now)
end

a = {:m => [get_time("9:00am-10:00am"), get_time("10:15am-11:45am")], :w
=> [get_time("9:00am-10:00am")]}
b = {:m => [get_time("10:30am-12:00am")], :w =>
[get_time("10:30am-12:00am")]}
c = {:m => [get_time("9:00am-10:00am")], :w =>
[get_time("9:00am-10:00am")], :f => [get_time("9:00am-10:00am")]}
d = {:t => [get_time("9:00am-10:00am")], :r =>
[get_time("9:00am-10:00am")]}

puts overlaps?(a,b) # => false
puts overlaps?(a,c) # => true
puts overlaps?(a,d) # => false
-- 
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