module ArrayUtility

Gets the previous value in the Array. Unlike next, this method will never return Nil. Instead it will simply loop back to the end of the Array. @param single [Any] The starting value. @return [Any] The value directly before single.

# File lib/array_utility.rb, line 15
def before(single)
  self[index(single) - 1]
end

Gets the next value in the Array. @param single [Any] The starting value. @return [Any] The value directly after single. @return [Nil] If there is no value after single.

# File lib/array_utility.rb, line 7
def next(single)
  self[index(single) + 1]
end

Puts a value at the start of an array, and deletes all values greater than

the cap.

@param value [Any] The value to prepend. @param cap [Int] The maximum number of values in the array.

# File lib/array_utility.rb, line 23
def prepend_capped(value, cap)
  unshift(value)
  if size > cap
    drop(cap).each do |val|
      delete(val)
    end
  end
  self
end