You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
23 lines
430 B
Ruby
23 lines
430 B
Ruby
# Shellsort algorithm,
|
|
# see examples in test/shell_sort_test.rb
|
|
module Shell
|
|
def self.sort(array)
|
|
gap = 1
|
|
gap = 3 * gap + 1 while gap < array.size / 3
|
|
|
|
while gap > 0
|
|
gap.upto(array.size - 1) do |i|
|
|
j = i
|
|
while j > 0 && array[j] < array[j - gap]
|
|
array[j], array[j - gap] = array[j - gap], array[j]
|
|
j -= gap
|
|
end
|
|
end
|
|
|
|
gap /= 3
|
|
end
|
|
|
|
array
|
|
end
|
|
end
|