Created
April 18, 2016 20:16
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module Flattener | |
def flatten element, result=[] | |
if element.is_a? Array | |
element.each do |e| | |
flatten e, result | |
end | |
else | |
result << element | |
end | |
result | |
end | |
end | |
require "minitest/autorun" | |
class TestFlattener < Minitest::Test | |
include Flattener | |
def test_empty | |
assert_equal [], flatten([]) | |
end | |
def test_single | |
assert_equal [1], flatten([1]) | |
end | |
def test_multiple | |
assert_equal [3,4,1,2], flatten([3,4,1,2]) | |
end | |
def test_nested | |
assert_equal [3,4,1,2], flatten([[3,4,[1]],2]) | |
assert_equal [3,4,1,2], flatten([3,4,[[1],2]]) | |
assert_equal [1,4,1,2,4], flatten([1,4,[[1],2],4]) | |
end | |
end |
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