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February 18, 2015 14:23
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require 'minitest/autorun' | |
require 'minitest/pride' | |
# Write a method which accepts an array as the first paramater and a number | |
# as the second parameter. Return true if two of the numbers in the array sum | |
# to the second parameter. | |
# WRITE YOUR CODE HERE. Name your method `complements?`. | |
def complements?(array, sum) | |
if array == nil || array.length < 2 | |
return false | |
end | |
temp = 0 | |
array.each do |a| | |
if sum - a == array.any? | |
return true | |
end | |
temp += a | |
end | |
if temp == sum | |
return true | |
else | |
return false | |
end | |
end | |
class DoubleLoopChallenge < MiniTest::Test | |
def test_exact_match_arrays | |
assert complements?([1, 0], 1) | |
assert complements?([-4, 4], 0) | |
assert complements?([25, 43], 68) | |
refute complements?([25, 25], 25) | |
refute complements?([1, 3], 25) | |
refute complements?([-25, 25], 25) | |
end | |
def test_too_small_arrays | |
refute complements?([25], 25) | |
refute complements?([], 25) | |
refute complements?(nil, 25) | |
end | |
def test_bigger_arrays | |
assert complements?([1, 0, 2, 17, 8], 1) | |
assert complements?([24, 78, 0, -4, 4], 0) | |
assert complements?([1, 25, 3, 8, -8, 43], 68) | |
refute complements?([18, 25, 43, 25, 98, 10], 25) | |
refute complements?([12, 2, 3, 9, 11], 25) | |
refute complements?([25, -25, 25, -25, 25], 25) | |
end | |
def test_double_counting | |
refute complements?([12, 0], 24) | |
refute complements?([50, -10], 100) | |
end | |
end |
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