0001-two-sum.rb

# frozen_string_literal: true

# 1. Two Sum
# https://leetcode.com/problems/two-sum

# @param {Integer[]} nums
# @param {Integer} target
# @return {Integer[]}
deftwo_sum(nums,target)
h={}
(0..nums.size - 1).eachdo |i|
complement=target - nums[i]

return[i,h[complement]]ifh.key?(complement)

h[nums[i]]=i
end
end

# **************** #
# TEST #
# **************** #

require"test/unit"
classTest_two_sum < Test::Unit::TestCase
deftest_
assert_equal[0,1].sort,two_sum([2,7,11,15],9).sort
assert_equal[1,2].sort,two_sum([3,2,4],6).sort
assert_equal[0,1].sort,two_sum([3,3],6).sort
end
end