mirror of
https://gitlab.com/mfocko/LeetCode.git
synced 2024-11-14 01:49:41 +01:00
27 lines
616 B
Ruby
27 lines
616 B
Ruby
# @param {Integer[]} nums
|
|
# @return {Boolean}
|
|
def contains_duplicate(nums)
|
|
encountered = Set.new
|
|
|
|
nums.each { |x|
|
|
if encountered.add?(x) == nil then
|
|
return true
|
|
end
|
|
}
|
|
|
|
return false
|
|
end
|
|
|
|
RSpec.describe "contains_duplicate" do
|
|
it "nums = [1,2,3,1] contains" do
|
|
expect(contains_duplicate([1,2,3,1])).to be true
|
|
end
|
|
|
|
it "nums = [1,2,3,4] doesn't contain" do
|
|
expect(contains_duplicate([1,2,3,4])).to be false
|
|
end
|
|
|
|
it "nums = [1,1,1,3,3,4,3,2,4,2] contains" do
|
|
expect(contains_duplicate([1,1,1,3,3,4,3,2,4,2])).to be true
|
|
end
|
|
end
|