2023-09-14 v. 2.9.3: added "1360. Number of Days Between Two Dates"

Author: fartem

README.md

@@ -239,3 +239,4 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
 | 1346. Check If N and Its Double Exist                      | [Link](https://leetcode.com/problems/check-if-n-and-its-double-exist/)                      | [Link](./lib/easy/1346_check_if_n_and_its_double_exist.rb)                      |
 | 1351. Count Negative Numbers in a Sorted Matrix            | [Link](https://leetcode.com/problems/count-negative-numbers-in-a-sorted-matrix/)            | [Link](./lib/easy/1351_count_negative_numbers_in_a_sorted_matrix.rb)            |
 | 1356. Sort Integers by The Number of 1 Bits                | [Link](https://leetcode.com/problems/sort-integers-by-the-number-of-1-bits/)                | [Link](./lib/easy/1356_sort_integers_by_the_number_of_1_bits.rb)                |
+| 1360. Number of Days Between Two Dates                     | [Link](https://leetcode.com/problems/number-of-days-between-two-dates/)                     | [Link](./lib/easy/1360_number_of_days_between_two_dates.rb)                     |

leetcode-ruby.gemspec

@@ -5,7 +5,7 @@ require 'English'
 ::Gem::Specification.new do |s|
   s.required_ruby_version = '>= 3.0'
   s.name = 'leetcode-ruby'
-  s.version = '2.9.2'
+  s.version = '2.9.3'
   s.license = 'MIT'
   s.files = ::Dir['lib/**/*.rb'] + %w[bin/leetcode-ruby README.md LICENSE]
   s.executable = 'leetcode-ruby'

lib/easy/1360_number_of_days_between_two_dates.rb

@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+
+# https://leetcode.com/problems/number-of-days-between-two-dates/
+# @param {String} date1
+# @param {String} date2
+# @return {Integer}
+def days_between_dates(date1, date2)
+  (days(date1) - days(date2)).abs
+end
+
+# @param {String} date
+# @return {Integer}
+def days(date)
+  y = date[0...4].to_i
+  m = date[5...7].to_i
+  d = date[8...10].to_i
+  months = [0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
+  result = 0
+  (1971...y).each { |i| result += is_leap(i) ? 366 : 365 }
+
+  result += 1 if is_leap(y) && m > 2
+
+  (1...m).each { |i| result += months[i] }
+
+  result + d
+end
+
+# @param {Integer} year
+# @return {Boolean}
+def is_leap(year)
+  ((year % 4).zero? && (year % 100).positive?) || (year % 400).zero?
+end

test/easy/test_1360_number_of_days_between_two_dates.rb

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+require_relative '../test_helper'
+require_relative '../../lib/easy/1360_number_of_days_between_two_dates'
+require 'minitest/autorun'
+
+class NumberOfDaysBetweenTwoDatesTest < ::Minitest::Test
+  def test_default
+    assert_equal(1, days_between_dates('2019-06-29', '2019-06-30'))
+    assert_equal(15, days_between_dates('2020-01-15', '2019-12-31'))
+  end
+end