From 99aa65d5e4e626a1dc6f0dbbdf48995a896c7c85 Mon Sep 17 00:00:00 2001
From: fartem <jaman.smlnsk@gmail.com>
Date: Thu, 20 Mar 2025 06:21:08 +0300
Subject: [PATCH] 2025-03-20 v. 9.0.5: added "2149. Rearrange Array Elements by
Sign"
---
README.md | 1 +
leetcode-ruby.gemspec | 2 +-
.../2149_rearrange_array_elements_by_sign.rb | 17 +++++++++++++
...t_2149_rearrange_array_elements_by_sign.rb | 25 +++++++++++++++++++
4 files changed, 44 insertions(+), 1 deletion(-)
create mode 100644 lib/medium/2149_rearrange_array_elements_by_sign.rb
create mode 100644 test/medium/test_2149_rearrange_array_elements_by_sign.rb
diff --git a/README.md b/README.md
index 801c3d0d..07e91274 100644
--- a/README.md
+++ b/README.md
@@ -739,6 +739,7 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
| 2125. Number of Laser Beams in a Bank | [Link](https://leetcode.com/problems/number-of-laser-beams-in-a-bank/) | [Link](./lib/medium/2125_number_of_laser_beams_in_a_bank.rb) | [Link](./test/medium/test_2125_number_of_laser_beams_in_a_bank.rb) |
| 2130. Maximum Twin Sum of a Linked List | [Link](https://leetcode.com/problems/maximum-twin-sum-of-a-linked-list/) | [Link](./lib/medium/2130_maximum_twin_sum_of_a_linked_list.rb) | [Link](./test/medium/test_2130_maximum_twin_sum_of_a_linked_list.rb) |
| 2131. Longest Palindrome by Concatenating Two Letter Words | [Link](https://leetcode.com/problems/longest-palindrome-by-concatenating-two-letter-words/) | [Link](./lib/medium/2131_longest_palindrome_by_concatenating_two_letter_words.rb) | [Link](./test/medium/test_2131_longest_palindrome_by_concatenating_two_letter_words.rb) |
+| 2149. Rearrange Array Elements by Sign | [Link](https://leetcode.com/problems/rearrange-array-elements-by-sign/) | [Link](./lib/medium/2149_rearrange_array_elements_by_sign.rb) | [Link](./test/medium/test_2149_rearrange_array_elements_by_sign.rb) |
| 2425. Bitwise XOR of All Pairings | [Link](https://leetcode.com/problems/bitwise-xor-of-all-pairings/) | [Link](./lib/medium/2425_bitwise_xor_of_all_pairings.rb) | [Link](./test/medium/test_2425_bitwise_xor_of_all_pairings.rb) |
| 2429. Minimize XOR | [Link](https://leetcode.com/problems/minimize-xor/) | [Link](./lib/medium/2429_minimize_xor.rb) | [Link](./test/medium/test_2429_minimize_xor.rb) |
| 2657. Find the Prefix Common Array of Two Arrays | [Link](https://leetcode.com/problems/find-the-prefix-common-array-of-two-arrays/) | [Link](./lib/medium/2657_find_the_prefix_common_array_of_two_arrays.rb) | [Link](./test/medium/test_2657_find_the_prefix_common_array_of_two_arrays.rb) |
diff --git a/leetcode-ruby.gemspec b/leetcode-ruby.gemspec
index e38bc7fe..42ae4fac 100644
--- a/leetcode-ruby.gemspec
+++ b/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 = '9.0.4'
+ s.version = '9.0.5'
s.license = 'MIT'
s.files = ::Dir['lib/**/*.rb'] + %w[README.md]
s.executable = 'leetcode-ruby'
diff --git a/lib/medium/2149_rearrange_array_elements_by_sign.rb b/lib/medium/2149_rearrange_array_elements_by_sign.rb
new file mode 100644
index 00000000..2fb41c66
--- /dev/null
+++ b/lib/medium/2149_rearrange_array_elements_by_sign.rb
@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+# https://leetcode.com/problems/rearrange-array-elements-by-sign/
+# @param {Integer[]} nums
+# @return {Integer[]}
+def rearrange_array(nums)
+ positives = nums.select(&:positive?)
+ negatives = nums.select(&:negative?)
+ result = []
+
+ positives.each_with_index do |p, i|
+ result << p
+ result << negatives[i]
+ end
+
+ result
+end
diff --git a/test/medium/test_2149_rearrange_array_elements_by_sign.rb b/test/medium/test_2149_rearrange_array_elements_by_sign.rb
new file mode 100644
index 00000000..18f15872
--- /dev/null
+++ b/test/medium/test_2149_rearrange_array_elements_by_sign.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+require_relative '../test_helper'
+require_relative '../../lib/medium/2149_rearrange_array_elements_by_sign'
+require 'minitest/autorun'
+
+class RearrangeArrayElementsBySignTest < ::Minitest::Test
+ def test_default_one
+ assert_equal(
+ [3, -2, 1, -5, 2, -4],
+ rearrange_array(
+ [3, 1, -2, -5, 2, -4]
+ )
+ )
+ end
+
+ def test_default_two
+ assert_equal(
+ [1, -1],
+ rearrange_array(
+ [-1, 1]
+ )
+ )
+ end
+end