0905-sort-array-by-parity.rb

# frozen_string_literal: true

# 905. Sort Array By Parity
# Easy
# https://leetcode.com/problems/sort-array-by-parity

=begin
Given an integer array nums, move all the even integers at the beginning of the array followed by all the odd integers.
Return any array that satisfies this condition.

Example 1:
Input: nums = [3,1,2,4]
Output: [2,4,3,1]
Explanation: The outputs [4,2,3,1], [2,4,1,3], and [4,2,1,3] would also be accepted.

Example 2:
Input: nums = [0]
Output: [0]

Constraints:
1 <= nums.length <= 5000
0 <= nums[i] <= 5000
=end

# @param {Integer[]} nums
# @return {Integer[]}
defsort_array_by_parity(nums)
nums.partition(&:even?).sum([])
end

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

require"test/unit"
classTest_length_of_longest_substring < Test::Unit::TestCase
deftest_
assert_equal[2,4,3,1].sort,sort_array_by_parity([3,1,2,4]).sort
assert_equal[0].sort,sort_array_by_parity([0])
end
end