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Create insertion_sort.rb (#1222)

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cy-by-side 2024-04-11 20:52:54 +08:00 committed by GitHub
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codes/ruby/chapter_sorting/insertion_sort.rb Normal file
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=begin
File: insertion_sort.rb
Created Time: 2024-04-02
Author: Cy (3739004@gmail.com), Xuan Khoa Tu Nguyen (ngxktuzkai2000@gmail.com)
=end
### 插入排序 ###
def insertion_sort(nums)
n = nums.length
# 外循环：已排序区间为 [0, i-1]
for i in 1...n
base = nums[i]
j = i - 1
# 内循环：将 base 插入到已排序区间 [0, i-1] 中的正确位置
while j >= 0 && nums[j] > base
nums[j + 1] = nums[j] # 将 nums[j] 向右移动一位
j -= 1
end
nums[j + 1] = base # 将 base 赋值到正确位置
end
end
### Driver Code ###
nums = [4, 1, 3, 1, 5, 2]
insertion_sort(nums)
puts "插入排序完成后 nums = #{nums}"