Merge pull request #609 from Reoooh/master

添加0977有序数组的平方 Ruby 版本

problems/0977.有序数组的平方.md

@@ -252,6 +252,24 @@ func sortedSquares(_ nums: [Int]) -> [Int] {
 }
 ```
 
+Ruby:
+
+```ruby
+def sorted_squares(nums)
+  left, right, result = 0, nums.size - 1, []
+  while left <= right
+    if nums[left]**2 > nums[right]**2
+      result << nums[left]**2
+      left += 1
+    else
+      result << nums[right]**2
+      right -= 1
+    end
+  end
+  result.reverse
+end
+```
+
 
 
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