build

en/docs/chapter_array_and_linkedlist/array.md

@@ -293,6 +293,19 @@ Accessing elements in an array is highly efficient, allowing us to randomly acce
     }
     ```
 
+=== "Ruby"
+
+    ```ruby title="array.rb"
+    ### 随机访问元素 ###
+    def random_access(nums)
+      # 在区间 [0, nums.length) 中随机抽取一个数字
+      random_index = Random.rand 0...(nums.length - 1)
+
+      # 获取并返回随机元素
+      nums[random_index]
+    end
+    ```
+
 === "Zig"
 
     ```zig title="array.zig"
@@ -487,6 +500,21 @@ It's important to note that due to the fixed length of an array, inserting an el
     }
     ```
 
+=== "Ruby"
+
+    ```ruby title="array.rb"
+    ### 在数组的索引 index 处插入元素 num ###
+    def insert(nums, num, index)
+      # 把索引 index 以及之后的所有元素向后移动一位
+      for i in (nums.length - 1).downto(index + 1)
+        nums[i] = nums[i - 1]
+      end
+
+      # 将 num 赋给 index 处的元素
+      nums[index] = num
+    end
+    ```
+
 === "Zig"
 
     ```zig title="array.zig"
@@ -660,6 +688,18 @@ Please note that after deletion, the former last element becomes "meaningless,"
     }
     ```
 
+=== "Ruby"
+
+    ```ruby title="array.rb"
+    ### 删除索引 index 处的元素 ###
+    def remove(nums, index)
+      # 把索引 index 之后的所有元素向前移动一位
+      for i in index...nums.length
+        nums[i] = nums[i + 1] || 0
+      end
+    end
+    ```
+
 === "Zig"
 
     ```zig title="array.zig"
@@ -900,6 +940,25 @@ In most programming languages, we can traverse an array either by using indices
     }
     ```
 
+=== "Ruby"
+
+    ```ruby title="array.rb"
+    ### 遍历数组 ###
+    def traverse(nums)
+      count = 0
+
+      # 通过索引遍历数组
+      for i in 0...nums.length
+        count += nums[i]
+      end
+
+      # 直接遍历数组元素
+      for num in nums
+        count += num
+      end
+    end
+    ```
+
 === "Zig"
 
     ```zig title="array.zig"
@@ -1087,6 +1146,19 @@ Because arrays are linear data structures, this operation is commonly referred t
     }
     ```
 
+=== "Ruby"
+
+    ```ruby title="array.rb"
+    ### 在数组中查找指定元素 ###
+    def find(nums, target)
+      for i in 0...nums.length
+        return i if nums[i] == target
+      end
+
+      -1
+    end
+    ```
+
 === "Zig"
 
     ```zig title="array.zig"
@@ -1310,6 +1382,26 @@ To expand an array,  it's necessary to create a larger array and then copy the e
     }
     ```
 
+=== "Ruby"
+
+    ```ruby title="array.rb"
+    ### 扩展数组长度 ###
+    # 请注意，Ruby 的 Array 是动态数组，可以直接扩展
+    # 为了方便学习，本函数将 Array 看作长度不可变的数组
+    def extend(nums, enlarge)
+      # 初始化一个扩展长度后的数组
+      res = Array.new(nums.length + enlarge, 0)
+
+      # 将原数组中的所有元素复制到新数组
+      for i in 0...nums.length
+        res[i] = nums[i]
+      end
+
+      # 返回扩展后的新数组
+      res
+    end
+    ```
+
 === "Zig"
 
     ```zig title="array.zig"