Bug fixes and improvements (#1732)

* Bug fixes

* Sync zh and zh-hant versions.

* "入列列" -> "入佇列"

* Fix hello_algo_mindmap.png

zh-hant/codes/rust/chapter_array_and_linkedlist/my_list.rs

@@ -19,8 +19,7 @@ struct MyList {
 impl MyList {
     /* 建構子 */
     pub fn new(capacity: usize) -> Self {
-        let mut vec = Vec::new();
-        vec.resize(capacity, 0);
+        let mut vec = vec![0; capacity];
         Self {
             arr: vec,
             capacity,
@@ -92,7 +91,7 @@ impl MyList {
         };
         let num = self.arr[index];
         // 將將索引 index 之後的元素都向前移動一位
-        for j in (index..self.size - 1) {
+        for j in index..self.size - 1 {
             self.arr[j] = self.arr[j + 1];
         }
         // 更新元素數量
@@ -111,7 +110,7 @@ impl MyList {
     }
 
     /* 將串列轉換為陣列 */
-    pub fn to_array(&mut self) -> Vec<i32> {
+    pub fn to_array(&self) -> Vec<i32> {
         // 僅轉換有效長度範圍內的串列元素
         let mut arr = Vec::new();
         for i in 0..self.size {