add randome get data

Author: DaviRain-Su

Cargo.lock

@@ -22,6 +22,7 @@ anyhow = "1.0.60"
 libm = "0.2.5"
 log = "0.4.17"
 num-traits = "0.2.15"
+rand = "0.8.5"
 sha2 = "0.10"
 thiserror = "1.0.61"
 

rust/Cargo.toml

@@ -1,3 +1,5 @@
+use rand::Rng;
+
 fn byte_to_hex(byte: &u8) -> String {
     format!("{byte:02x}")
 }
@@ -8,3 +10,12 @@ pub fn to_hex_string<T: Clone + Into<Vec<u8>>>(bytes: &T) -> String {
 
     hex_vec.join("")
 }
+
+/* 随机访问元素 */
+pub fn random_access<T: Clone>(nums: &[T]) -> T {
+    // 在区间 [0, nums.len()) 中随机抽取一个数字
+    let random_index = rand::thread_rng().gen_range(0..nums.len());
+    // 获取并返回随机元素
+    let random_num = &nums[random_index];
+    random_num.clone()
+}