small test

.gitignore

+/target

src/main.rs

+use std::io::Read;
+
+fn take_reader(r: &mut impl Read) {
+    let mut buf = [0; 2];
+    let _ = r.read(&mut buf).unwrap();
+    for i in buf.iter() {
+        println!("value = {}", i);
+    }
+}
+fn main() {
+    let mut b: &[u8] = "01is string will be read".as_bytes();
+    let mut b: &[u8] = &[1u8, 2, 3, 4];
+    // let mut b = &[1u8, 2, 3, 4];
+    take_reader(&mut b);
+}