Much renaming and refreshing of RBE

rustbyexample/primitives.d/array.rs

@@ -0,0 +1,35 @@
+use std::mem;
+
+fn analyze_slice(slice: &[i32]) {
+    println!("first element of the slice: {}", slice[0]);
+    println!("the slice has {} elements", slice.len());
+}
+
+fn main() {
+    let xs: [i32; 5] = [1, 2, 3, 4, 5];
+    let ys: [i32; 500] = [0; 500];
+
+    println!("first element of the array: {}", xs[0]);
+    println!("second element of the array: {}", xs[1]);
+
+    println!("number of elements in the array: {}", xs.len());
+
+    println!("array occupies {} bytes", mem::size_of_val(&xs));
+
+    println!("borrow the whole array as a slice");
+    analyze_slice(&xs);
+
+    println!("borrow a section of the array as a slice");
+    analyze_slice(&ys[1..4]);
+
+    let empty_array: [u32; 0] = [];
+    assert_eq!(&empty_array, &[]);
+    assert_eq!(&empty_array, &[][..]);
+
+    for i in 0..xs.len() + 1 {
+        match xs.get(i) {
+            Some(xval) => println!("{}: {}", i, xval),
+            None => println!("Slow down! {} is too far!", i),
+        }
+    }
+}