Add a bunch of code

Signed-off-by: Carlos Maiolino <[email protected]>

1 files changed, 40 insertions, 0 deletions

diff --git a/rust/arrays.rs b/rust/arrays.rs
new file mode 100644
index 0000000..2e22751
--- /dev/null
+++ b/rust/arrays.rs
@@ -0,0 +1,40 @@
+// ARRAYS - similar than C
+//
+//array size must be known at compile time
+//
+// signature: [T; length]
+//  let var: [T; length] = foo
+
+fn main() {
+    let arr: [i32; 5] = [1, 2, 3, 4, 5];
+
+    // Implicit declaration:
+    let myarr = ['a', 'b', 'c'];
+    println!("{}", arr.len());
+
+    // Initialize all elements: [value, num of elements]
+    let auto_arr: [i32; 100] = [1; 100];
+
+    for c in arr {
+        print!("{} ", c);
+    }
+
+    for c in myarr {
+        print!("{} ", c);
+    }
+    println!("");
+
+    println!("array sizes: arr {} myarr {}", std::mem::size_of_val(&arr),
+                                          std::mem::size_of_val(&myarr));
+
+    // Accessing specific elements in an array can be done via indexing or .get method
+    // .get method returns an Option<T>, so we also need to use unwrap:
+
+    let many: [i32; 10] = [1, 3, 4, 6, 8, 34, 60, 44, 94, 10];
+
+    // great, either many[3] or &many[3] works, shrug
+    println!("Via index: {} - Via get method: {}",
+                &many[3], many.get(6).unwrap());
+}
+
+