From 2e92e3463cc8882347efd35727e64070df25ca1f Mon Sep 17 00:00:00 2001
From: Nak0_x <nak0x@proton.me>
Date: Sat, 5 Sep 2026 00:34:55 +0200
Subject: [PATCH] feat: rbe 1.2.2.1: test case list w/ activity

---
 .../list-display/Cargo.lock                   |  7 +++++
 .../list-display/Cargo.toml                   |  6 ++++
 .../list-display/src/main.rs                  | 29 +++++++++++++++++++
 3 files changed, 42 insertions(+)
 create mode 100644 1-hello-world/formatted-printing/list-display/Cargo.lock
 create mode 100644 1-hello-world/formatted-printing/list-display/Cargo.toml
 create mode 100644 1-hello-world/formatted-printing/list-display/src/main.rs

diff --git a/1-hello-world/formatted-printing/list-display/Cargo.lock b/1-hello-world/formatted-printing/list-display/Cargo.lock
new file mode 100644
index 0000000..f4937d4
--- /dev/null
+++ b/1-hello-world/formatted-printing/list-display/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "list-display"
+version = "0.1.0"
diff --git a/1-hello-world/formatted-printing/list-display/Cargo.toml b/1-hello-world/formatted-printing/list-display/Cargo.toml
new file mode 100644
index 0000000..3b26e26
--- /dev/null
+++ b/1-hello-world/formatted-printing/list-display/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "list-display"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
diff --git a/1-hello-world/formatted-printing/list-display/src/main.rs b/1-hello-world/formatted-printing/list-display/src/main.rs
new file mode 100644
index 0000000..17a2051
--- /dev/null
+++ b/1-hello-world/formatted-printing/list-display/src/main.rs
@@ -0,0 +1,29 @@
+// Import the `fmt` module.
+use std::fmt;
+
+// Define a structuree named `List` containing a `Vec`.
+struct List(Vec<i32>);
+
+impl fmt::Display for List {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        // Create a reference to the Vec<i32> stored in the List struct.
+        let vec = &self.0;
+
+        write!(f, "[")?;
+
+        // Iterate over `v` in `vec` while enumerating the iteration
+        // index in `index`.
+        for (index, v) in vec.iter().enumerate() {
+            if index != 0 { write!(f, ", ")?; }
+            write!(f, "{index}: {v}")?;
+        }
+
+        // Close the opend bracket and return a fmt::Result value.
+        write!(f, "]")
+    }
+}
+
+fn main() {
+    let v = List(vec![1, 2, 3]);
+    println!("{}", v);
+}