From 46e3cf079335a43ada945dfd04f451ac54687b03 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=90=B4=E4=BF=8A=E5=9F=8E?=
 <41775850+wujunchengman@users.noreply.github.com>
Date: Sun, 17 Nov 2024 19:58:14 +0800
Subject: [PATCH] Update main.rs

fix "While let Conditional Loops" Code not match
---
 .../listing-19-02/src/main.rs                     | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/listings/ch19-patterns-and-matching/listing-19-02/src/main.rs b/listings/ch19-patterns-and-matching/listing-19-02/src/main.rs
index 4605557..2479d84 100644
--- a/listings/ch19-patterns-and-matching/listing-19-02/src/main.rs
+++ b/listings/ch19-patterns-and-matching/listing-19-02/src/main.rs
@@ -1,14 +1,13 @@
 fn main() {
     // ANCHOR: here
-    let (tx, rx) = std::sync::mpsc::channel();
-    std::thread::spawn(move || {
-        for val in [1, 2, 3] {
-            tx.send(val).unwrap();
-        }
-    });
+    let mut stack = Vec::new();
 
-    while let Ok(value) = rx.recv() {
-        println!("{value}");
+    stack.push(1);
+    stack.push(2);
+    stack.push(3);
+
+    while let Some(top) = stack.pop() {
+        println!("{top}");
     }
     // ANCHOR_END: here
 }