Merge pull request 'dev' (#5) from dev into master

Reviewed-on: #5

day08/generic_day08/src/main.rs

@@ -25,6 +25,15 @@ impl<T> Point<T> {
     }
 }
 
+impl<T, U> NewPoint<T, U> {
+    fn mixup<V, W>(self, other: NewPoint<V, W>) -> NewPoint<T, W> {
+        NewPoint {
+            x: self.x,
+            y: other.y,
+        }
+    }
+}
+
 fn main() {
     let num_list = vec![1, 5, 2, 8, 3, 9, 3, 0, 4, 7];
     let res = largest_i32(&num_list);
@@ -35,9 +44,11 @@ fn main() {
     let res = largest_char(&char_list);
     println!("{}", res);
     let integer = Point { x: 5, y: 10 };
-    let float = Point { x: 5.5, y: 10.5 };
     let mix = NewPoint { x: 5, y: 10.5 };
     println!("{}", integer.x());
+    let mix2 = NewPoint { x: 7, y: 2.5 };
+    let new = mix.mixup(mix2);
+    println!("{}{}", new.x, new.y)
 }
 
 fn largest_i32(list: &[i32]) -> i32 {

day08/trait_day08/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "trait_day08"
+version = "0.1.0"
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

day08/trait_day08/src/lib.rs

@@ -0,0 +1,58 @@
+/*
+** encoding: utf-8
+** @author:        Jinguxn
+** @contact:       chenjin.qian@xquant.com
+**                 jingxun@lynchow.com
+** @file:          lib.py
+** @create-time:   2021-11-29 15:09
+** @last-modified: 2021-11-29 15:09
+** @description:   Input here.
+*/
+
+pub struct NewsArticle {
+    pub headline: String,
+    pub location: String,
+    pub author: String,
+    pub content: String,
+}
+
+pub struct Tweet {
+    pub username: String,
+    pub content: String,
+    pub reply: bool,
+    pub retweet: bool,
+}
+
+/*impl Summary for NewsArticle {
+    fn summarize(&self) -> String {
+        format!("{}, by {} ({})", self.headline, self.author, self.location)
+    }
+}*/
+
+impl Summary for NewsArticle {
+    fn summarize_authort(&self) -> String {
+        format!("@{}", self.author)
+    }
+}
+
+impl Summary for Tweet {
+    fn summarize_authort(&self) -> String {
+        format!("@{}", self.username)
+    }
+
+    fn summarize(&self) -> String {
+        format!("{}:{}", self.username, self.content)
+    }
+}
+
+pub trait Summary {
+    fn summarize_authort(&self) -> String;
+
+    fn summarize(&self) -> String {
+        format!("(Read more from {}...)", self.summarize_authort())
+    }
+}
+
+pub fn notify(item:impl Summary){
+    println!("Breaking news! {}", item.summarize());
+}

day08/trait_day08/src/main.rs

@@ -0,0 +1,30 @@
+/*
+** encoding: utf-8
+** @author:        Jinguxn
+** @contact:       chenjin.qian@xquant.com
+**                 jingxun@lynchow.com
+** @file:          main.py
+** @create-time:   2021-11-29 15:09
+** @last-modified: 2021-11-29 15:09
+** @description:   Input here.
+*/
+
+use trait_day08::{Tweet, Summary, NewsArticle, notify};
+
+fn main() {
+    let tweet = Tweet {
+        username: String::from("jingxun"),
+        content: String::from("of course, as you probably alread know, people"),
+        reply: false,
+        retweet: false,
+    };
+    println!("1 new tweet: {}", tweet.summarize());
+    let article = NewsArticle {
+        headline: String::from("Penguins win the Stanley Cup Championship!"),
+        location: String::from("Pittsburgh, PA, USA"),
+        author: String::from("Iceburgh"),
+        content: String::from("The Pittsubrgh Penguins once again are the best hockey team in the NHL."),
+    };
+    println!("New article available! {}", article.summarize());
+    notify(article);
+}