X-Git-Url: https://piware.de/gitweb/?p=learn-rust.git;a=blobdiff_plain;f=concepts%2Fsrc%2Fmain.rs;fp=concepts%2Fsrc%2Fmain.rs;h=be26bdb6f2f8bb4212291f5aeb857dcf6bd4e6a8;hp=4b6df6447be9930e5773202f24601cd817722eb8;hb=1354104c119bdcf6e8050c1a26a53bc77dbb85a6;hpb=121e3e9e83ec2bba3f0ebd22bdb1128c83fd5321

diff --git a/concepts/src/main.rs b/concepts/src/main.rs
index 4b6df64..be26bdb 100644
--- a/concepts/src/main.rs
+++ b/concepts/src/main.rs
@@ -1,10 +1,10 @@
-mod word_utils;
 mod lib;
+mod word_utils;
 
 use std::collections::HashMap;
-use std::io::{prelude::*, ErrorKind};
 use std::fs::{self, File};
-use std::{thread, time, sync};
+use std::io::{prelude::*, ErrorKind};
+use std::{sync, thread, time};
 
 use lib::*;
 use word_utils::{first_word, second_word};
@@ -15,7 +15,10 @@ fn test_strings() {
     println!("second word: '{}'", second_word(&s).unwrap());
 
     let s2 = "hello dude blah";
-    println!("second word of single: '{}'", second_word(s2).unwrap_or("(none)"));
+    println!(
+        "second word of single: '{}'",
+        second_word(s2).unwrap_or("(none)")
+    );
 
     match second_word(s2) {
         Some(w) => println!("match: second word of '{}' exists: {}", s2, w),
@@ -66,18 +69,25 @@ fn test_hashmaps() {
     println!("scores after doubling: {:?}", scores);
 
     // double scores of immutable hashmap (rebuild it)
-    let collect_scores: HashMap<_, _> = collect_scores.into_iter()
+    let collect_scores: HashMap<_, _> = collect_scores
+        .into_iter()
         .map(|(k, v)| (k, 2 * v))
         .collect();
-    println!("collect_scores after rebuilding with doubling: {:?}", collect_scores);
+    println!(
+        "collect_scores after rebuilding with doubling: {:?}",
+        collect_scores
+    );
 }
 
 fn test_files() {
     if let Ok(mut f) = File::open("Cargo.toml") {
         let mut contents = String::new();
         match f.read_to_string(&mut contents) {
-            Ok(len) => println!("successfully opened Cargo.toml: {:?}, contents {} bytes:\n{}\n----------", f, len, contents),
-            Err(e) => panic!("could not read file: {:?}", e)
+            Ok(len) => println!(
+                "successfully opened Cargo.toml: {:?}, contents {} bytes:\n{}\n----------",
+                f, len, contents
+            ),
+            Err(e) => panic!("could not read file: {:?}", e),
         }
     } else {
         println!("could not open Cargo.toml");
@@ -102,13 +112,13 @@ fn test_files() {
     // using the '?' operator
     match read_file("Cargo.toml") {
         Ok(s) => println!("Cargo.toml contents:\n{}\n-------------", s),
-        Err(e) => println!("Could not open Cargo.toml: {:?}", e)
+        Err(e) => println!("Could not open Cargo.toml: {:?}", e),
     }
 
     // using std API
     match fs::read_to_string("Cargo.toml") {
         Ok(s) => println!("Cargo.toml contents:\n{}\n-------------", s),
-        Err(e) => println!("Could not open Cargo.toml: {:?}", e)
+        Err(e) => println!("Could not open Cargo.toml: {:?}", e),
     }
 }
 
@@ -125,7 +135,10 @@ fn test_generics() {
     println!("str_list: {:?}", str_list);
 
     let string_list = vec!["aaaa".to_string(), "xxxxx".to_string(), "ffff".to_string()];
-    println!("largest string (with cloning): {}", largest_clone(&string_list));
+    println!(
+        "largest string (with cloning): {}",
+        largest_clone(&string_list)
+    );
     println!("largest string (with ref): {}", largest_ref(&string_list));
     println!("string_list: {:?}", string_list);
 
@@ -144,18 +157,36 @@ fn test_closures() {
         2 * x
     });
 
-    println!("1st int call for value 1: {}", expensive_int_result.value(1));
-    println!("2nd int call for value 1: {}", expensive_int_result.value(1));
-    println!("1st int call for value 2: {}", expensive_int_result.value(2));
+    println!(
+        "1st int call for value 1: {}",
+        expensive_int_result.value(1)
+    );
+    println!(
+        "2nd int call for value 1: {}",
+        expensive_int_result.value(1)
+    );
+    println!(
+        "1st int call for value 2: {}",
+        expensive_int_result.value(2)
+    );
 
     let mut expensive_str_result = Cacher::new(|x: &str| {
         println!("calculating expensive str result for {}", x);
         x.len()
     });
 
-    println!("1st int call for value abc: {}", expensive_str_result.value("abc"));
-    println!("2nd int call for value abc: {}", expensive_str_result.value("abc"));
-    println!("1st int call for value defg: {}", expensive_str_result.value("defg"));
+    println!(
+        "1st int call for value abc: {}",
+        expensive_str_result.value("abc")
+    );
+    println!(
+        "2nd int call for value abc: {}",
+        expensive_str_result.value("abc")
+    );
+    println!(
+        "1st int call for value defg: {}",
+        expensive_str_result.value("defg")
+    );
 }
 
 fn test_iterators() {
@@ -262,13 +293,13 @@ fn test_dyn_traits() {
     post.request_review();
     assert_eq!("", post.content());
 
-    post.approve();  // first
+    post.approve(); // first
     assert_eq!("", post.content());
 
-    post.approve();  // second
+    post.approve(); // second
     assert_eq!(text, post.content());
 
-    post.reject();  // no-op
+    post.reject(); // no-op
     assert_eq!(text, post.content());
 }