mod word_utils;
+mod lib;
use std::collections::HashMap;
use std::io::{prelude::*, ErrorKind};
use std::fs::{self, File};
+use lib::*;
use word_utils::{first_word, second_word};
fn test_strings() {
println!("collect_scores after rebuilding with doubling: {:?}", collect_scores);
}
-fn read_file(path: &str) -> Result<String, std::io::Error> {
- let mut s = String::new();
- File::open(path)?
- .read_to_string(&mut s)?;
- Ok(s)
-}
-
fn test_files() {
if let Ok(mut f) = File::open("Cargo.toml") {
let mut contents = String::new();
}
}
+fn test_generics() {
+ let num_list = vec![3, 42, -7, 100, 0];
+ println!("largest number: {}", largest(&num_list));
+ println!("num_list: {:?}", num_list);
+
+ let char_list = vec!['a', 'y', 'q', 'm'];
+ println!("largest char: {}", largest(&char_list));
+
+ let str_list = vec!["hello", "world", "blue", "planet"];
+ println!("largest str: {}", largest(&str_list));
+ 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 ref): {}", largest_ref(&string_list));
+ println!("string_list: {:?}", string_list);
+
+ let s1 = String::from("abcd");
+ let l;
+ {
+ let s2 = "efghi";
+ l = longest(&s1, s2);
+ }
+ println!("longest string: {}", l);
+}
+
+fn test_closures() {
+ let mut expensive_int_result = Cacher::new(|x| {
+ println!("calculating expensive int result for {}", x);
+ 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));
+
+ 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"));
+}
+
fn main() {
test_strings();
test_vectors();
test_hashmaps();
test_files();
+ test_generics();
+ test_closures();
}