Es 01 Anagram

Cargo.toml

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+[package]
+name = "esercizi"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rand = "0.8.5"
+rand_pcg = { version = "0.3.1", features = ["serde1"] }
+serde = { version = "1.0.197", features = ["derive"] }

src/es01_anagram.rs

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+#![allow(dead_code)]
+
+use std::collections::HashMap;
+
+/** Es.1
+ * Scrivere una funzione che prende in input due riferimenti a stringhe e ritorna
+ * true se le stringhe con anagramma una dell’altra e false altrimenti.
+ */
+pub fn anagrammi(str1: &str, str2: &str) -> bool {
+    if str1.len() != str2.len() {
+        false
+    } else {
+        let mut map = HashMap::new();
+
+        str1.chars().for_each(|x| *map.entry(x).or_insert(0) += 1);
+        str2.chars().for_each(|x| *map.entry(x).or_insert(0) -= 1);
+        map.iter().all(|(_, x)| *x == 0)
+    }
+}

src/lib.rs

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+pub mod es01_anagram;

tests/es01_anagram.rs

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+use esercizi::es01_anagram::anagrammi;
+
+#[test]
+fn test_anagrammi() {
+    assert_eq!(anagrammi("ciao", "ciaq"), false);
+    assert_eq!(anagrammi("anna", "nana"), true);
+    assert_eq!(
+        anagrammi(
+            "fhgsdlifgdsiulfsdkjhvldshvlidhfksdhlvuidxhljfkshlkseghlif",
+            "fiisslfhkgjshsiflvdghdughdhddfiflljhksvklxhhusfildkevllds"
+        ),
+        true
+    );
+    assert_eq!(
+        anagrammi(
+            "fhgsdlifgdsiulfsdkjhvldsqsvlidhfksdhlvuidxhljfkshlkseghlif",
+            "fiisslfhkgjshsiflvdghdughdhddfiflljhksvklxhhusfildkevllds"
+        ),
+        false
+    );
+    assert_eq!(anagrammi("bububububub", "fsdfgaiholka"), false);
+    assert_eq!(anagrammi("baubau", "baubua"), true);
+    assert_eq!(anagrammi("baubab", "baubb"), false);
+}