All current work

rust-training-fold-custumers/.gitignore

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+/target

rust-training-fold-custumers/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "rust-training-fold-custumers"
+version = "0.1.0"

rust-training-fold-custumers/Cargo.toml

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+[package]
+name = "rust-training-fold-custumers"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

rust-training-fold-custumers/src/main.rs

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+use std::{collections::HashMap};
+
+struct Order {
+    customer: String,
+    price: u32,
+    paid: bool,
+}
+
+fn main() {
+    println!("Hello, world!");
+
+    let orders = vec![
+        Order { customer: "Alice".into(), price: 1200, paid: true },
+        Order { customer: "Bob".into(), price: 500, paid: false },
+        Order { customer: "Alice".into(), price: 800, paid: true },
+        Order { customer: "Charlie".into(), price: 2000, paid: true },
+        Order { customer: "Bob".into(), price: 1500, paid: true },
+        Order { customer: "Alice".into(), price: 300, paid: false },
+    ];
+
+    let unique = orders.iter().fold(HashMap::new(), |mut acc, x| {
+        if x.paid {
+            *acc.entry(&x.customer).or_insert(0)+=x.price;
+        }
+        acc
+    });
+
+    let result = unique.iter().fold(String::new(), |mut acc, (x,y)| {
+        acc += &format!("{} {}\n", x, y);
+        acc
+    });
+
+    println!("{}",result);
+
+}