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complete: hashmap

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This commit is contained in:
seth 2021-06-22 14:36:50 +08:00
parent 6680e6d202
commit 26374eb122
2 changed files with 4 additions and 5 deletions
exercises/collections
hashmap1.rshashmap2.rs

6
exercises/collections/hashmap1.rs
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@ -11,17 +11,17 @@
// Execute the command `rustlings hint hashmap1` if you need // Execute the command `rustlings hint hashmap1` if you need
// hints. // hints.
// I AM NOT DONE
use std::collections::HashMap; use std::collections::HashMap;
fn fruit_basket() -> HashMap<String, u32> { fn fruit_basket() -> HashMap<String, u32> {
let mut basket = // TODO: declare your hash map here. let mut basket = HashMap::new();// TODO: declare your hash map here.
// Two bananas are already given for you :) // Two bananas are already given for you :)
basket.insert(String::from("banana"), 2); basket.insert(String::from("banana"), 2);
// TODO: Put more fruits in your basket here. // TODO: Put more fruits in your basket here.
basket.insert(String::from("apple"), 2);
basket.insert(String::from("orange"), 2);
basket basket
} }

3
exercises/collections/hashmap2.rs
View file

@ -12,8 +12,6 @@
// Execute the command `rustlings hint hashmap2` if you need // Execute the command `rustlings hint hashmap2` if you need
// hints. // hints.
// I AM NOT DONE
use std::collections::HashMap; use std::collections::HashMap;
#[derive(Hash, PartialEq, Eq)] #[derive(Hash, PartialEq, Eq)]
@ -38,6 +36,7 @@ fn fruit_basket(basket: &mut HashMap<Fruit, u32>) {
// TODO: Put new fruits if not already present. Note that you // TODO: Put new fruits if not already present. Note that you
// are not allowed to put any type of fruit that's already // are not allowed to put any type of fruit that's already
// present! // present!
basket.entry(fruit).or_insert(1);
} }
} }