Starting on hashmaps.

exercises/collections/hashmap1.rs

@@ -11,17 +11,19 @@
 // Execute the command `rustlings hint hashmap1` if you need
 // hints.
 
-// I AM NOT DONE
 
 use std::collections::HashMap;
 
 fn fruit_basket() -> HashMap<String, u32> {
-    let mut basket = // TODO: declare your hash map here.
+    // TODO: declare your hash map here.
-
+    let mut basket =  HashMap::new();
-    // Two bananas are already given for you :)
+    
-    basket.insert(String::from("banana"), 2);
-
     // TODO: Put more fruits in your basket here.
+    // Two bananas are already given for you :)
+    // Format is basket.insert(String,u32);
+    basket.insert(String::from("banana"), 2);
+    basket.insert(String::from("bapple"),4);
+    basket.insert(String::from("horange"),1);
 
     basket
 }

exercises/collections/hashmap2.rs

@@ -4,8 +4,9 @@
 // represents the name of the fruit and the value represents how many
 // of that particular fruit is in the basket. You have to put *MORE
 // THAN 11* fruits in the basket. Three types of fruits - Apple (4),
-// Mango (2) and Lychee (5) are already given in the basket. You are
+// Mango (2) and Lychee (5) are already given in the basket. 
-// not allowed to insert any more of these fruits!
+//
+// You are not allowed to insert any more of these fruits!
 //
 // Make me pass the tests!
 //

exercises/collections/vec1.rs

@@ -4,11 +4,14 @@
 // Make me compile and pass the test!
 // Execute the command `rustlings hint vec1` if you need hints.
 
-// I AM NOT DONE
 
 fn array_and_vec() -> ([i32; 4], Vec<i32>) {
     let a = [10, 20, 30, 40]; // a plain array
-    let v = // TODO: declare your vector here with the macro for vectors
+    // TODO: declare your vector here with the macro for vectors
+    let mut v: Vec<i32> = Vec::new(); // make v a mutable vector!
+    for i in a.iter() { // making at iterable
+        v.push(*i) // leting i establish the expected type here
+    }
 
     (a, v)
 }

exercises/collections/vec2.rs

@@ -7,12 +7,15 @@
 // Execute the command `rustlings hint vec2` if you need
 // hints.
 
-// I AM NOT DONE
 
 fn vec_loop(mut v: Vec<i32>) -> Vec<i32> {
     for i in v.iter_mut() {
         // TODO: Fill this up so that each element in the Vec `v` is
         // multiplied by 2.
+        // not so obvious answer, this is because multiplication is a right action in Rust <20><> 
+        *i = *i*2;
+        // slick answer below
+        //*i *= 2; // pythonish: i = 2*i
     }
 
     // At this point, `v` should be equal to [4, 8, 12, 16, 20].

exercises/modules/modules1.rs

@@ -1,15 +1,14 @@
 // modules1.rs
 // Make me compile! Execute `rustlings hint modules1` for hints :)
 
-// I AM NOT DONE
 
-mod sausage_factory {
+mod sausage_factory { // adding pub here doesn't seem to matter . . . If I had to guess, moduless default to public.
     // Don't let anybody outside of this module see this!
     fn get_secret_recipe() -> String {
         String::from("Ginger")
     }
 
-    fn make_sausage() {
+    pub fn make_sausage() { // adding pub here fixes the problem. I think the lesson is that functions are inherely private, and have to be explicitly made public?
         get_secret_recipe();
         println!("sausage!");
     }

exercises/modules/modules2.rs

@@ -3,13 +3,12 @@
 // 'use' and 'as' keywords. Fix these 'use' statements to make the code compile.
 // Make me compile! Execute `rustlings hint modules2` for hints :)
 
-// I AM NOT DONE
 
 mod delicious_snacks {
 
     // TODO: Fix these use statements
-    use self::fruits::PEAR as ???
+    pub use self::fruits::PEAR as fruit; // so I'm telling this that PEAR is a fruit.
-    use self::veggies::CUCUMBER as ???
+    pub use self::veggies::CUCUMBER as veggie; // and here I'm saying CUCUMBER is a veggie.
 
     mod fruits {
         pub const PEAR: &'static str = "Pear";
@@ -25,7 +24,7 @@ mod delicious_snacks {
 fn main() {
     println!(
         "favorite snacks: {} and {}",
-        delicious_snacks::fruit,
+        delicious_snacks::fruit, // So we're looking for a delicious snack, but it has to be fruit.
-        delicious_snacks::veggie
+        delicious_snacks::veggie // and here it needs to be veggie
     );
 }

exercises/modules/modules3.rs

@@ -5,10 +5,11 @@
 // from the std::time module. Bonus style points if you can do it with one line!
 // Make me compile! Execute `rustlings hint modules3` for hints :)
 
-// I AM NOT DONE
 
 // TODO: Complete this use statement
-use ???
+use std::time::{UNIX_EPOCH,SystemTime}; // Hey, I did it! 
+// pub use std::time::SystemTime as SystemTime; // This is redundant, you just need everything before as
+// pub use std::time::UNIX_EPOCH as UNIX_EPOCH; 
 
 fn main() {
     match SystemTime::now().duration_since(UNIX_EPOCH) {