(rust) update punctuation and adding some clarifications

subjects/boxing_todo/README.md

@@ -2,7 +2,7 @@
 
 ### Instructions
 
-The objective is create an api to parse a list of _todos_ that is organized in a JSON file,
+The objective is to create an api to parse a list of _todos_ that is organized in a JSON file,
 handling all possible errors in a multiple error system.
 
 Organization of the JSON file:
@@ -17,9 +17,9 @@ Organization of the JSON file:
 }
 ```
 
-#### Error.rs
+#### err.rs
 
-Create a module in another file called **error.rs** which handles the boxing of errors.
+Create a module in another file called **err.rs** which handles the boxing of errors.
 This module must implement an `enum` called `ParseErr` which will take care of the
 parsing errors. It must have the following elements:
 
@@ -29,8 +29,8 @@ parsing errors. It must have the following elements:
 A structure called `ReadErr` which will take care of the reading errors, having just an element called `child_err` of type `Box<dyn Error>`.
 
 For each data structure you will have to implement a function called `fmt` for the trait `Display` which writes
-out the message **"Failed to parse todo"** in case it is a parsing error. Otherwise, it should write the message
-**"Failed to read todo file"**.
+out the message **"Fail to parse todo"** in case it is a parsing error. Otherwise, it should write the message
+**"Fail to read todo file"**.
 For the `Error` trait the following functions (methods) have to be implemented:
 
 - `source` which returns an `Option` with the error:
@@ -54,7 +54,7 @@ Basically it must parse and read the JSON file and return the `TodoList` if ever
 
 ### Expected Functions
 
-For **error.rs**
+For **err.rs**
 
 ```rust
 use std::fmt;
@@ -99,23 +99,23 @@ impl Error for ReadErr {
 for **lib.rs**
 
 ```rust
-mod error;
-use error::{ ParseErr, ReadErr };
+mod err;
+use err::{ ParseErr, ReadErr };
 
 pub use json::{parse, stringify};
 pub use std::error::Error;
 
 #[derive(Debug, Eq, PartialEq)]
 pub struct Task {
-    id: u32,
-    description: String,
-    level: u32,
+    pub id: u32,
+    pub description: String,
+    pub level: u32,
 }
 
 #[derive(Debug, Eq, PartialEq)]
 pub struct TodoList {
-    title: String,
-    tasks: Vec<Task>,
+    pub title: String,
+    pub tasks: Vec<Task>,
 }
 
 impl TodoList {
@@ -168,6 +168,6 @@ And its output:
 $ cargo run
 TodoList { title: "TODO LIST FOR PISCINE RUST", tasks: [Task { id: 0, description: "do this", level: 0 }, Task { id: 1, description: "do that", level: 5 }] }
 Todo List parse failed: None
-Fail to parses todo Some(Malformed(UnexpectedCharacter { ch: ',', line: 2, column: 18 }))
+Fail to parse todo Some(Malformed(UnexpectedCharacter { ch: ',', line: 2, column: 18 }))
 $
 ```

subjects/does_it_fit/README.md

@@ -6,7 +6,7 @@ Using the `areas_volumes` module provided, create two **functions**:
 
 - `area_fit` which receives 6 arguments and returns a boolean:
 
-  - `x` and `y`, length and width of the square in which it is going to be tried to fit the geometrical shapes (both usize)
+  - `x` and `y`, length and width of the Rectangle in which it is going to be tried to fit the geometrical shapes (both usize)
   - `objects`, the type of geometrical shape(s) which are going to be tried to be fitted in the square (areas_volumes::GeometricalShapes)
   - `times`, the number of geometrical shapes which are going to be tried to be fitted in the square (usize)
   - `a` and `b`, the dimensions which the plane(s) shape(s) passed will have (both usize)
@@ -20,7 +20,7 @@ Using the `areas_volumes` module provided, create two **functions**:
   - `objects`, the type of geometrical volume(s) which are going to be tried to be fitted in the box (areas_volumes::GeometricalVolumes)
   - `times`, the number of geometrical volumes which are going to be tried to be fitted in the box (usize)
   - `a`, `b` and `c`, the dimensions which the geometrical volume(s) passed will have (all of them usize)
-  - `a` will refer to the side of the Cube, the radius of the Sphere, the side_a of the Parallelepipede, the area of the base of the Triangular Pyramid or the base radius of the Cone
+  - `a` will refer to the side of the Cube, the radius of the Sphere, the side_a of the Parallelepiped, the area of the base of the Triangular Pyramid or the base radius of the Cone
   - `b` will refer to the side_b of the Parallelepiped, the height of the Triangular Pyramid or the height of the Cone
   - `c` will refer to the side_c of the Parallelepiped
   - `volume_fit` should return `true` if the geometrical volume(s) fit inside of the box.
@@ -128,7 +128,7 @@ fn main() {
 		volume_fit(5, 5, 5, GeometricalVolumes::Sphere, 3, 2, 0, 0)
 	);
 	println!(
-		"Do 3 triangles (5 base and 3 height) fit in a 5 by 7 by 5 box? {}",
+		"Does 1 parallelepiped (6 base, 7 height and depth 4) fit in a 5 by 7 by 5 parallelepiped? {}",
 		volume_fit(5, 7, 5, GeometricalVolumes::Parallelepiped, 1, 6, 7, 4)
 	);
 }
@@ -141,6 +141,6 @@ $ cargo run
 Do 100 rectangles (2x1) fit in a 2 by 4 square? false
 Do 3 triangles (5 base and 3 height) fit in a 5 by 5 square? true
 Do 3 spheres (2 radius) fit in a 5 by 5 by 5 box? true
-Do 3 triangles (5 base and 3 height) fit in a 5 by 7 by 5 box? true
+Does 1 parallelepiped (6 base, 7 height and depth 4) fit in a 5 by 7 by 5 parallelepiped? true
 $
 ```

subjects/error_types/README.md

@@ -44,6 +44,12 @@ ex: ("password", "asdaSD\_")
 - [Error types](https://doc.rust-lang.org/rust-by-example/error/multiple_error_types/define_error_type.html)
 - [Struct NaiveDate](https://docs.rs/chrono/0.4.19/chrono/naive/struct.NaiveDate.html)
 
+
+### Dependencies
+
+chrono = "0.4"
+
+
 ### Expected Function
 
 ```rust
@@ -60,8 +66,8 @@ impl FErr {
 
 #[derive(Debug, Eq, PartialEq)]
 pub enum SexType {
-    // expected public fields
 }
+
 #[derive(Debug, Eq, PartialEq)]
 pub struct Form {
     // expected public fields
@@ -87,8 +93,8 @@ use error_types::*;
 
 fn main() {
     let mut form_output = Form::new(
-        String::from("Alice"),
-        String::from("Bear"),
+        String::from("Lee"),
+        String::from("Silva"),
         create_date("2015-09-05"),
         SexType::Male,
         String::from("Africa"),

subjects/unwrap_or_expect/README.md

@@ -2,19 +2,20 @@
 
 ### Instructions
 
-A **function** called **odd_to_even** will be given, which returns a `Result`. If an error occurs the function will
-return a tuple with a string, stating the error, and a vector with the elements which causing the error.
+A **function** called **odd_to_even** will be given, which returns a `Result`. If there is an even value in the vector, the function will
+return a tuple with a string, stating the error, and a vector with the elements that caused the error.
+
 
 The objective is to execute the `odd_to_even` function and handle the error returned by it.
 
 Create the following functions which receives a vector :
 
-- `expect` which returns the error adding the string "ERROR "
+- `expect` which returns the error adding the string "ERROR"
 - `unwrap_or` which in case of error returns an empty vector
 - `unwrap_err` which returns error if its `Ok` and returns the
   string containing the error in case of `Err`
 - `unwrap` which unwraps the `Result`
-- `unwrap_or_else` which in case of error returns the vector of elements which causes the error
+- `unwrap_or_else` which in case of error returns the vector of elements that caused the error
 
 ### Notions