Week 3 day 3 by Ngozistephen · Pull Request #13 · Bloceducare/Web3bridge-Rust-Masterclass-Cohort-II

Ngozistephen · 2026-02-12T06:55:16Z

Task Submission PR

Student Info:

Registered Name: Stephen Ngozi
Week: week 3
Day: day 3

Task Details:

Task Name: Build a CLI Tool using the Rust Book
Task Description: Briefly describe the task completed.

Checklist Before Submitting:

[yes ] My code follows the repository folder structure.
[ yes] I have properly named my files and folders.
[ yes] I have documented my code where necessary.
[ yes ] I have tested my solution and ensured it works as expected.

Additional Comments:

If any, mention here.

Copilot

Pull request overview

This PR submits Rust coursework projects under submissions/, primarily a Week 3 Day 3 “minigrep”-style CLI (from The Rust Book), but it also includes additional Week 2 Day 3 and Day 5 projects.

Changes:

Added a Week 3 Day 3 CLI tool crate (stephenngozi-build-cli-project) with config parsing, file search (case-sensitive/insensitive), and unit tests.
Added a Week 2 Day 5 expense-tracker CLI project that persists expenses to a text file.
Added a Week 2 Day 3 user-input parsing example project.

Reviewed changes

Copilot reviewed 15 out of 18 changed files in this pull request and generated 11 comments.

Show a summary per file

File	Description
submissions/week-3/day-3/stephenngozi-build-cli-project/src/main.rs	CLI entrypoint: parse args, build config, run search
submissions/week-3/day-3/stephenngozi-build-cli-project/src/lib.rs	Core search logic, Config, case-sensitivity toggle, unit tests
submissions/week-3/day-3/stephenngozi-build-cli-project/poem.txt	Sample input file for the CLI tool
submissions/week-3/day-3/stephenngozi-build-cli-project/output.txt	Captured sample output for a run
submissions/week-3/day-3/stephenngozi-build-cli-project/Cargo.toml	Rust crate manifest
submissions/week-3/day-3/stephenngozi-build-cli-project/Cargo.lock	Dependency lockfile
submissions/week-3/day-3/stephenngozi-build-cli-project/.gitignore	Ignore Rust `target/`
submissions/week-2/day-5/Stephen-Ngozi-Merkle-Tree/src/main.rs	Expense tracker CLI UI loop (add/view/update/delete/save)
submissions/week-2/day-5/Stephen-Ngozi-Merkle-Tree/src/tracker.rs	ExpenseTracker storage + save-to-file
submissions/week-2/day-5/Stephen-Ngozi-Merkle-Tree/src/expense.rs	Expense and TransactionType definitions
submissions/week-2/day-5/Stephen-Ngozi-Merkle-Tree/stephen_expences.txt	Example saved output file
submissions/week-2/day-5/Stephen-Ngozi-Merkle-Tree/Cargo.toml	Rust crate manifest
submissions/week-2/day-5/Stephen-Ngozi-Merkle-Tree/Cargo.lock	Dependency lockfile
submissions/week-2/day-5/Stephen-Ngozi-Merkle-Tree/.gitignore	Ignore Rust `target/`
submissions/week-2/day-3/Stephen-Ngozi-User-Input/src/main.rs	Simple stdin parsing + enum-based handling
submissions/week-2/day-3/Stephen-Ngozi-User-Input/Cargo.toml	Rust crate manifest
submissions/week-2/day-3/Stephen-Ngozi-User-Input/Cargo.lock	Dependency lockfile
submissions/week-2/day-3/Stephen-Ngozi-User-Input/.gitignore	Ignore Rust `target/`

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Copilot · 2026-02-12T06:59:25Z

submissions/week-3/day-3/stephenngozi-build-cli-project/src/main.rs

+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::new(&args).unwrap_or_else(|err |{
+        eprintln!("Problem parsing argumemts: {}", err);


Typo in error message: "argumemts" should be "arguments" so users see a professional, searchable message.

Suggested change

eprintln!("Problem parsing argumemts: {}", err);

eprintln!("Problem parsing arguments: {}", err);

Copilot · 2026-02-12T06:59:26Z

submissions/week-2/day-5/Stephen-Ngozi-Merkle-Tree/src/tracker.rs

+    pub fn save_to_file(&self, filename: &str) {
+        let mut file = File::create(filename).expect("Could not create file");
+
+        for expense in self.values.values() {


HashMap::values() iteration order is nondeterministic, so save_to_file can write expenses in a random order (the committed stephen_expences.txt already shows IDs out of order). Consider iterating in a stable order (e.g., collect/sort by id, or reuse view_all()).

Suggested change

for expense in self.values.values() {

for expense in self.view_all().iter() {

Copilot · 2026-02-12T06:59:26Z

submissions/week-2/day-5/Stephen-Ngozi-Merkle-Tree/src/main.rs

+                if tracker.update(id, amount, tx_type){
+                    println!("Expense Updated Successfu");
+
+                    if let Some(expense) = tracker.values.get(&id) {
+                         println!("ID: {}, Name: {}, Amount: Naria{:.2}, Type: {:?}", 


If tracker.update(...) returns false (ID not found), the user gets no feedback and the program silently continues. Add an else branch to print a not-found message (similar to delete).

Copilot · 2026-02-12T06:59:26Z

submissions/week-2/day-5/Stephen-Ngozi-Merkle-Tree/src/main.rs

+                    tracker.save_to_file("stephen_expences.txt");
+                    println!("Data saved to stephen_expences.txt");


The filename/message uses "expences" (typo). Consider renaming to "stephen_expenses.txt" and updating the saved output file accordingly so naming matches "expenses" throughout.

Suggested change

tracker.save_to_file("stephen_expences.txt");

println!("Data saved to stephen_expences.txt");

tracker.save_to_file("stephen_expenses.txt");

println!("Data saved to stephen_expenses.txt");

Copilot · 2026-02-12T06:59:26Z

submissions/week-2/day-5/Stephen-Ngozi-Merkle-Tree/src/main.rs

+                    }  
+                }
+            } else if input == "3" {
+                println!("Enter the ID of the Expence");


Typo in prompt: "Expence" should be "Expense".

Copilot · 2026-02-12T06:59:27Z

submissions/week-2/day-5/Stephen-Ngozi-Merkle-Tree/src/main.rs

+                let id: u8 = id_input.trim().parse().expect("Please enter a valid ID");
+
+                if tracker.delete(id){
+                    println!(" Your Expence is Deleted ");


Typo in status message: "Expence" should be "Expense".

Suggested change

println!(" Your Expence is Deleted ");

println!(" Your Expense is Deleted ");

Copilot · 2026-02-12T06:59:27Z

submissions/week-2/day-3/Stephen-Ngozi-User-Input/src/main.rs

+
+use std::io;
+enum PowerStatus {
+    Off,
+    Sleep,
+    Reboot,


PR description says this is a Week 3 Day 3 submission, but this PR also adds Week 2 Day 3 / Day 5 projects. Per the repo submission guidance, week/day submissions should be kept scoped to the relevant folder; consider moving Week 2 additions into separate PR(s).

Copilot · 2026-02-12T06:59:27Z

submissions/week-3/day-3/stephenngozi-build-cli-project/src/main.rs

+    });
+
+
+    println!(" searching for {}", config.query);


The log line has a leading space in the format string, which makes output inconsistent (see output.txt) and harder to copy/paste. Consider removing the leading whitespace.

Suggested change

println!(" searching for {}", config.query);

println!("searching for {}", config.query);

Copilot · 2026-02-12T06:59:27Z

submissions/week-2/day-5/Stephen-Ngozi-Merkle-Tree/src/tracker.rs

+    pub fn save_to_file(&self, filename: &str) {
+        let mut file = File::create(filename).expect("Could not create file");


save_to_file panics on file creation/write errors via expect. For a CLI, it’s better to return a Result (or bubble up an io::Result) so the caller can report the error without crashing.

Copilot · 2026-02-12T06:59:28Z

submissions/week-2/day-5/Stephen-Ngozi-Merkle-Tree/src/main.rs

+                        println!("ID: {} | Name: {} | Amount: Naria{:.2} | Type: {:?}", 
+                                expense.id, expense.name, expense.amount, expense.tx_type);


Typo in output label: "Naria" is likely meant to be "Naira".

Ngozistephen added 6 commits February 12, 2026 07:35

Add Rust project files and .gitignore

8ebbcb3

Initialize Week 2 Day 5 Assignment - Stephen Ngozi

3eefd82

Assignment on user-Input

57f9c74

Add Week 2 Day 3 task for User Input

14de3ba

Add Week 3 Day-3 - CLI- Project Stephen Ngozi

fc1e777

Add Week 3 Day 3 task for StephenNgozi Build CLI Project

039b0d9

Copilot AI review requested due to automatic review settings February 12, 2026 06:55

Copilot started reviewing on behalf of Ngozistephen February 12, 2026 06:55 View session

Copilot AI reviewed Feb 12, 2026

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Week 3 day 3#13

Week 3 day 3#13
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	eprintln!("Problem parsing argumemts: {}", err);
	eprintln!("Problem parsing arguments: {}", err);

	for expense in self.values.values() {
	for expense in self.view_all().iter() {

		tracker.save_to_file("stephen_expences.txt");
		println!("Data saved to stephen_expences.txt");

	println!(" Your Expence is Deleted ");
	println!(" Your Expense is Deleted ");

	println!(" searching for {}", config.query);
	println!("searching for {}", config.query);

		pub fn save_to_file(&self, filename: &str) {
		let mut file = File::create(filename).expect("Could not create file");

		println!("ID: {} \| Name: {} \| Amount: Naria{:.2} \| Type: {:?}",
		expense.id, expense.name, expense.amount, expense.tx_type);

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Ngozistephen commented Feb 12, 2026

Task Submission PR

Student Info:

Task Details:

Checklist Before Submitting:

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