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rust-tutor/exercises/vec-stats/vec-stats-exercise.md
Reality Enjoyer 1d9dc7559d first exercise!
- create exercise vec statistics calculator (shout out claude)
- finish hacky solution (it works... but at what cost)
- update current state
2026-01-14 09:16:27 +00:00

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Markdown

# Exercise: Vec Statistics Calculator
**Concepts practiced:** Vec operations, HashMap for counting, basic math functions
**Objective:** Build a simple stats calculator that takes a list of numbers and returns basic statistics
## Requirements:
- Create a function `calculate_stats(numbers: Vec<i32>) -> (f64, i32, i32)` that returns (mean, median, mode)
- Use Vec sorting for median calculation
- Use HashMap for mode calculation (most frequent number)
- Handle edge cases (empty vec should panic with clear message)
## Success criteria:
- Code compiles and runs
- Test with `vec![1, 2, 3, 3, 4, 5]` returns approximately `(3.0, 3, 3)`
## Stretch goal:
Return a struct instead of tuple for better readability
## Getting Started:
1. `cd exercises`
2. `cargo new vec-stats`
3. `cd vec-stats`
4. Implement the function in `src/main.rs` or `src/lib.rs`
5. Test with the example input
Expected time: 30-45 minutes