Adding latest

.gitignore

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+/target

Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "exercises"
+version = "0.1.0"

Cargo.toml

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+[package]
+name = "exercises"
+version = "0.1.0"
+authors = ["Daniel Tomlinson <dtomlinson@panaetius.co.uk>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

src/main.rs

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+mod stats;
+
+fn main() {
+    // Stats
+    let mut numbers = stats::StatsCalculator::default_data();
+    println!("Data: {:?}", numbers);
+    println!("Mean: {:?}", numbers.get_mean());
+    println!("Median: {:?}", numbers.get_median());
+}

src/stats.rs

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+use std::convert::TryFrom;
+
+#[derive(Debug)]
+pub struct StatsCalculator {
+    data: Vec<i32>,
+}
+
+impl StatsCalculator {
+    pub fn default_data() -> Self {
+        Self::from_vec(vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10])
+    }
+
+    pub fn from_vec(initial_data: Vec<i32>) -> Self {
+        return StatsCalculator { data: initial_data };
+    }
+
+    // pub fn initialise(&mut self) -> () {
+    //     self.total = self.data.iter().sum();
+    //     let length = i32::try_from(self.data.len());
+    //     // self.length = match length {
+    //     //     Ok(i) => i,
+    //     //     _ => 0,
+    //     // };
+    //     if let Ok(i) = length {
+    //         self.length = i;
+    //     } else {
+    //         self.length = 0;
+    //     }
+    // }
+
+    fn get_length(&self) -> i32 {
+        let length = i32::try_from(self.data.len());
+
+        if let Ok(i) = length {
+            return i;
+        } else {
+            return 0;
+        }
+    }
+
+    fn get_total(&self) -> i32 {
+        return self.data.iter().sum();
+    }
+
+    pub fn get_mean(&self) -> f32 {
+        let total = self.get_total();
+        let length = self.get_length();
+        return total as f32 / length as f32;
+    }
+
+    pub fn get_median(&mut self) -> f32 {
+        let length = self.get_length();
+        let mid = length as usize / 2;
+
+        self.data.sort();
+
+        if length % 2 != 0 {
+            return self.data[mid] as f32;
+        } else {
+            return (self.data[mid - 1] as f32 + self.data[mid] as f32) / 2.0;
+        }
+    }
+}