2016 Update

Task/Averages-Simple-moving-average/Rust/averages-simple-moving-average-1.rust

@@ -0,0 +1,39 @@
+struct SimpleMovingAverage {
+    period: usize,
+    numbers: Vec<usize>
+}
+
+impl SimpleMovingAverage {
+    fn new(p: usize) -> SimpleMovingAverage {
+        SimpleMovingAverage {
+            period: p,
+            numbers: Vec::new()
+        }
+    }
+
+    fn add_number(&mut self, number: usize) -> f64 {
+        self.numbers.push(number);
+
+        if self.numbers.len() > self.period {
+            self.numbers.remove(0);
+        }
+
+        if self.numbers.is_empty() {
+            return 0f64;
+        }else {
+            let sum = self.numbers.iter().fold(0, |acc, x| acc+x);
+            return sum as f64 / self.numbers.len() as f64;
+        }
+    }
+}
+
+fn main() {
+    for period in [3, 5].iter() {
+        println!("Moving average with period {}", period);
+
+        let mut sma = SimpleMovingAverage::new(*period);
+        for i in [1, 2, 3, 4, 5, 5, 4, 3, 2, 1].iter() {
+            println!("Number: {} | Average: {}", i, sma.add_number(*i));
+        }
+    }
+}

Task/Averages-Simple-moving-average/Rust/averages-simple-moving-average-2.rust

@@ -0,0 +1,41 @@
+use std::collections::VecDeque;
+
+struct SimpleMovingAverage {
+    period: usize,
+    numbers: VecDeque<usize>
+}
+
+impl SimpleMovingAverage {
+    fn new(p: usize) -> SimpleMovingAverage {
+        SimpleMovingAverage {
+            period: p,
+            numbers: VecDeque::new()
+        }
+    }
+
+    fn add_number(&mut self, number: usize) -> f64 {
+        self.numbers.push_back(number);
+
+        if self.numbers.len() > self.period {
+            self.numbers.pop_front();
+        }
+
+        if self.numbers.is_empty() {
+            return 0f64;
+        }else {
+            let sum = self.numbers.iter().fold(0, |acc, x| acc+x);
+            return sum as f64 / self.numbers.len() as f64;
+        }
+    }
+}
+
+fn main() {
+    for period in [3, 5].iter() {
+        println!("Moving average with period {}", period);
+
+        let mut sma = SimpleMovingAverage::new(*period);
+        for i in [1, 2, 3, 4, 5, 5, 4, 3, 2, 1].iter() {
+            println!("Number: {} | Average: {}", i, sma.add_number(*i));
+        }
+    }
+}