Merge pull request #1 from georust/point

Initial implementation of Point

src/lib.rs

@@ -1,3 +1,5 @@
+mod point;
+
 #[test]
 fn it_works() {
 }

src/point.rs

@@ -0,0 +1,24 @@
+use std::num::Float;
+
+#[derive(Clone)]
+struct Point {
+    lng: f64,
+    lat: f64,
+}
+
+impl Point {
+    pub fn distance(self, point: Point) -> f64 {
+        let lng_sqrd = (point.lng - self.lng).powi(2);
+        let lat_sqrd = (point.lat - self.lat).powi(2);
+        (lng_sqrd + lat_sqrd).sqrt()
+    }
+}
+
+#[test]
+fn test_distance() {
+    let point1 = Point {lng: 9., lat: 3.};
+    let point2 = Point {lng: 6., lat: -1.};
+    let distance = 5.;
+    assert_eq!(distance, point1.clone().distance(point2.clone()));
+    assert_eq!(distance, point2.clone().distance(point1.clone()));
+}