[ADD] Map the debris added

luisprooc · luisprooc · commit 0bf834a55879 · 2021-07-21T10:47:10.000-04:00
diff --git a/README.md b/README.md
@@ -764,4 +764,25 @@ spinalCase("Teletubbies say Eh-oh") should return the string teletubbies-say-eh-
 
 spinalCase("AllThe-small Things") should return the string all-the-small-things.
 
+```
+
+
+## Map the Debris
+
+Return a new array that transforms the elements' average altitude into their orbital periods (in seconds).
+
+The array will contain objects in the format {name: 'name', avgAlt: avgAlt}.
+
+You can read about orbital periods on Wikipedia.
+
+The values should be rounded to the nearest whole number. The body being orbited is Earth.
+
+The radius of the earth is 6367.4447 kilometers, and the GM value of earth is 398600.4418 km3s-2.
+
+
+```javascript
+orbitalPeriod([{name : "sputnik", avgAlt : 35873.5553}]) should return [{name: "sputnik", orbitalPeriod: 86400}].
+
+orbitalPeriod([{name: "iss", avgAlt: 413.6}, {name: "hubble", avgAlt: 556.7}, {name: "moon", avgAlt: 378632.553}]) should return [{name : "iss", orbitalPeriod: 5557}, {name: "hubble", orbitalPeriod: 5734}, {name: "moon", orbitalPeriod: 2377399}].
+
 ```
diff --git a/src/mapDebris.js b/src/mapDebris.js
@@ -0,0 +1,11 @@
+function orbitalPeriod(arr) {
+    var GM = 398600.4418;
+    var earthRadius = 6367.4447;
+    const a = 2 * Math.PI;
+    let newArr = arr.map(item => {
+      return {name: item.name, orbitalPeriod: Math.round(Math.sqrt(Math.pow(earthRadius + item.avgAlt,3)/GM) * a)}
+    });
+    return newArr;
+}
+  
+console.log(orbitalPeriod([{name : "sputnik", avgAlt : 35873.5553}]));
