invert test and implement

Author: mandipsanger

Sprint-2/interpret/invert.js

@@ -10,20 +10,36 @@ function invert(obj) {
   const invertedObj = {};
 
   for (const [key, value] of Object.entries(obj)) {
-    invertedObj.key = value;
+    invertedObj[value] = key;
   }
 
   return invertedObj;
 }
 
+module.exports = invert;
+
 // a) What is the current return value when invert is called with { a : 1 }
+// { key: 1 }
 
 // b) What is the current return value when invert is called with { a: 1, b: 2 }
+//{ key: 2 }
 
 // c) What is the target return value when invert is called with {a : 1, b: 2}
+//{
+// 1: "a",
+// 2: "b"
+//}
 
 // c) What does Object.entries return? Why is it needed in this program?
+//
+//[
+// ["a", 1],
+//["b", 2]
+//]
 
 // d) Explain why the current return value is different from the target output
+//invertedObj.key = value; means "create a property named key".
+//It does not mean "use the variable key as the property name."
+//invertedObj[value] = key; Square brackets allow the variable's value to become the property name.
 
 // e) Fix the implementation of invert (and write tests to prove it's fixed!)