Added solution 4.

Author: anirampling

04 - Array Cardio Day 1/index-START.html

@@ -46,16 +46,21 @@
 
     const firstLast = inventors.map( inventors => `${inventors.first} ${inventors.last}` )
 
-    console.log(firstLast)
+    // console.log(firstLast)
 
     // Array.prototype.sort()
     // 3. Sort the inventors by birthdate, oldest to youngest
     const oldestToYoungest = inventors.sort((a, b) => a.year - b.year)
 
-    console.log(oldestToYoungest)
+    // console.log(oldestToYoungest)
 
     // Array.prototype.reduce()
     // 4. How many years did all the inventors live all together?
+  const yearsLived = inventors.reduce((total, inventor ) => {
+    return total + inventor.passed - inventor.year
+  }, 0 )
+
+    console.log(yearsLived)
 
     // 5. Sort the inventors by years lived