@@ -32,28 +32,76 @@
     // Array.prototype.filter()
     // 1. Filter the list of inventors for those who were born in the 1500's
 
+    const result = inventors.filter((elem) => elem.year >= 1500 && elem.year < 1600);
+    console.table(result);
+
     // Array.prototype.map()
     // 2. Give us an array of the inventors' first and last names
 
+    const names = inventors.map((elem) => elem.first + ' ' + elem.last);
+    console.table(names);
+
     // Array.prototype.sort()
     // 3. Sort the inventors by birthdate, oldest to youngest
+    inventors.sort((a, b) => (a.year > b.year) ? 1 : -1);
+    console.table(inventors);
 
     // Array.prototype.reduce()
     // 4. How many years did all the inventors live?
 
+    const totalYears = inventors.reduce(((sum, currentValue) => {
+      return sum + currentValue.passed - currentValue.year;
+    }), 0);
+    console.log(totalYears);
+
     // 5. Sort the inventors by years lived
 
+    const yearsLived = inventors.sort((a, b) => (a.passed - a.year < b.passed - b.year ? 1 : -1));
+    console.table(yearsLived);
+
     // 6. create a list of Boulevards in Paris that contain 'de' anywhere in the name
     // https://en.wikipedia.org/wiki/Category:Boulevards_in_Paris
 
+    // const category = document.querySelector('.mw-category');
+    // const links = category.querySelectorAll('a');
+    // let res = [];
+    // links.forEach((item) => {
+    //   // console.log(typeof item.title)
+    //   if (/de/i.test(item.title)) {
+    //     res.push(item.title);
+    //   }
+    // });
+    // console.log(res);
+    // // console.log(links);
+
 
     // 7. sort Exercise
     // Sort the people alphabetically by last name
+    lastNameSorted = people.sort((a, b) => {
+      const surnameA = a.split(',');
+      const surnameB = b.split(',');
+      return surnameA > surnameB ? 1 : -1;
+    });
+    console.table(lastNameSorted);
+
 
     // 8. Reduce Exercise
     // Sum up the instances of each of these
     const data = ['car', 'car', 'truck', 'truck', 'bike', 'walk', 'car', 'van', 'bike', 'walk', 'car', 'van', 'car', 'truck' ];
 
+    const dataRes = data.reduce(function(obj, item) {
+      // console.log(item);
+      if (!obj[item]) {
+        obj[item] = 0;
+      }
+      obj[item]++;
+      return obj;
+
+    }, {});
+    console.log(dataRes);
+
+
+
   </script>
 </body>
 </html>