Adds Day 4 Finished Code.

Author: rob5standingby

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

@@ -33,29 +33,53 @@
 
     // Array.prototype.filter()
     // 1. Filter the list of inventors for those who were born in the 1500's
+    const fifteen = inventors.filter(inventor => inventor.year >= 1500 && inventor.year < 1600);
 
     // Array.prototype.map()
     // 2. Give us an array of the inventors' first and last names
+    const fullNames = inventors.map(inventor => `${inventor.first} ${inventor.last}`);
 
     // Array.prototype.sort()
     // 3. Sort the inventors by birthdate, oldest to youngest
+    const sortedByBirthDate = inventors.sort((a, b) => a.year > b.year ? 1 : -1);
 
     // Array.prototype.reduce()
     // 4. How many years did all the inventors live?
+    const totalYears = inventors.reduce((total, inventor) => total + (inventor.passed - inventor.year), 0);
 
     // 5. Sort the inventors by years lived
+    const oldest = inventors.sort((a, b) => {
+      const lastGuy = a.passed - a.year;
+      const nextGuy = b.passed - b.year;
+      return lastGuy > nextGuy ? -1 : 1;
+    });
 
     // 6. create a list of Boulevards in Paris that contain 'de' anywhere in the name
     // https://en.wikipedia.org/wiki/Category:Boulevards_in_Paris
-
+    // Note: Run this code below on the wikipedia page...
+    // const category = document.querySelector('.mw-category');
+    // const links = Array.from(category.querySelectorAll('a'));
+    // const de = links
+    //   .map(link => link.textContent)
+    //   .filter(streetName => streetName.includes('de'));
 
     // 7. sort Exercise
     // Sort the people alphabetically by last name
+    const alpha = people.sort((lastOne, nextOne) => {
+      const [aLast, aFirst] = lastOne.split(', ');
+      const [bLast, bFirst] = nextOne.split(', ');
+      return aLast > bLast ? 1 : -1;
+    });
 
     // 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 transportation = data.reduce((result, vehicle) => {
+      result[vehicle] = result[vehicle] || 0;
+      result[vehicle] += 1;
+      return result;
+    }, {});
+    console.log(transportation);
   </script>
 </body>
 </html>