Day 4

oddlyfunctional · oddlyfunctional · commit a0e78d237216 · 2016-12-16T14:48:21.000-02:00
diff --git a/04 - Array Cardio Day 1/index-START.html b/04 - Array Cardio Day 1/index-START.html
@@ -33,29 +33,60 @@
 
     // Array.prototype.filter()
     // 1. Filter the list of inventors for those who were born in the 1500's
+    const inventorsFromThe1500s = inventors.filter(inventor => inventor.year >= 1500 && inventor.year <= 1599)
+    console.table(inventorsFromThe1500s);
 
     // Array.prototype.map()
     // 2. Give us an array of the inventors' first and last names
+    const fullNames = inventors.map(inventor => `${inventor.first} ${inventor.last}`)
+    console.table(fullNames);
 
     // Array.prototype.sort()
     // 3. Sort the inventors by birthdate, oldest to youngest
+    const sorted = [].concat(inventors).sort((a, b) => b.year - a.year);
+    console.table(sorted);
 
     // Array.prototype.reduce()
     // 4. How many years did all the inventors live?
+    const totalYearsOfScience = inventors.reduce((sum, inventor) => sum + lived(inventor), 0)
+    console.log(totalYearsOfScience);
 
     // 5. Sort the inventors by years lived
+    const oldest = [].concat(inventors).sort((a, b) => lived(b) - lived(a));
+    console.table(oldest);
 
     // 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 boulevardsWithDe = Array.prototype.map.call(
+      document.querySelectorAll('.mw-category li a'),
+      anchor => anchor.textContent
+    ).filter(boulevard => boulevard.indexOf('de') !== -1);
 
     // 7. sort Exercise
     // Sort the people alphabetically by last name
+    const alphabeticallyOrdered = [].concat(people).sort((a, b) => lastName(a) > lastName(b) ? 1 : -1);
+    console.log(alphabeticallyOrdered);
 
     // 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 countsOfVehicles = data.reduce(
+      (hash, vehicle) => {
+        hash[vehicle] = (hash[vehicle] || 0) + 1;
+        return hash;
+      },
+      {}
+    );
+    console.log(countsOfVehicles);
+
+    function lived(inventor) {
+      return inventor.passed - inventor.year;
+    }
 
+    function lastName(fullName) {
+      const [_, last] = fullName.split(', ');
+      return last;
+    }
   </script>
 </body>
 </html>
