Finished video 4

rottgoth · rottgoth · commit 37560e4d17fd · 2017-02-17T19:57:13.000-08:00
diff --git a/04 - Array Cardio Day 1/index-START.html b/04 - Array Cardio Day 1/index-START.html
@@ -27,29 +27,62 @@
 
     // Array.prototype.filter()
     // 1. Filter the list of inventors for those who were born in the 1500's
+    console.table(inventors.filter(inventor => inventor.year > 1500 && inventor.year < 1600));
 
     // Array.prototype.map()
     // 2. Give us an array of the inventory first and last names
+    console.log(inventors.map(({first, last}) => `${first} ${last}`));
 
     // Array.prototype.sort()
     // 3. Sort the inventors by birthdate, oldest to youngest
+    console.table(inventors.sort((x, y) => x.year > y.year ? 1 : -1));
 
     // Array.prototype.reduce()
     // 4. How many years did all the inventors live?
+    console.log(inventors.reduce(((acc, {year, passed}) => acc += (passed - year)), 0));
 
     // 5. Sort the inventors by years lived
+    console.table(inventors.sort((a,b) => {
+      const yearsA = a.passed - a.year;
+      const yearsB = b.passed - b.year;
+      return yearsA > yearsB ? -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
+    // const category = document.querySelector('.mw-category');
+    // // const links = [...category.querySelectorAll('a')];
+    // const links = Array.from(category.querySelectorAll('a'));
+    // const de = links
+    //              .map((link) => link.textContent)
+    //              // .filter((text) => text.match(/de/));
+    //              .filter((text) => text.includes('de'));
+    // console.log(de);
 
 
     // 7. sort Exercise
     // Sort the people alphabetically by last name
+    const alpha = people.sort((a, b) => {
+      const [aLast, aFirst] = a.split(', ');
+      const [bLast, bFirst] = b.split(', ');
+      return aLast > bLast ? 1 : -1;
+    });
+    console.log(alpha);
+    // this doesn't return the whole name:
+    // const lastNames = people.map((name) => name.split(',')[0]);
+    // console.log(lastNames.sort());
 
     // 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 dataSum = data.reduce((acc, item) => {
+      if (!acc[item]) {
+        acc[item] = 0;
+      }
+      acc[item]++;
+      return acc;
+    }, {});
+    console.log(dataSum);
   </script>
 </body>
 </html>
