Day 4 done

Author: johnw86

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

@@ -31,28 +31,73 @@
 
     // Array.prototype.filter()
     // 1. Filter the list of inventors for those who were born in the 1500's
+    const fifteen = inventors.filter(function(i){
+      return i.year >= 1500 && i.year < 1600;
+    });
+
+    // Can be written as
+    //const fifteen = inventors.filter(i => i.year >= 1500 && i.year < 1600);
+    console.table(fifteen);
 
     // Array.prototype.map()
     // 2. Give us an array of the inventors' first and last names
+    const fullNames = inventors.map(i => `${i.first} ${i.last}`);
+    console.log(fullNames);
 
     // Array.prototype.sort()
     // 3. Sort the inventors by birthdate, oldest to youngest
+    // const ordered = inventors.sort(function(a, b){
+    //   return a.year - b.year;
+    // });
+
+    const ordered = inventors.sort((a, b) => a.year > b.year ? 1 : -1);
+    console.table(ordered);
 
     // Array.prototype.reduce()
     // 4. How many years did all the inventors live?
+    const totalYears = inventors.reduce((total, inventor) => {
+      return total + (inventor.passed - inventor.year);
+    }, 0);
+    console.log(totalYears);
 
     // 5. Sort the inventors by years lived
+    const sortedByYearsLived = inventors.sort(function(a, b){
+        const lastGuy = a.passed - a.year;
+        const nextGuy = b.passed - b.year;
+      return lastGuy > nextGuy ? -1 : 1;
+    });
+    console.table(sortedByYearsLived);
 
     // 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 = 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((a, b) => {
+      const [aLast, aFirst] = a.split(', ');
+      const [bLast, bFirst] = b.split(', ');
+
+      return aLast > bLast ? 1 : -1;
+    });
+    console.log(alpha);
 
     // 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(function(obj, item){
+      if(!obj[item]){
+        obj[item] = 0;
+      }
+      obj[item]++;
+      return obj;
+    }, {});
+    console.log(transportation);
 
   </script>
 </body>