add answer to some quiz

Author: dzarrr

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

@@ -31,24 +31,84 @@
 
     // Array.prototype.filter()
     // 1. Filter the list of inventors for those who were born in the 1500's
+    console.log('#1. Filter');
+    console.log(
+      inventors.filter( inventor => {
+        return (inventor.year >= 1500 && inventor.year < 1600);
+      })
+    );
 
     // Array.prototype.map()
     // 2. Give us an array of the inventors first and last names
+    console.log('#2. Map');
+    console.log(
+      inventors.map( inventor => { 
+        return { 
+          first: inventor.first, 
+          last: inventor.last
+        }
+      })
+    );
 
     // Array.prototype.sort()
     // 3. Sort the inventors by birthdate, oldest to youngest
+    console.log('#3. Sort');
+    console.log(
+      inventors.sort( (a, b) => {
+        if (a.year > b.year) {
+          return 1;
+        } else if (a.year < b.year) {
+          return -1;
+        } else {
+          return 0;
+        }
+      })
+    );
 
     // Array.prototype.reduce()
     // 4. How many years did all the inventors live all together?
+    console.log('#4. Reduce');
+    console.log(
+      inventors.reduce((sum, inventor) => {
+        console.log(sum, inventor);
+        return (sum + (inventor.passed - inventor.year));
+      }, 0)
+    )
 
     // 5. Sort the inventors by years lived
+    console.log('#5. Sort 2');
+    console.log(
+      inventors.sort( (a, b) => {
+        if ((a.passed - a.year) > (b.passed - b.year)) {
+          return 1;
+        } else if ((a.passed - a.year) < (b.passed - b.year)) {
+          return -1;
+        } else {
+          return 0;
+        }
+      })
+    )
 
     // 6. create a list of Boulevards in Paris that contain 'de' anywhere in the name
     // https://en.wikipedia.org/wiki/Category:Boulevards_in_Paris
 
 
     // 7. sort Exercise
     // Sort the people alphabetically by last name
+    console.log('#7. Sort Last Name');
+    console.log(
+      people.sort((a, b) => {
+        let a_lastName = a.split(', ')[1];
+        let b_lastName = b.split(', ')[1];
+        if (a_lastName > b_lastName) {
+          return 1;
+        } else if (a_lastName < b_lastName) {
+          return -1;
+        } else {
+          return 0;
+        }
+      })
+    );
 
     // 8. Reduce Exercise
     // Sum up the instances of each of these