JS#30 wesbos#4 completed

= · = · commit 960629037721 · 2021-06-25T23:21:36.000+05:30
diff --git a/04 - Array Cardio Day 1/index-START.html b/04 - Array Cardio Day 1/index-START.html
@@ -1,9 +1,11 @@
 <!DOCTYPE html>
 <html lang="en">
+
 <head>
   <meta charset="UTF-8">
   <title>Array Cardio 💪</title>
 </head>
+
 <body>
   <p><em>Psst: have a look at the JavaScript Console</em> 💁</p>
   <script>
@@ -34,32 +36,69 @@
       'Berne, Eric', 'Berra, Yogi', 'Berry, Wendell', 'Bevan, Aneurin', 'Ben-Gurion, David', 'Bevel, Ken', 'Biden, Joseph', 'Bennington, Chester', 'Bierce, Ambrose',
       'Billings, Josh', 'Birrell, Augustine', 'Blair, Tony', 'Beecher, Henry', 'Biondo, Frank'
     ];
-    
+
     // Array.prototype.filter()
     // 1. Filter the list of inventors for those who were born in the 1500's
+    //filter returns the only results where the condition is satisfied
+    console.table(inventors.filter(inventor => inventor.year >= 1500 && inventor.year <= 1599))
 
     // Array.prototype.map()
     // 2. Give us an array of the inventors first and last names
+    // map returns the array equal to the size of the parent array
+    console.log(inventors.map(inventor => `${inventor.first} ${inventor.last}`))
 
-    // Array.prototype.sort()
+    // Array.prot otype.sort()
     // 3. Sort the inventors by birthdate, oldest to youngest
+    console.table(inventors.sort((a, b) => a.year > b.year ? 1 : -1));
 
     // Array.prototype.reduce()
     // 4. How many years did all the inventors live all together?
+    const totalYears = inventors.reduce((total, inventor) => {
+      return total + (inventor.passed - inventor.year);
+    }, 0);
+    console.log(totalYears);
 
     // 5. Sort the inventors by years lived
+    const oldest = inventors.sort((a,b)=>{
+      const A = a.passed - a.year;
+      const B = b.passed - b.year;
+      return A > B ? -1 : 1;
+    })
+    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 category = document.querySelector('.mw-category');
+    // const links = Array.from(category.querySelectorAll('a'));
+    // const de = links
+    //            .map(link => link.textContent)
+    //            .filter(streetName => streetName.includes("de"));
+    // console.log(de);
 
     // 7. sort Exercise
     // Sort the people alphabetically by last name
+    const alpha = people.sort(function(lastOne,nextOne){
+      const [aLast,aFirst] = lastOne.split(', ');
+      const [bLast,bFirst] = nextOne.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 data = ['car', 'car', 'truck', 'truck', 'bike', 'walk', 'car', 'van', 'bike', 'walk', 'car', 'van', 'car', 'truck'];
+
+    const transportation = data.reduce((obj,item) => {
+      if(!obj[item]){
+        obj[item] = 0;
+      }
+      obj[item]++;
+      return obj;
+    },{});
+
+    console.log(transportation);
 
   </script>
 </body>
-</html>
+
+</html>
