finished challenge wesbos#4

Author: cindychen5

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

@@ -37,28 +37,83 @@
 
     // Array.prototype.filter()
     // 1. Filter the list of inventors for those who were born in the 1500's
+    const fifteen = inventors.filter(function(inventor) {
+      if(inventor.year >= 1500 && inventor.year <= 1600) {
+        return true;
+      }
+    })
+    // console.table(fifteen);
+    // console.log(fifteen)
 
     // Array.prototype.map()
     // 2. Give us an array of the inventors first and last names
+    const fullName = inventors.map(inventor => inventor.first + ' ' + inventor.last)
+    // console.log(fullName)
+    // console.table(fullName);
 
     // Array.prototype.sort()
     // 3. Sort the inventors by birthdate, oldest to youngest
+  // const sortBirthDate = inventors.sort(function(a, b) {
+  //   if(a.year >b.year) {
+  //     return 1;
+  //   } else {
+  //     return -1;
+  //   }
+  // })
+
+    const sortBirthDate = inventors.sort((a, b) => a.year > b.year ? 1 : -1);
+  // console.table(sortBirthDate)
+  // console.log(sortBirthDate)
 
     // 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(function(a, b) {
+      const lastGuy = a.passed - a.year;
+      const nextGuy = b.passed - b.year;
+      return lastGuy > nextGuy ? -1 : 1;
+      // if(lastGuy > nextGuy) {
+      //   return -1;
+      // } else {
+      //   return 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'));
+
 
 
     // 7. sort Exercise
     // Sort the people alphabetically by last name
+    const alpha = people.sort((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 transportation = data.reduce(function(obj, item) {
+    if(!obj[item]) {
+      obj[item] = 0;
+    }
+    obj[item]++;
+    return obj;
+  }, {})
 
   </script>
 </body>