adding files for day4 challenge

karun2001 · Sep 21, 2023 · e9306ee · e9306ee
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>Array Cardio 💪</title>
+  <link rel="icon" href="https://fav.farm/🔥" />
+</head>
+<body>
+  <p><em>Psst: have a look at the JavaScript Console</em> 💁</p>
+  <script>
+    // Get your shorts on - this is an array workout!
+    // ## Array Cardio Day 1
+
+    // Some data we can work with
+
+    const inventors = [
+      { first: 'Albert', last: 'Einstein', year: 1879, passed: 1955 },
+      { first: 'Isaac', last: 'Newton', year: 1643, passed: 1727 },
+      { first: 'Galileo', last: 'Galilei', year: 1564, passed: 1642 },
+      { first: 'Marie', last: 'Curie', year: 1867, passed: 1934 },
+      { first: 'Johannes', last: 'Kepler', year: 1571, passed: 1630 },
+      { first: 'Nicolaus', last: 'Copernicus', year: 1473, passed: 1543 },
+      { first: 'Max', last: 'Planck', year: 1858, passed: 1947 },
+      { first: 'Katherine', last: 'Blodgett', year: 1898, passed: 1979 },
+      { first: 'Ada', last: 'Lovelace', year: 1815, passed: 1852 },
+      { first: 'Sarah E.', last: 'Goode', year: 1855, passed: 1905 },
+      { first: 'Lise', last: 'Meitner', year: 1878, passed: 1968 },
+      { first: 'Hanna', last: 'Hammarström', year: 1829, passed: 1909 }
+    ];
+
+    const people = [
+      'Bernhard, Sandra', 'Bethea, Erin', 'Becker, Carl', 'Bentsen, Lloyd', 'Beckett, Samuel', 'Blake, William', 'Berger, Ric', 'Beddoes, Mick', 'Beethoven, Ludwig',
+      'Belloc, Hilaire', 'Begin, Menachem', 'Bellow, Saul', 'Benchley, Robert', 'Blair, Robert', 'Benenson, Peter', 'Benjamin, Walter', 'Berlin, Irving',
+      'Benn, Tony', 'Benson, Leana', 'Bent, Silas', 'Berle, Milton', 'Berry, Halle', 'Biko, Steve', 'Beck, Glenn', 'Bergman, Ingmar', 'Black, Elk', 'Berio, Luciano',
+      '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'
+    ];
+
+    // 
+    // 1. Filter the list of inventors for those who were born in the 1500's
+    const filtered_inventors = inventors.filter(obj => (obj.year <= 1600)&&(obj.year>=1500) );
+    console.log(filtered_inventors);
+
+    // Array.prototype.map()
+    // 2. Give us an array of the inventors first and last names
+    const mapped_fullname = inventors.map(obj => {
+        return [obj.first, obj.last];
+    });
+    console.log(mapped_fullname);
+
+    // Array.prototype.sort()
+    // 3. Sort the inventors by birthdate, oldest to youngest
+      const inventors_bydate_sorted = (inventors.map(obj => obj.year)).sort(function (a,b) {
+          return a-b;
+      });
+      console.log(inventors_bydate_sorted);
+    // Array.prototype.reduce()
+    // 4. How many years did all the inventors live all together?
+      const total_years = inventors.reduce((acc, obj)=> acc+ (obj.passed-obj.year+1),0);
+      console.log(total_years);
+    // 5. Sort the inventors by years lived
+      const inventors_sort_by_years_lived = inventors.sort ((obj1,obj2) => {
+        return (obj1.passed-obj1.year)-(obj2.passed-obj2.year);
+      })
+      console.log(inventors_sort_by_years_lived);
+    // 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('.mwcategory');
+    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
+    newArray = people.sort(function(a, b){
+    return (a==b? 0 : (a<b)?-1 : 1);
+});
+console.log(newArray);
+
+    // 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, element){
+        if(!obj[element]){
+            obj[element] = 0;
+        }
+        obj[element]++;
+        return obj;
+    },{});
+    console.log(transportation);
+  </script>
+</body>
+</html>