7 - Array cardio day 1/index.html

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<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Array Cardio 💪</title>
</head>
<body>
  <p><em>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 = ['Beck, Glenn', 'Becker, Carl', 'Beckett, Samuel', 'Beddoes, Mick', 'Beecher, Henry', 'Beethoven, Ludwig', 'Begin, Menachem', 'Belloc, Hilaire', 'Bellow, Saul', 'Benchley, Robert', 'Benenson, Peter', 'Ben-Gurion, David', 'Benjamin, Walter', 'Benn, Tony', 'Bennington, Chester', 'Benson, Leana', 'Bent, Silas', 'Bentsen, Lloyd', 'Berger, Ric', 'Bergman, Ingmar', 'Berio, Luciano', 'Berle, Milton', 'Berlin, Irving', 'Berne, Eric', 'Bernhard, Sandra', 'Berra, Yogi', 'Berry, Halle', 'Berry, Wendell', 'Bethea, Erin', 'Bevan, Aneurin', 'Bevel, Ken', 'Biden, Joseph', 'Bierce, Ambrose', 'Biko, Steve', 'Billings, Josh', 'Biondo, Frank', 'Birrell, Augustine', 'Black, Elk', 'Blair, Robert', 'Blair, Tony', 'Blake, William'];
  
    // Array.prototype.filter()
    // 1. Filter the list of inventors for those who were born in the 1500's
      const result = inventors.filter(inventor=>inventor.year<1600 && inventor.year>1500);
      console.log("Born in 1500s");
      console.table(result);
  
    // Array.prototype.map()
    // 2. Give us an array of the inventors' first and last names
      const names = inventors.map(inventor=>{
          return {firstName : inventor.first, lastName : inventor.last}
      });
      console.log("first and last names ");
      console.table(names);
      
      
    // Array.prototype.sort()
    // 3. Sort the inventors by birthdate, oldest to youngest
      const sortedBirthDate = inventors.sort(function(a, b){
    return a.year>b.year ? 1:-1;
});
      console.log("Sorted by Birth Date ");
      console.table(sortedBirthDate);
     
      
    // Array.prototype.reduce()
    // 4. How many years did all the inventors live?
      const ages = inventors.reduce((total,inventor)=>total+(inventor.passed-inventor.year),0);
      console.log(`Total age ${ages}`);
      

    // 5. Sort the inventors by years lived
      const yearsLived = inventors.sort(function(a,b)
                                       {
          let lastGuy = a.passed-a.year;
          let nextGuy = b.passed-b.year;
          
          if(lastGuy>nextGuy)  return -1;
          else return 1;
          
      });
      console.log("Years Lived");
      console.table(yearsLived);

    // 6. create a list of Boulevards in Paris that contain 'de' anywhere in the name
    // https://en.wikipedia.org/wiki/Category:Boulevards_in_Paris
      
     /* On the wikepedia console
     
     
     const div = document.querySelector('.mw-category');
      const as = Array.from(div.querySelectorAll('a')); //converting node list to a map
      const des = as.map(el=>el.textContent).filter(el=>el.includes('de'));
 */


    // 7. sort Exercise
    // Sort the people alphabetically by last name
      const sortpeople = people.sort(function(a,b)
    {
          let [afirst,alast] = a.split(', ');
          let [bfirst,blast] = b.split(', ');
          return alast > blast?1:-1;
          
      });
      
      console.log("Sorted by last name");
      console.table(sortpeople);

    // 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 num = data.reduce((obj,item)=>
    {
          if(!obj[item]) obj[item]=0;
          obj[item]++;
          return obj;
      },{});
      
      console.log("Number of vehicles");
      console.table(num);
  </script>
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