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  <title>Array Cardio 💪</title>
  <link rel="icon" href="https://fav.farm/🔥" />
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  <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'
    ];
    
    // Array.prototype.filter()
    // 1. Filter the list of inventors for those who were born in the 1500's
    const fifteen = inventors.filter(inventor => (inventor.year >= 1500 && inventor.year < 1600));
      //function fifteen(){
      // if(inventor.year >= 1500 && inventor.year < 1600){
      //   return true;
      // }
      //}
    console.table(fifteen);

    // Array.prototype.map()
    // 2. Give us an array of the inventors first and last names
    const fullNames = inventors.map(inventor => `${inventor.first} ${inventor.last}`);
    console.log(fullNames)

    // Array.prototype.sort()
    // 3. Sort the inventors by birthdate, oldest to youngest
    // const ordered = inventors.sort(function(firstPerson, secondPerson){
    //   if(firstPerson.year > secondPerson.year){
    //     return 1;
    //   } else {
    //     return -1;
    //   }      
    // })

    const ordered = inventors.sort((a,b) => a.year > b.year ? 1 : -1);
    console.log(ordered);



    // 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.log(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 links = [...category.querySeletorAll('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(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 transportation = data.reduce(function(obj,item){
      if(!obj[item]){
        obj[item] = 0;
      }
      obj[item]++;
      return obj;

    },{})
    console.log(transportation)



  </script>
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