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 }
    ];
      

    // 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));

    // 2. Give us an array of the inventor first and last names
    const fullNames = inventors.map(inventor => `${inventor.first} ${inventor.last}`);
    console.log(fullNames);

    // 3. Sort the inventors by birthdate, oldest to youngest
    const ordered = inventors.sort((a, b) => a.year > b.year ? 1 : -1);
    console.table(ordered);

    // 4. How many years did all the inventors live?
    const totalYears = inventors.reduce((total, inventor) => {
      return total + (inventor.passed - inventor.year);
    }, 0);

    // 5. Sort the inventors by years lived
    const oldest = inventors.sort(function(a, b) {
      const lastInventor = a.passed - a.year;
      const nextInventor = b.passed - b.year;
      return lastInventor > nextInventor ? -1 : 1;
    });
    console.table(oldest);
    
https://en.wikipedia.org/wiki/Category:Boulevards_in_Paris

    // 6. create a list of Boulevards in Paris that contain 'de' anywhere in the name
    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'));

    

    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'];
    

    // 7. 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);

    

    const data = ['car', 'car', 'truck', 'truck', 'bike', 'walk', 'car', 'van', 'bike', 'walk', 'car', 'van', 'car', 'truck', 'pogostick'];

     // 8. Sum up the instances of each of these
    const transportation = data.reduce(function(obj, item) {
      if (!obj[item]) {
        obj[item] = 0;
      }
      obj[item]++;
      return obj;
    }, {});
    console.log(transportation);