js-30 array cardio day 4

arrayCardio.js

    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 oldPeeps = inventors.filter(function(inventor){
       return inventor.year >= 1500 && inventor.year < 1600
    });

    // console.table(oldPeeps)


    // Array.prototype.map()
    // 2. Give us an array of the inventors' first and last names
    const inventorNames = inventors.map((inventor) => {
      return inventor.first + " " + inventor.last
    })

    // console.log(inventorNames)


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

    // console.table(inventorAges)

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

    // console.log(inventorTotalAge);

    // 5. Sort the inventors by years lived
    const inventorAgeSort = inventors.sort((a, b) => {
      const youngerInventor = a.passed - a.year;
      const olderInventor = a.passed - a.year;
      return youngerInventor > olderInventor ? -1 : 1;

    });

    // console.table(inventorAgeSort);

    // 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 lastNameSort = people.sort((lastName, firstName) =>{
      const [aLast, aFirst] = lastName.split(', ');
      const [bLast, bFirst] = firstName.split(', ');
      return aLast > bLast ? 1 : -1;
    });
    // console.log(lastNameSort);

    // 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 vehicles = data.reduce((obj, item) => {
      if(!obj[item]) {
        obj[item] = 0;
      }
      obj[item]++;
      return obj;
    }, {});
    console.log(vehicles)