text: // 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 inventorsBornIn1500s = inventors.filter(inventor => inventor.year >= 1500 && inventor.year < 1600)
  console.table(inventorsBornIn1500s)
  
  // Array.prototype.map()
  // 2. Give us an array of the inventors first and last names
  const inventorFullNames = inventors.map(inventor => [inventor.first, inventor.last])
  console.table(inventorFullNames)
  
  // Array.prototype.sort()
  // 3. Sort the inventors by birthdate, oldest to youngest
  const sortedInventors = inventors.sort((inventor1, inventor2) => inventor1.year - inventor2.year)
  console.table(sortedInventors)
  
  // Array.prototype.reduce()
  // 4. How many years did all the inventors live all together?
  const yearsLived = inventors.reduce((total, inventor) => total + inventor.passed - inventor.year, 0)
  console.table(yearsLived) // original array mutated
  
  
  // 5. Sort the inventors by years lived
  inventors.forEach(inventor => inventor.yearsLived = inventor.passed - inventor.year)
  const sortedInventorsByYearsLived = inventors.sort((inventor1, inventor2) => inventor1.yearsLived - inventor2.yearsLived)
  console.table(sortedInventorsByYearsLived) // original array mutated
  
  
  // 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(content => content.includes('de'));
  
  // 7. sort Exercise
  // Sort the people alphabetically by last name
  const sortedPeople = people.sort((p1, p2) => {
      const [p1Last, p1First] = p1.split(', ');
      const [p2Last, p2First] = p2.split(', ');
      return p1Last > p2Last ? -1 : 1;
  })
  console.log(sortedPeople)
  
  // 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 instances = data.reduce((total, item) => {
      if (typeof total[item] == 'undefined') {
          total[item] = 1;
      }
      else {
          total[item] += 1;
      }
      return total;
  }, {})
  
  console.table(instances)
  