Day 4 - Array Cardio Part 1

Ugly page just to make some excercises on Array methods and functions.

Open the console to see the results.

Input

      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'];

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

1. Filter the list of inventors for those who were born in the 1500's

      const result = inventors.filter(inventor => inventor.year >= 1500 && inventor.year < 1600);
    

2. Give us an array of the inventors' first and last names

      const result = inventors.map(inventor => `${inventor.first} ${inventor.last}`);
    

3. Sort the inventors by birthdate, oldest to youngest

      const result = inventors.sort((a, b) => a.year - b.year);
    

4. How many years did all the inventors live?

      const result = inventors.reduce((total, inventor) => total + inventor.passed - inventor.year, 0);
    

5. Sort the inventors by years lived

      const result = inventors.sort((a, b) => (a.passed - a.year) - (b.passed - b.year));
    

6. Sort the people alphabetically by last name

      const result = people.sort((a, b) => a.split(',').shift().trim() > b.split(',').shift().trim());
    

7. Sum up the instances of each of the elements in data

      const result = data.reduce((total, item) => {
        if (total[item]) {
          total[item]++;
        } else {
          total[item] = 1;
        }
        return total;
      }, {});