JavaScript Challenges/Javascript 30/Day04/index.html

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    <title>Day 4 - Arrays</title>
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    <script>
        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: "Johanne", last: "Keppler", year: 1571, passed: 1630 },
            { first: "Nicolous", last: "Corpenicus", year: 1473, passed:  1543},
            { first: "Max", last: "Planck", year: 1858, passed: 1947},
        ];

        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'
        ];

        // filter
        // 1. Filter the list of inventors for those who were born in the 1500's
        const bornin1500 = inventors.filter( (inventor) => (inventor.year >= 1500 && inventor.year <= 1599)?true:false );
        console.table(bornin1500);  // prints in console as a table

        // map
        // 2. Give us an array of the inventors first and last names
        const fullNames = inventors.map(inventor => inventor.first + ' ' + inventor.last);
        console.table(fullNames)
        
        // sort
        // 3. Sort the inventors by birthdate, oldest to youngest
        const sorted = inventors.sort((a, b)=> a.year > b.year?1:-1 );
        console.table(sorted)

        // 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((a, b) => {
            const lastGuy = a.passed - a.year;
            const nextGuy = b.passed - b.year;
            return lastGuy > nextGuy ? 1 : -1;
        })
        console.table(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 de = links
        //             .map(link => link.textContent)
        //             .filter(streetName => streetName.includes('de'));

        
        // 7. Sort the people alphabetically by last name
        const peopleSorted = people.sort((A, B) => {
            const [alast, afirst] = A.split(', '); // split the name from ', ' into last name and first name of A
            const [blast, bfirst] = B.split(', '); 

            return alast>blast ? 1 : -1 ;
        })

        console.log(peopleSorted)


        // 8. Sum up the instances of each of these
        const data = ['car', 'car', 'truck', 'truck', 'bike', 'walk', 'car', 'van', 'bike', 'walk', 'car', 'van', 'car', 'truck', 'pogostick'];
        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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