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| 1 | +const q1 = document.querySelector('.q1'); |
| 2 | +const q2 = document.querySelector('.q2'); |
| 3 | +const q3 = document.querySelector('.q3'); |
| 4 | +const q4 = document.querySelector('.q4'); |
| 5 | +const q5 = document.querySelector('.q5'); |
| 6 | +const q6 = document.querySelector('.q6'); |
| 7 | +const q7 = document.querySelector('.q7'); |
| 8 | +const q8 = document.querySelector('.q8'); |
| 9 | +// Get your shorts on - this is an array workout! |
| 10 | +// ## Array Cardio Day 1 |
| 11 | + |
| 12 | +// Some data we can work with |
| 13 | +const inventors = [ |
| 14 | + { first: '🐣', last: '🐣🐣🐣🐣🐣🐣🐣🐣🐣🐣🐣', year: 1879, passed: 1955 }, |
| 15 | + { first: '🐤', last: '🐤🐤🐤🐤', year: 1643, passed: 1727 }, |
| 16 | + { first: '🐔', last: '🐔🐔', year: 1564, passed: 1642 }, |
| 17 | + { first: '🐥', last: '🐥🐥🐥🐥🐥🐥🐥🐥🐥', year: 1867, passed: 1934 }, |
| 18 | + { first: '🐓', last: '🐓🐓🐓', year: 1571, passed: 1630 }, |
| 19 | + { first: '🐔', last: '🐔', year: 1473, passed: 1543 }, |
| 20 | + { first: '🐥', last: '🐥🐥🐥🐥🐥🐥🐥🐥', year: 1858, passed: 1947 }, |
| 21 | + { first: '🐣', last: '🐣🐣🐣🐣🐣🐣🐣🐣🐣🐣🐣🐣', year: 1898, passed: 1979 }, |
| 22 | + { first: '🐤', last: '🐤🐤🐤🐤🐤', year: 1815, passed: 1852 }, |
| 23 | + { first: '🐥', last: '🐥🐥🐥🐥🐥🐥🐥', year: 1855, passed: 1905 }, |
| 24 | + { first: '🐣', last: '🐣🐣🐣🐣🐣🐣🐣🐣🐣🐣', year: 1878, passed: 1968 }, |
| 25 | + { first: '🐤', last: '🐤🐤🐤🐤🐤🐤', year: 1829, passed: 1909 } |
| 26 | +]; |
| 27 | + |
| 28 | +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']; |
| 29 | + |
| 30 | +// Array.prototype.filter() |
| 31 | +// 1. Filter the list of inventors for those who were born in the 1500's |
| 32 | +const fifteen = inventors.filter(inventor => inventor.year >= 1500 && inventor.year < 1600); |
| 33 | +console.table(fifteen); |
| 34 | +q1.innerHTML = JSON.stringify(fifteen); |
| 35 | + |
| 36 | +// Array.prototype.map() |
| 37 | +// 2. Give us an array of the inventors first and last names |
| 38 | +const name = inventors.map(inventor => `${inventor.first} ${inventor.last}`); |
| 39 | +console.table(name); |
| 40 | +q2.innerHTML = name; |
| 41 | + |
| 42 | +// Array.prototype.sort() |
| 43 | +// 3. Sort the inventors by birthdate, oldest to youngest |
| 44 | +const sort = inventors.sort((a, b) => a.year > b.year ? 1 : -1); |
| 45 | +console.table(sort); |
| 46 | +q3.innerHTML = JSON.stringify(sort); |
| 47 | + |
| 48 | +// Array.prototype.reduce() |
| 49 | +// 4. How many years did all the inventors live all together? |
| 50 | +const reduce = inventors.reduce((total, inventor) => total + (inventor.passed - inventor.year), 0); |
| 51 | +console.log(reduce); |
| 52 | +q4.innerHTML = reduce |
| 53 | + |
| 54 | +// 5. Sort the inventors by years lived |
| 55 | +const sortLive = inventors.sort((a, b) => (a.passed - a.year) > (b.passed - b.year) ? -1 : 1); |
| 56 | +console.table(sortLive); |
| 57 | +q5.innerHTML = JSON.stringify(sortLive); |
| 58 | + |
| 59 | +// 6. create a list of Boulevards in Paris that contain 'de' anywhere in the name |
| 60 | +// https://en.wikipedia.org/wiki/Category:Boulevards_in_Paris |
| 61 | +// const category = document.querySelector('.mw-category'); |
| 62 | +// const links = Array.from(category.querySelectorAll('a')); |
| 63 | +// const de = links |
| 64 | +// .map(link => link.textContent) |
| 65 | +// .filter(streetName => streetName.includes('de')); |
| 66 | +q6.innerHTML = ["Boulevard de l'Amiral-Bruix", "Boulevard des Capucines", "Boulevard de la Chapelle", "Boulevard de Clichy", "Boulevard de l'Hôpital", "Boulevard des Italiens", "Boulevard de la Madeleine", "Boulevard de Magenta", "Boulevard Marguerite-de-Rochechouart", "Boulevard de Sébastopol", "Boulevard de Strasbourg", "Boulevard de la Zone"]; |
| 67 | + |
| 68 | +// 7. sort Exercise |
| 69 | +// Sort the people alphabetically by last name |
| 70 | +// 英文姓名一般都是先寫名(First Name)，再寫姓(Last Name/Surname)，若是先寫姓再寫名，標準格式是會加上一個逗號(，) |
| 71 | +const sortPeople = people.sort((a, b) => a.split(', ')[0] > b.split(', ')[0] ? 1 : -1); |
| 72 | +console.log(sortPeople); |
| 73 | +q7.innerHTML = sortPeople; |
| 74 | + |
| 75 | +// 8. Reduce Exercise |
| 76 | +// Sum up the instances of each of these |
| 77 | +const data = ['car', 'car', 'truck', 'truck', 'bike', 'walk', 'car', 'van', 'bike', 'walk', 'car', 'van', 'car', 'truck' ]; |
| 78 | +const sum = data.reduce((obj, item) => { |
| 79 | + if (!obj[item]) { |
| 80 | + obj[item] = 0; |
| 81 | + } |
| 82 | + obj[item]++; |
| 83 | + return obj; |
| 84 | +}, {}); |
| 85 | +console.log(sum); |
| 86 | +q8.innerHTML = JSON.stringify(sum); |
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