|
| 1 | +// Get your shorts on - this is an array workout! |
| 2 | +// ## Array Cardio Day 1 |
| 3 | + |
| 4 | +// Some data we can work with |
| 5 | + |
| 6 | +const inventors = [ |
| 7 | + { first: "Albert", last: "Einstein", year: 1879, passed: 1955 }, |
| 8 | + { first: "Isaac", last: "Newton", year: 1643, passed: 1727 }, |
| 9 | + { first: "Galileo", last: "Galilei", year: 1564, passed: 1642 }, |
| 10 | + { first: "Marie", last: "Curie", year: 1867, passed: 1934 }, |
| 11 | + { first: "Johannes", last: "Kepler", year: 1571, passed: 1630 }, |
| 12 | + { first: "Nicolaus", last: "Copernicus", year: 1473, passed: 1543 }, |
| 13 | + { first: "Max", last: "Planck", year: 1858, passed: 1947 }, |
| 14 | + { first: "Katherine", last: "Blodgett", year: 1898, passed: 1979 }, |
| 15 | + { first: "Ada", last: "Lovelace", year: 1815, passed: 1852 }, |
| 16 | + { first: "Sarah E.", last: "Goode", year: 1855, passed: 1905 }, |
| 17 | + { first: "Lise", last: "Meitner", year: 1878, passed: 1968 }, |
| 18 | + { first: "Hanna", last: "Hammarström", year: 1829, passed: 1909 }, |
| 19 | +]; |
| 20 | + |
| 21 | +const people = [ |
| 22 | + "Bernhard, Sandra", |
| 23 | + "Bethea, Erin", |
| 24 | + "Becker, Carl", |
| 25 | + "Bentsen, Lloyd", |
| 26 | + "Beckett, Samuel", |
| 27 | + "Blake, William", |
| 28 | + "Berger, Ric", |
| 29 | + "Beddoes, Mick", |
| 30 | + "Beethoven, Ludwig", |
| 31 | + "Belloc, Hilaire", |
| 32 | + "Begin, Menachem", |
| 33 | + "Bellow, Saul", |
| 34 | + "Benchley, Robert", |
| 35 | + "Blair, Robert", |
| 36 | + "Benenson, Peter", |
| 37 | + "Benjamin, Walter", |
| 38 | + "Berlin, Irving", |
| 39 | + "Benn, Tony", |
| 40 | + "Benson, Leana", |
| 41 | + "Bent, Silas", |
| 42 | + "Berle, Milton", |
| 43 | + "Berry, Halle", |
| 44 | + "Biko, Steve", |
| 45 | + "Beck, Glenn", |
| 46 | + "Bergman, Ingmar", |
| 47 | + "Black, Elk", |
| 48 | + "Berio, Luciano", |
| 49 | + "Berne, Eric", |
| 50 | + "Berra, Yogi", |
| 51 | + "Berry, Wendell", |
| 52 | + "Bevan, Aneurin", |
| 53 | + "Ben-Gurion, David", |
| 54 | + "Bevel, Ken", |
| 55 | + "Biden, Joseph", |
| 56 | + "Bennington, Chester", |
| 57 | + "Bierce, Ambrose", |
| 58 | + "Billings, Josh", |
| 59 | + "Birrell, Augustine", |
| 60 | + "Blair, Tony", |
| 61 | + "Beecher, Henry", |
| 62 | + "Biondo, Frank", |
| 63 | +]; |
| 64 | + |
| 65 | +// Array.prototype.filter() |
| 66 | +// 1. Filter the list of inventors for those who were born in the 1500's |
| 67 | +const fifteen = inventors.filter( |
| 68 | + (inventor) => inventor.year >= 1500 && inventor.year < 1600 |
| 69 | +); |
| 70 | + |
| 71 | +console.table(fifteen); |
| 72 | + |
| 73 | +// Array.prototype.map() |
| 74 | +// 2. Give us an array of the inventors first and last names |
| 75 | +const fullNames = inventors.map( |
| 76 | + (inventor) => `${inventor.first} ${inventor.last}` |
| 77 | +); |
| 78 | +console.log(fullNames); |
| 79 | + |
| 80 | +// Array.prototype.sort() |
| 81 | +// 3. Sort the inventors by birthdate, oldest to youngest |
| 82 | +const ordered = inventors.sort((a, b) => (a.year > b.year ? 1 : -1)); |
| 83 | + |
| 84 | +console.table(ordered); |
| 85 | + |
| 86 | +// Array.prototype.reduce() |
| 87 | +// 4. How many years did all the inventors live all together? |
| 88 | +const totalYears = inventors.reduce((total, inventor) => { |
| 89 | + return total + (inventor.passed - inventor.year); |
| 90 | +}, 0); |
| 91 | + |
| 92 | +console.log(totalYears); |
| 93 | + |
| 94 | +// 5. Sort the inventors by years lived |
| 95 | +const oldest = inventors.sort((a, b) => { |
| 96 | + const lastGuy = a.passed - a.year; |
| 97 | + const nextGuy = b.passed - b.year; |
| 98 | + return lastGuy > nextGuy ? 1 : -1; |
| 99 | +}); |
| 100 | + |
| 101 | +console.table(oldest); |
| 102 | + |
| 103 | +// 6. create a list of Boulevards in Paris that contain 'de' anywhere in the name |
| 104 | +// https://en.wikipedia.org/wiki/Category:Boulevards_in_Paris |
| 105 | +// const category = document.querySelector(".mw-category"); |
| 106 | +// const links = Array.from(category.querySelectorAll("a")); |
| 107 | +// const de = links |
| 108 | +// .map((link) => link.textContent) |
| 109 | +// .filter((streetName) => streetName.includes("de")); |
| 110 | + |
| 111 | +// 7. sort Exercise |
| 112 | +// Sort the people alphabetically by last name |
| 113 | +const alpha = people.sort((lastOne, nextOne) => { |
| 114 | + const [alast, afirst] = lastOne.split(", "); |
| 115 | + const [blast, bfirst] = nextOne.split(", "); |
| 116 | + return alast > blast ? 1 : -1; |
| 117 | +}); |
| 118 | + |
| 119 | +console.log(alpha); |
| 120 | + |
| 121 | +// 8. Reduce Exercise |
| 122 | +// Sum up the instances of each of these |
| 123 | +const data = [ |
| 124 | + "car", |
| 125 | + "car", |
| 126 | + "truck", |
| 127 | + "truck", |
| 128 | + "bike", |
| 129 | + "walk", |
| 130 | + "car", |
| 131 | + "van", |
| 132 | + "bike", |
| 133 | + "walk", |
| 134 | + "car", |
| 135 | + "van", |
| 136 | + "car", |
| 137 | + "truck", |
| 138 | +]; |
| 139 | + |
| 140 | +const transportation = data.reduce((obj, item) => { |
| 141 | + if (!obj[item]) { |
| 142 | + obj[item] = 0; |
| 143 | + } |
| 144 | + obj[item]++; |
| 145 | + return obj; |
| 146 | +}, {}); |
| 147 | + |
| 148 | +console.log(transportation); |
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