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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Array Cardio 💪</title>
</head>
<body>
<p><em>Psst: have a look at the JavaScript Console</em> 💁</p>
<script>
// 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 flavours = ['Chocolate Chip', 'Kulfi', 'Caramel Praline', 'Chocolate', 'Burnt Caramel', 'Pistachio', 'Rose', 'Sweet Coconut', 'Lemon Cookie', 'Toffeeness', 'Toasted Almond', 'Black Raspberry Crunch', 'Chocolate Brownies', 'Pistachio Almond', 'Strawberry', 'Lavender Honey', 'Lychee', 'Peach', 'Black Walnut', 'Birthday Cake', 'Mexican Chocolate', 'Mocha Almond Fudge', 'Raspberry'];
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
// filter will return 2 out of 10
var fifteen = inventors.filter(function(investor) {
if (investor.year >= 1500 && investor.year < 1599) {
return true;// keep it
}
});
// using the reduce to implement filter
// var fifteen = inventors.reduce(function(acc, investor) {
// if (investor.year >= 1500 && investor.year < 1599) {
// acc.push(inventor);
// }
// return acc;
// }, []);
console.log(fifteen);
// Array.prototype.map()
// 2. Give us an array of the inventors' first and last names
// map return the amount of array you give it
var fullNames = inventors.map(function(investor) {
return investor.first + ' ' + investor.last;
});
console.log(fullNames);
// Array.prototype.sort()
// 3. Sort the inventors by birthdate, oldest to youngest
// two items, return 1, or 1-
var ordered = inventors.sort(function(firstPerson, secondPerson) {
if (firstPerson.year > secondPerson.year) {
return 1;
} else {
return -1;
}
});
// Simple way to implement
//var ordered = inventors.sort((a, b) => a.year > b.year ? 1 : -1);
console.table(ordered);
// Array.prototype.reduce()
// 4. How many years did all the inventors live?
var totalYears = inventors.reduce(function(total, investor) {
return total + (investor.passed - investor.year);
}, 0);
console.log(totalYears);
// 5. Sort the inventors by years lived
var oldest = inventors.sort(function(a, b) {
var lastGuy = a.passed - a.year;
var nextGuy = b.passed - b.year;
if (lastGuy > nextGuy) {
return -1;
} else {
return 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
// var category = document.querySelector('.mw-category');
// var links = Array.from(category.querySelectorAll('a'));
// //
// var de = links.map(function(link) {
// return link.textContent;
// }).filter(function(streetName) {
// return streetName.includes('de');
// });
// 7. sort Exercise
// Sort the people alphabetically by last name
var alpha = people.sort(function(lastOne, nextOne) {
var [aFirst, aLast] = lastOne.split(', ');
var [bFirst, bLast] = nextOne.split(', ');
return aLast > bLast ? 1 : -1
});
console.log(alpha);
// 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' ];
var transportation = data.reduce(function(obj, item) {
if (!obj[item]) {
obj[item] = 0;
}
obj[item]++;
return obj;
}, {});
console.log(transportation);
</script>
</body>
</html>