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arrayCardioDay_1.html
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arrayCardioDay_1.html
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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 }
];
// Array.prototype.filter()
// 1. Filter the list of inventors for those who were born in the 1500's
const fifteen = inventors.filter(
inventor => inventor.year >= 1500 && inventor.year < 1600
);
console.table(fifteen);
// Array.prototype.map()
// 2. Give us an array of the inventor first and last names
const fullNames = inventors.map(
inventor => `${inventor.first} ${inventor.last}`
);
console.log(fullNames);
// Array.prototype.sort()
// 3. Sort the inventors by birthdate, oldest to youngest
// const ordered = inventors.sort(function(a, b) {
// if(a.year > b.year) {
// return 1;
// } else {
// return -1;
// }
// });
const 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?
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(function(a, b) {
const lastInventor = a.passed - a.year;
const nextInventor = b.passed - b.year;
return lastInventor > nextInventor ? -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"));
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"
];
// 7. sort Exercise
// Sort the people alphabetically by last name
const alpha = people.sort((lastOne, nextOne) => {
const [aLast, aFirst] = lastOne.split(", ");
const [bLast, bFirst] = 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",
"pogostick"
];
const transportation = data.reduce(function(obj, item) {
if (!obj[item]) {
obj[item] = 0;
}
obj[item]++;
return obj;
}, {});
console.log(transportation);
</script>
</body>
</html>