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array_cardio_day_2.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>
// ## Array Cardio Day 2
const people = [
{ name: 'Wes', year: 1988 },
{ name: 'Kait', year: 1986 },
{ name: 'Irv', year: 1970 },
{ name: 'Lux', year: 2015 }
];
const comments = [
{ text: 'Love this!', id: 523423 },
{ text: 'Super good', id: 823423 },
{ text: 'You are the best', id: 2039842 },
{ text: 'Ramen is my fav food ever', id: 123523 },
{ text: 'Nice Nice Nice!', id: 542328 }
];
// Some and Every Checks
// Array.prototype.some() // is at least one person 19 or older?
const someoneCanDrink = people.some( person => 2017 - person.year >= 19);
console.log(someoneCanDrink);
/* const isAdult = people.some(function(person) {
const currentYear = (new Date()).getFullYear();
if(currentYear - person.year >= 19) {
return true;
}
});
const isAdult = people.some(person => {
const currentYear = (new Date()).getFullYear();
return currentYear - person.year >= 19;
});
const isAdult = people.some(person => ((new Date()).getFullYear()) - person.year >= 19);*/
// Array.prototype.every() // is everyone 19 or older?
const everyoneCanDrink = people.every(person => 2017 - person.year >= 19);
console.log(everyoneCanDrink)
/* const allAdults = people.everu(person => ((new Date()).getFullYear()) - person.year >= 19); */
// Array.prototype.find()
// Find is like filter, but instead returns just the one you are looking for
// find the comment with the ID of 823423
//comments.find(comment => comment.id === 823423 );
const id = 823423;
const target = comments.find( comment => comment.id === id );
console.log(target)
/* const comment = comments.find(function(comment) {
if(comment.id === 823423) {
return true;
}
});
const comment = comments.find(comment => comment.id === 823423); */
// Array.prototype.findIndex()
// Find the comment with this ID
const target_index = comments.findIndex( comment => comment.id === id );
// delete the comment with the ID of 823423
const returnArray = [...comments.splice(0, target_index), ...comments.splice(target_index + 1)];
console.log(returnArray);
const index = comments.findIndex(comment => comment.id === 823423);
comments.splice(index, 1);
const newComments = [
...comments.slice(0, index),
...comments.slice(index + 1)
];
</script>
</body>
</html>