Use set and filter to find the difference between two arrays.
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let fruits1 = ["apple", "orange", "grapes"];
let fruits2 = ["banana", "mango", "apple"];
let difFruits = [...new Set(fruits1)].filter((item) => !fruits2.includes(item));
console.log(difFruits); // [ 'orange', 'grapes' ]
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Similarly if you want to find the elements common in both arrays, you could employ a slightly different strategy.
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let fruits1 = ["apple", "orange", "grapes"];
let fruits2 = ["banana", "mango", "apple"];
let commonFruits = [...new Set(fruits1)].filter((item) =>
fruits2.includes(item)
);
console.log(commonFruits); // [ 'apple' ]
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Traditionally, you would have executed two loops to find differences between arrays. Something like -
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let fruits1 = ["apple", "orange", "grapes"];
let fruits2 = ["banana", "mango", "apple"];
const difFruits = [];
for (fruitOne of fruits1) {
let found = false;
for (fruitTwo of fruits2) {
if (fruitTwo == fruitOne) {
found = true;
break;
}
} // fruits2 loop
if (!found) difFruits.push(fruitOne);
} // fruits1 loop
console.log(difFruits); // [ 'orange', 'grapes' ]
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We live in exciting times for sure.
