Set Methods for JavaScript

JavaScriptのSetに対する新しいmethodの追加の提案

2つのSetの共通要素

code:js

let set1 = new Set("apples", "bananas");

let set2 = new Set("apples", "oranges");

console.log(set1.intersection(set2)); // Set(1) {'apples'}

2つのSetの和

code:js

let set1 = new Set("apples", "bananas");

let set2 = new Set("apples", "oranges");

console.log(set1.union(set2)); // Set(3) {'apples', 'bananas', 'oranges'}

差

2つのSetの共通していない部分

code:js

let set1 = new Set("apples", "bananas");

let set2 = new Set("apples", "oranges");

console.log(set1.symmetricDifference(set2)); // Set(2) {'bananas', 'oranges'}

subsetかどうか

code:js

let set1 = new Set("apples", "bananas");

console.log(set1.isSubsetOf(set2)); // true

supersetかどうか

code:ts

let set2 = new Set("apples", "bananas");

console.log(set1.isSupersetOf(set2)); // true

交差していないかどうか

交差していないとtrue

code:js

let set1 = new Set("apples", "bananas");

let set2 = new Set("oranges", "pears");

console.log(set1.isDisjointFrom(set2)); // true