Set.prototype.isDisjointFrom()
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Set isDisjointFrom() .
In this article
js
isDisjointFrom(other)
other true, false .
. .
A is disjoint from BAB=A\text{ is disjoint from }B \Leftrightarrow A\cap B = \empty.
![[ . A B .]](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/isDisjointFrom/diagram.svg){kind=link}
union() other . this this Set . this other .
thisother.sizeotherkeys()other,otherthisfalse(return()keys()).true.- ,
thisthiseother.has(e)false.true.
isDisjointFrom() this other ( ).
isDisjointFrom()
(20 ) (20 ) , 1 .
js
const primes = new Set([2, 3, 5, 7, 11, 13, 17, 19]);
const squares = new Set([1, 4, 9, 16]);
console.log(primes.isDisjointFrom(squares)); // true
1 (20 ) (20 ) .
js
const composites = new Set([4, 6, 8, 9, 10, 12, 14, 15, 16, 18]);
const squares = new Set([1, 4, 9, 16]);
console.log(composites.isDisjointFrom(squares)); // false
| Specification |
|---|
| ECMAScript 2027 LanguageSpecification # sec-set.prototype.isdisjointfrom |