// 并集
const union = (setA, setB) => {
return new Set([...setA, ...setB])
}
// 交集
const intersection = (setA, setB) => {
return new Set([...setA].filter(x => setB.has(x)))
}
//差集
const difference = (setA, setB) => {
return new Set([...setA].filter(x => !setB.has(x)))
}
set 快速实现 并集 交集 差集
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转载自blog.csdn.net/lianjiuxiao/article/details/114548186
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