SOURCE

// 测评模板等级
let aLevel=[0,10]
let bLevel=[10,15]
let cLevel=[12,20]
let dLevel=[25,30]

// 按照需求 当前等级的startScore 必须等于上一等级的endScore 若是第一个等级则起始等级为0

let aLevelBySet=new Set(aLevel)
let clevelBySet=new Set(cLevel)
let intersect = bLevel.filter(score=>{ return score>aLevel[0]&&score<aLevel[1] })
let hasReaptScore = bLevel.filter(score=>{ return score>cLevel[0]&&score<cLevel[1] })
let difference = cLevel.filter(score=>{ return new Set(dLevel).has(score) })

console.log(intersect)
console.log(hasReaptScore)
console.log(difference)