SOURCE

// 对给定的数组value做去重后相乘
const Array = [{value:6},{value:2},{value:3},{value:5},{value:2},{value:5}]

function multiple(array) {
    var res = 1
    var map = new Map()
    for (let i of array) {
        if (!map.has(i.value)) {
            map.set(i.value,1)
            res *= i.value
        }
    }
    return res   
}

console.log(multiple(Array))