let temp = []
n1.concat(n2).sort().sort((a,b) => {
if(a == b && temp.indexOf(a) == -1){
temp.push(a)
}
})
console.log('temp',temp)
let temp = []
n1.concat(n2).sort().sort((a,b) => {
if(a == b && temp.indexOf(a) == -1){
temp.push(a)
}
})
console.log('temp',temp)