Answer 1

function findMiddle(arr1, arr2) {
    let arr = [...arr1, ...arr2].sort((a,b)=> return a-b)
    let num = arr.length%2
    return num === 1 ? arr[Math.floor(len/2)] : (arr[arr.length/2]-1 + arr[arr.length/2])/2
}
arr = [1,2,3,4,5,6,7,8]
findMiddle(arr)

Answer 2

var getParams=function(url,{data='elective'}={}){
let params = url.split(data+'=')[1];
if(params == undefined) return undefined;
let val = params.split('&')[0];
return val==''?[]:val.split(',');
}