sholadedokun

function filterLists(list){
    try{
      let filteredList=list.filter(function(item, index){
        return item.age >= 30 && item.age <= 40
      });
      let genderIndex=[]
      let groupedList=filteredList.reduce(function(accum, item, index){
        let gIndex= genderIndex.indexOf(item.gender);
        if(gIndex>=0){
          accum[gIndex].push(item);

sholadedokun

let persons=[
  { name:"Jude", age:30 },
  { name:"Lily", age:25 },
  { name:"Mark", age:34 },
  { name:"Luke", age:18 },
  { name:"John", age:55 },
  { name:"Jack", age:12 }
]
sortedPersons=persons.sort((a, b)=> a.age - b.age)