let arr = [
{
Category:'A',
Amount:1,
},{
Category:'B',
Amount:2,
},{
Category:'A',
Amount:3,
},{
Category:'C',
Amount:4,
},{
Category:'B',
Amount:5,
},{
Category:'C',
Amount:6,
},{
Category:'A',
Amount:7,
},{
Category:'C',
Amount:8,
let temp = {};
let end = [];
for(let i = 0; i < arr.length; i++){
let a = arr[i];
if(!temp[a.Category]){
end.push({
Category: a.Category,
data: [a]
});
temp[a.Category] = a;
}else{
for(let j = 0; j < end.length; j++){
let b = end[j];
if(b.Category == a.Category){
b.data.push(a);
break;
console.log(end);