I try to find a solution to sum cost data (to group thme by day) with ISO date information in object.
My data object looks like :
0: {id: 45, title: 'abo', cost: 10, recurrent: true, date: '2022-02-09T20:43:30.139Z'}
1: {id: 123, title: 'test 4', cost: 20, recurrent: false, date: '2022-02-09T20:43:30.139Z'}
2: {id: 125, title: 'test 3', cost: 50, recurrent: false, date: '2022-02-06T23:00:00.000Z'}
3: {id: 125, title: 'test 2', cost: 100, recurrent: false, date: '2022-02-05T10:00:00.000Z'}
4: {id: 125, title: 'test 1', cost: 122, recurrent: false, date: '2022-02-04T23:00:00.000Z'}
The expected result :
sumData = [222,50,30]
I try to sum with something like that :
let currentDate = '';
let currentTotal = 0;
let sumData = [];
if(data) {
for (let index = 0; index < data.length; index++) {
//init date to compare with
if(currentDate === '') {
currentDate = new Date(data[index].date);
currentTotal = data[index].cost;
}
else {
const nextDate = new Date(data[index].date);
//test if is same day, sum expenses and add in sumData array
if(currentDate.getFullYear() === nextDate.getFullYear() &&
currentDate.getMonth() === nextDate.getMonth() &&
currentDate.getDate() === nextDate.getDate())
{
console.log('DATE = ' + currentDate.getDate());
console.log(data[index].date);
console.log('COST = ' + data[index].cost);
console.log('currentTotal = ' + currentTotal);
currentTotal = currentTotal + data[index].cost;
console.log(index + ' - COST = ' + data[index].cost);
console.log('TOTAL = ' + currentTotal);
console.log('===========');
}
else {
//push last valid sum before reset
currentTotal = 0;
//reset sum with last data
currentTotal = data[index].cost;
}
currentDate = new Date(data[index].date);
}
}
}
console.log('== SUM data ==');
sumData.push(currentTotal);
You can do it this way.
Please note that I updated your last date, as it was 2022-02-04 instead of 2022-02-05 as it is told in your question.
var array = [
{id: 45, title: 'abo', cost: 10, recurrent: true, date: '2022-02-09T20:43:30.139Z'},
{id: 123, title: 'test 4', cost: 20, recurrent: false, date: '2022-02-09T20:43:30.139Z'},
{id: 125, title: 'test 3', cost: 50, recurrent: false, date: '2022-02-06T23:00:00.000Z'},
{id: 125, title: 'test 2', cost: 100, recurrent: false, date: '2022-02-05T10:00:00.000Z'},
{id: 125, title: 'test 1', cost: 122, recurrent: false, date: '2022-02-05T23:00:00.000Z'},
];
var result = [];
array.reduce(function(res, value) {
let onlyDate = value.date.split('T')[0];
// Second approach is just to take first 10 characters of a substring like this:
// let onlyDate = value.date.substring(0, 10);
if (!res[onlyDate]) {
res[onlyDate] = { date: onlyDate, cost: 0 };
result.push(res[onlyDate])
}
res[onlyDate].cost += value.cost;
return res;
}, {});
console.log("Result in format date/cost");
console.log(result);
const onlyCostsResult = result.map(item => item.cost);
console.log("Only costs");
console.log(onlyCostsResult);You can try to use .reduce() and Object.values() to achieve your goal:
const data = [
{id: 45, title: 'abo', cost: 10, recurrent: true, date: '2022-02-09T20:43:30.139Z'},
{id: 123, title: 'test 4', cost: 20, recurrent: false, date: '2022-02-09T20:43:30.139Z'},
{id: 125, title: 'test 3', cost: 50, recurrent: false, date: '2022-02-06T23:00:00.000Z'},
{id: 125, title: 'test 2', cost: 100, recurrent: false, date: '2022-02-05T10:00:00.000Z'},
{id: 125, title: 'test 1', cost: 122, recurrent: false, date: '2022-02-04T23:00:00.000Z'}
]
const res = Object.values(data.reduce((resMap, obj) => {
const date = new Date(obj.date).toLocaleString().split(',')[0]
if (resMap[date] !== undefined)
resMap[date] += obj.cost
else
resMap[date] = obj.cost
return resMap;
}, {}))
console.log(res)Update: use ISO8601 date