I have the current code (snippet) but I want to count the total of the answers
Example:
"2022-01-03": {
"yes": 1,
"no": 2,
"total": 3
}
const array = [
{ date: '2022-01-03', answer: 'yes' },
{ date: '2022-01-03', answer: 'no' },
{ date: '2022-01-03', answer: 'no' },
{ date: '2022-01-04', answer: 'yes' },
{ date: '2022-01-04', answer: 'yes' },
{ date: '2022-01-05', answer: 'yes' },
{ date: '2022-01-05', answer: 'yes' },
{ date: '2022-01-05', answer: 'yes' },
{ date: '2022-01-05', answer: 'no' },
]
const result = array.reduce((acc, curr) => {
if (!acc[curr.date]) {
acc[curr.date] = { yes: 0, no: 0 }
}
acc[curr.date][curr.answer]++;
return acc;
}, {});
console.log(result)What is the correct way to do it?
You can add a total field and increment for every value:
const array = [
{ date: '2022-01-03', answer: 'yes' },
{ date: '2022-01-03', answer: 'no' },
{ date: '2022-01-03', answer: 'no' },
{ date: '2022-01-04', answer: 'yes' },
{ date: '2022-01-04', answer: 'yes' },
{ date: '2022-01-05', answer: 'yes' },
{ date: '2022-01-05', answer: 'yes' },
{ date: '2022-01-05', answer: 'yes' },
{ date: '2022-01-05', answer: 'no' },
]
const result = array.reduce((acc, curr) => {
if (!acc[curr.date]) {
acc[curr.date] = { yes: 0, no: 0, total: 0 }
}
acc[curr.date][curr.answer]++;
acc[curr.date].total++;
return acc;
}, {});
console.log(result).as-console-wrapper { max-height: 100% !important; }Create a getter field for total, so it will be automatically calculated:
const array = [
{ date: '2022-01-03', answer: 'yes' },
{ date: '2022-01-03', answer: 'no' },
{ date: '2022-01-03', answer: 'no' },
{ date: '2022-01-04', answer: 'yes' },
{ date: '2022-01-04', answer: 'yes' },
{ date: '2022-01-05', answer: 'yes' },
{ date: '2022-01-05', answer: 'yes' },
{ date: '2022-01-05', answer: 'yes' },
{ date: '2022-01-05', answer: 'no' },
]
const result = array.reduce((acc, curr) => {
if (!acc[curr.date]) {
acc[curr.date] = {
yes: 0, no: 0,
get total() { return this.yes + this.no; }
}
}
acc[curr.date][curr.answer]++;
return acc;
}, {});
console.log(result)I didn't see any problem in your code, but I shortened one line and it became more optimized.
From:
const result = array.reduce((acc, curr) => {
if (!acc[curr.date]) {
acc[curr.date] = { yes: 0, no: 0 }
}
acc[curr.date][curr.answer]++;
return acc;
}, {});
to
const result = array.reduce((acc, curr) => {
acc[curr.date] ||= { yes: 0, no: 0, total: 0 };
acc[curr.date][curr.answer]++;
acc[curr.date][total]++
return acc;
}, {});