I have an array of objects that looks like this:
[{"A_abs":4,"A_perc":2, "B_abs":4,"B_perc":2, ...},{"A_abs":4,"A_perc":2, "B_abs":4,"B_perc":2, ...},{"A_abs":4,"A_perc":2, "B_abs":4,"B_perc":2, ...},{"A_abs":4,"A_perc":2, "B_abs":4,"B_perc":2, ...}]
There can be up to n elements in each object, each one consists of a _perc and an _abs value.
I want to reduce the array to only 1 entry and sum each _abs value, the _perc can be anything else, like "-".
An expected result would be:
{"A_abs": 16, "A_perc": "-" "B_abs": 16, "B_perc": "-" "C_abs": x, "C_perc": "-", ...}
The solution of this question does not fully statisfy me because I don't know how to adapt the function to only sum the "_abs" values.
How to adapt this function to only sum the _abs values, regardles of how many entries the object has?
var data = [{"A_abs":4,"A_perc":2, "B_abs":4,"B_perc":2},{"A_abs":4,"A_perc":2, "B_abs":4,"B_perc":2},{"A_abs":4,"A_perc":2, "B_abs":4,"B_perc":2},{"A_abs":4,"A_perc":2, "B_abs":4,"B_perc":2}],
result = data.reduce((r, o) => (Object.entries(o).forEach(([k, v]) => r[k] = (r[k] || 0) + v), r), {});
console.log(result);You can check if the key ends with _abs and only if it does you add the values else you simply assign a value of -.
const data = [
{ A_abs: 4, A_perc: 2, B_abs: 4, B_perc: 2 },
{ A_abs: 4, A_perc: 2, B_abs: 4, B_perc: 2 },
{ A_abs: 4, A_perc: 2, B_abs: 4, B_perc: 2 },
{ A_abs: 4, A_perc: 2, B_abs: 4, B_perc: 2 },
],
result = data.reduce(
(r, o) => (
Object.entries(o).forEach(([k, v]) =>
k.endsWith("_abs") ? (r[k] = (r[k] || 0) + v) : (r[k] = "-")
),
r
),
{}
);
console.log(result);