how to create array of value from JSON array in javascript

Question

Please find my json array, I want to form array of data in below format:

[Sunday.a_count.value, Monday.a_count.value, Tuesday.a_count.value, Wednesday.a_count.value] - This format output will be [0, 2, 2, 3] -

Eventually, these values come from Sunday a_count, Monday a_count, Tuesday a_count and Wednesday a_count.

I'm not able to form the data in above format using below json in javascript, if someone can help to achieve this it will be really helpful.

Thanks!

[ {
  "day" : "Sunday",
  "a_count" : 0,
  "b_count" : 2,
  "c_count" : 0,
  "d_count" : 0
}, {
  "day" : "Monday",
  "a_count" : 2,
  "b_count" : 0,
  "c_count" : 0,
  "d_count" : 0
}, {
  "day" : "Tuesday",
  "a_count" : 2,
  "b_count" : 0,
  "c_count" : 0,
  "d_count" : 0
}, {
  "day" : "Wednesday",
  "a_count" : 3,
  "b_count" : 0,
  "c_count" : 0,
  "d_count" : 0
} ]

Answer 1

As I understood, you want to get value from a_count, you can do it with .map, like so

var data = [ {
  "day" : "Sunday",
  "a_count" : 0,
  "b_count" : 2,
  "c_count" : 0,
  "d_count" : 0
}, {
  "day" : "Monday",
  "a_count" : 2,
  "b_count" : 0,
  "c_count" : 0,
  "d_count" : 0
}, {
  "day" : "Tuesday",
  "a_count" : 2,
  "b_count" : 0,
  "c_count" : 0,
  "d_count" : 0
}, {
  "day" : "Wednesday",
  "a_count" : 3,
  "b_count" : 0,
  "c_count" : 0,
  "d_count" : 0
} ];

var res = data.map(function (el) {
  return el.a_count;
});

console.log(res);