Sum Of Same Nested Array Data Using Jquery

sample data array_data = [ [6326586, 0.4126], [6326586, 0.48], [6326586, 0.45], [6326586, 0.35], [6326586, 0.2685], [6326614, 0.4008], [6326614, 0.1], [6326614, 0.

Solution 1:

Using Map and Array#Reduce in Vanilla JS

const 
  arr = [[6326586,.4126],[6326586,.48],[6326586,.45],[6326586,.35],[6326586,.2685],[6326614,.4008],[6326614,.1],[6326614,.074],[6327407,.066],[6327408,.1],[6344999,.1572],[6344999,.003],[6394500,.2112]], 

  res = Array.from(arr.reduce((m, [k, v]) => m.set(k, (m.get(k) || 0) + v), new Map()))

console.log(res)

Using Object and Array#Reduce in Vanilla JS

** Go through the comments before using this

const 
  arr = [[6326586,.4126],[6326586,.48],[6326586,.45],[6326586,.35],[6326586,.2685],[6326614,.4008],[6326614,.1],[6326614,.074],[6327407,.066],[6327408,.1],[6344999,.1572],[6344999,.003],[6394500,.2112]], 
  
  res = Object.values(arr.reduce((o, [k, v]) => (o[k] ??= [k, 0], o[k][1] += v, o), {}));

console.log(res)

Solution 2:

You can do this in plain JavaScript, you don't need jQuery. You can use Array.reduce as follows:

const array_data = [
  [6326586, 0.4126],
  [6326586, 0.48],
  [6326586, 0.45],
  [6326586, 0.35],
  [6326586, 0.2685],
  [6326614, 0.4008],
  [6326614, 0.1],
  [6326614, 0.074],
  [6327407, 0.066],
  [6327408, 0.1],
  [6344999, 0.1572],
  [6344999, 0.003],
  [6394500, 0.2112]
]

const result = array_data.reduce((acc, [key, value]) => {
  if (acc[key]) {
    acc[key][1] += value;
  } else {
    acc[key] = [key, 0];
  }
  return acc;
}, {});

console.log(Object.values(result));