JS: How to count all values in nested array [duplicate]

Question

I'm using a nested array like this:

const data = [
  [0],
  [2],
  [[1], 3]
  1
]

Is it possible to count all values together. In this example the result should be 7 (0+2+1+3+1). And is it also possible to count how many arrays are used? This would be 5 arrays

Jonas Wilms · Accepted Answer · 2018-01-19 13:41:28Z

8

 const sumUp = array => array.reduce((sum, el) => sum + (Array.isArray(el) ? sumUp(el) : +el), 0);

This uses a recursive approach with reduce.

answered Jan 19, 2018 at 13:41

Jonas Wilms

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2 Comments

user3142695 Over a year ago

Is it possible to count also the arrays?

Jonas Wilms Over a year ago

Yes it is. May try that yourself? ;)

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