flattenArray

flattenarray.markdown

flattenArray

Flattens any array dimension to one dimensional array using ES2015 reduce function and recursion

A Pen by Vlad Bezden on CodePen.

License.

script.js

'option strict'

/**
* Flatten an array of arbitrarily nested arrays into a flat array
*
* @params {!number[[[]]]} data:  array of arbitrarily nested arrays
* @returns {!number[]}: one dimensinal array
*/
function flattenArray(data) {
  return data.reduce((prev, curr) =>
    prev.concat(Array.isArray(curr) ?
      flattenArray(curr) :
      curr), []
  )
}


// Examples
const log = (data, result) => console.log('result for: ', data, ' => ', result)

let data = [[1, 2, [3]], 4]
let result = flattenArray(data)
log(data, result)

data = [1]
result = flattenArray(data)
log(data, result)

data = [[[1]]]
result = flattenArray(data)
log(data, result)