zakfisher

// Create our array-flattening method (using a recursive approach)
const flatten = (arr) => {

  // Return a new flattened array
  return arr.reduce((prev, next) => {
    
    // Make sure we have an array to add items to
    prev = Array.isArray(prev) ? prev : [prev]
    
    // If the next element in `arr` is not an array, add it to our flattened array