Iterative solution for flattening n-th nested arrays in Javascript

Question

Can anyone show me an iterative solution for the following problem? I solved it recursively but struggled with an iterative solution. (Facebook Technical Interv

Answer 1

function flatten(array){
  for(var i=0;i

This in-place solution is faster than Lupe's, now that I've removed all of the inner curly brackets (I inlined the i-- in the concat parameter to do that).