ds-algo-study/Resources/My-Data-Structures-Notes/tiny-prac-probs/problems/05-recursive-flatten.js

Just experimenting with publishing a package

/***********************************************************************
Write a recursive function called `flatten` that takes a single array with
any number of nested arrays and returns and array with all the nested
contents on one level.

Examples:

flatten([]); // => []
flatten([1, 2]); // => [1, 2]
flatten([1, [2, [3]]]); // => [1, 2, 3]
***********************************************************************/

function flatten(arr) {
  let newArray = [];

  arr.forEach(function (contents) {
      if (Array.isArray(contents)) {
        newArray.push(...flatten(contents));
      } else {
        newArray.push(contents);
      }
  });

  return newArray;
}
  
/**************DO NOT MODIFY ANYTHING UNDER THIS LINE*****************/
module.exports = flatten;