Tell us what’s happening:
I am missing something …somehow my code does not return the correct sequence.
the outputs are -
[“a”, “b”] for steamrollArray([[[“a”]], [[“b”]]])
[1, 2, 3] for steamrollArray([1, [2], [3, [[4]]]])
[1, undefined, 3] for steamrollArray([1, [], [3, [[4]]]])
[1, {…}, 3] for steamrollArray([1, {}, [3, [[4]]]])
Your code so far
function steamrollArray(arr) {
function flatten(item){
if(Array.isArray(item)){
for (let a in item){
return flatten(item[a]);
}
}else { return item;}}
console.log(arr.map(flatten));
return arr.map(flatten);
}
steamrollArray([1, [2], [3, [[4]]]]);
Your browser information:
User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36.
Link to the challenge:
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/steamroller/