bluurn · February 1, 2019 09:15
diff --git a/flatten.js b/flatten.js
 function flatten(arr) {
    return arr.reduce((acc, it) => 
        acc.concat((it instanceof Array) ? flatten(it) : it)
    , [])
 }
 flatten([[[1, [1.1]], 2, 3], [4, 5]]);
	function flatten(arr) {
	return arr.reduce((acc, it) =>
	acc.concat((it instanceof Array) ? flatten(it) : it)
	, [])
	}
	flatten([[[1, [1.1]], 2, 3], [4, 5]]);