Array.prototype.flatten = function() {
var flattened = [];
function flatten(list) {
list.forEach(function(item) {
if (Array.isArray(item)) {
flatten(item);
} else {
flattened.push(item);
} // End of recursion
}); // End of Array exploration
} // End of inner method
flatten(this);
return flattened;
}; // End of Flatten function
// USE CASE
//------------
var arr = ["lol", [4, 5, {}, ["some", true]], 90, null, [2, [9, 21], "flat"]];
console.log(arr.flatten());
// Outputs -> "["lol", 4, 5, {}, "some", true, 90, null, 2, 9, 21, "flat"]"
Helper function to flatten all sub-arrays inside an array ─ This snippet is a piece of a JavaScript library I'm working on, you can see it here: https://github.com/luishendrix92/WindowbirdJS
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