flat nested array js code example
Example: flatten nested array javascript
// using recursion, .reduce() and .concat() methods
// works with arrays of any depth
function flatten(arr)
{
return arr.reduce((acc, cur) => acc.concat(Array.isArray(cur) ? flatten(cur) : cur), []);
};
const arr = [[1,2],[3,[4,[5]]]];
const flattened = flatten(arr);
console.log(flattened);
/*
Output: [ 1, 2, 3, 4, 5 ]
*/