split string in two on given index and return both parts

Question

I have a string that I need to split on a given index and then return both parts, seperated by a comma. For example:

string: 8211 = 8,211
        98700 = 98,         


        

Answer 1

You can easily expand it to split on multiple indexes, and to take an array or string

const splitOn = (slicable, ...indices) =>
  [0, ...indices].map((n, i, m) => slicable.slice(n, m[i + 1]));

splitOn('foo', 1);
// ["f", "oo"]

splitOn([1, 2, 3, 4], 2);
// [[1, 2], [3, 4]]

splitOn('fooBAr', 1, 4);
//  ["f", "ooB", "Ar"]

lodash issue tracker: https://github.com/lodash/lodash/issues/3014