Splitting a string into chunks by numeric or alpha character with JavaScript

Question

I have this:

var str = A123B234C456;

I need to split it into comma-separated chunks to return something like this:

A,123,B,234         


        

Answer 1

The string split method can be called with a regular expression.

If the regular expression has a capture group, the separator will be kept in the resulting array.

So here you go:

let c = "A123B234C456";
let stringsAndNumbers = c.split(/(\d+)/); // ["A", "123", "B", "234", "C", "456", ""]

Since your example ends with numbers, the last element will be empty. Remove empty array elements:

let stringsAndNumbers = c.split(/(\d+)/).filter(el => el != ""); // ["A", "123", "B", "234", "C", "456"]

Then join:

let stringsAndNumbers = c.split(/(\d+)/).filter(el => el != "").join(","); // "A,123,B,234,C,456"