How to count the number of same occurring characters in a string

Question

I am having a string like the follows: "AABAAABBC"

I need to implement javascript logic to print the following output.

2AB3A2BC

Possible duplicate of [Count the number of occurrences of a character in a string in Javascript](https://stackoverflow.com/questions/881085/count-the-number-of-occurrences-of-a-character-in-a-string-in-javascript) — 123survesh, Sep 16 '19 at 12:09
https://stackoverflow.com/questions/881085/count-the-number-of-occurrences-of-a-character-in-a-string-in-javascript — 123survesh, Sep 16 '19 at 12:10
The suggested duplicate counts characters anywhere in the string, according to its sample output OP wants to count consecutive characters — Aaron, Sep 16 '19 at 12:12

User863 · Answer 1 · 2019-09-16T12:24:25.340

3

Using replace

(.)\1+ demo

var str = 'AABAAABBC'

var res = str.replace(/(.)\1+/g, (match, p1) => match.length + p1)

console.log(res)

edited Sep 16 '19 at 12:24

answered Sep 16 '19 at 12:14

User863

1 Answers1