Get String Specific Characters

Question

I am trying to write some code that takes a uuid string and returns only the characters between the 2nd and 3rd _ characters in an array. What I currently have below is returning every character in the string in to the array. I have been looking at this for some time and am obviously missing something glaringly obvious I suppose. Can someone maybe point out what is wrong here?

var uuid = "159as_ss_5be0lk875iou_.1345.332.11.2"
var count = 0
var  values = []
            
for(y=0; y<uuid.length; y++){
    if(uuid.charAt(y) == '_'){
        count++
    }
    if(count = 2){
        values.push(uuid.charAt(y))
    }
}
return values

EDIT:

So for my case I would want the values array to contain all of the characters in 5be0lk875iou

why not just split by '_'? and then get the value like this: resultAfterSplit[2] — Rusu Dinu, Aug 11 '22 at 11:56
Does this answer your question? [Get Substring between two characters using javascript](https://stackoverflow.com/questions/14867835/get-substring-between-two-characters-using-javascript) — Heretic Monkey, Aug 11 '22 at 11:59
@RusuDinu for whatever reason that never crossed my mind. Very much easier. Thank you! — user19353552, Aug 11 '22 at 11:59
Or https://stackoverflow.com/questions/7365575/how-to-get-text-between-two-characters — Heretic Monkey, Aug 11 '22 at 12:00
Or [parse a string in javascript by a common delimiter](https://stackoverflow.com/q/17205190/215552) — Heretic Monkey, Aug 11 '22 at 12:01
As an optimization you could pass a limit to [`strip()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/split) so that it doesn't have to process the string passed the point of interest. `uuid.split("_", 3)[2]` — 3limin4t0r, Aug 11 '22 at 12:05
If the string has a fixed length and structure you could also use `uuid.slice(9, 21)`. — 3limin4t0r, Aug 11 '22 at 12:13

score 0 · Answer 1 · answered Aug 11 '22 at 11:57

0

You can use the split function to do that:

let values = uuid.split("_");

answered Aug 11 '22 at 11:57

PiFanatic

233
1
4
14

score 0 · Accepted Answer · answered Aug 11 '22 at 11:59

0

You can get the same behavior in less lines of code, like this:

let uuid = "159as_ss_5be0lk875iou_.1345.332.11.2"
let values = uuid.split("_")[2];

answered Aug 11 '22 at 11:59

Rusu Dinu

477
2
5
16

score -1 · Answer 3 · answered Aug 11 '22 at 12:02

By using the split function, you can get separate the whole string into smaller parts:

const parts = uuid.split("_");

This will return the following array:

["159as", "ss", "5be0lk875iou", ".1345.332.11.2"]

From here, you can take the string at index 2, and split it again to receive an array of characters:

const values = parts[2].split("");

Get String Specific Characters

3 Answers3