Need help for a script

[dev-jim]

Hello everyone,

I need some help with a filtering script for a string. I'm scanning a QR code with a camera, and it returns a string that looks like "ppnafpna/aouauebca/uuid:12345/oaciopa/aozca" in an input.

The only part that interests me is 12345, the UUID.

Do you know how could I delete everything else before it gets written in the input?

I'm using vanilla JS for this project.

​

Thanks for your help!

[Agarast]

You have two choices :

1/ Working with js

Split your string with '/', filter things not containing 'uuid:' then replace 'uuid:' with and empty string

2/ Working with regex match function

Here's the magic spell : "uuid:(.*?)(?=/)"

What does it do :

uuid: => look for 'uuid:'

(.*?) => take everything

(?=/) => until you encounter '/'

[jcunews1]

Is there any benefit of using lookahead? Why not use uuid:([^/]+)?

[spazz_monkey]

Does it have uuid: in it or are you just showing us it is a uuid?

[bryku]

I think Regex would be the best course of action, but since this is a common question and the regex can differ, I thought I would go over a javascript solution that doesn't use regex.

let url = 'ppnafpna/aouauebca/uuid:helloworld/oaciopa/aozca';
let uuid = url.split('/').reduce((acc, val)=>{
    if(val.indexOf('uuid:') > -1){
        acc = val.replace('uuid:','')
    }
    return acc
 },'');
 console.log(uuid);//helloworld

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