Get specific letters between two symbols

Question

I'm trying to get the letters between two specified symbols.

Example

var a = 'Testing code https://example.com/ABC-BAC tralala';  // I would need to get ABC
var b = 'Depends on x \n https://example.com/CADER-BAC';  // I would need to get CADER
var c ='lots of examples: \n example.com/CAB-BAC'; // I would need to get CAB

var d ='lots of examples: \n https://abc.example.com/CAB-BAC'; // I would need to get CAB

My main problem is that I need a unique syntax that would work for both https:// version or without any https://, therefore using indexOf on '/' wouldn't work that well.

I've tried regex but of course, that only fits one solution:

 let regex = /^https://example\.com/[a-zA-Z]+-BAC$/i;
 return regex.test(input);

Any help is appreciated, thank you!

@Glubus My knowledge on regex is way too limited for this unfortunately, I've tried that in the begining — johnnasx, Apr 19 '21 at 11:20
Does this answer your question? [Get Substring between two characters using javascript](https://stackoverflow.com/questions/14867835/get-substring-between-two-characters-using-javascript) — Lars Flieger, Apr 19 '21 at 11:25
Where are these strings coming from? Are they in `` elements on your page, text..? — David Thomas, Apr 19 '21 at 11:39
they are simple strings, not html elements. I'm writing some code for a node.js server — johnnasx, Apr 19 '21 at 11:40

score 1 · Accepted Answer · answered Apr 19 '21 at 11:23

1

You may use match here:

var input = "https://example.com/CADER-BAC";
var code = input.match(/^.*\/([^-]+)-.*$/);
console.log(code[1]);

answered Apr 19 '21 at 11:23

Tim Biegeleisen

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`input.match(/^.*\/([^-]+)-.*$/);` - and what is this dark, magical string? Bear in mind the OP's statement: "*My knowledge on regex is way too limited for this unfortunately...*" – David Thomas Apr 19 '21 at 11:38
The current code works for that simple url but will not work for preceding words or \n before the actual url, please see the edited question. – johnnasx Apr 19 '21 at 11:42
I made it work for precending words by removing ^ . Thank you for your initial answer. – johnnasx Apr 19 '21 at 11:46

score 1 · Answer 2 · answered Apr 19 '21 at 11:30

You can use str.substring in combination of str.lastIndexOf:

const a = 'Testing code https://example.com/ABC-BAC tralala'; // I would need to get ABC
const b = 'Depends on x \n https://example.com/CADER-BAC'; // I would need to get CADER
const c = 'lots of examples: \n example.com/CAB-BAC'; // I would need to get CAB

const getSubstring = (str) => {
  return str.substring(
    str.lastIndexOf('example.com/') + 'example.com/'.length,
    str.lastIndexOf('-'))
}

console.log(getSubstring(a), getSubstring(b), getSubstring(c))

Get specific letters between two symbols

2 Answers2