Javascript Question posted in
A very good W3school tutorial can be found here.

Javascript – How to split a hex string into individual bytes?

I am trying to split a hexadecimal string, 3E8.8F5C28F5C28, into individual bytes. I tried the following code to split the string:

const string = "3E8.8F5C28F5C28";
const res = string.split(/([dw]{2})/).filter(e => e);

But it gave me this result:

[
  '3E', '8.', '8F',
  '5C', '28', 'F5',
  'C2', '8'
]

I need to split the given hex string like 03 E8 8F. I don’t want the fractional values after 8F.

How to achieve this?

Tags:

2

Answers


  1. 0

    It’s an easy task do it like this:

    const string = "3E8.8F5C28F5C28";
// Remove the fractional part
const sanitizedString = string.split(".")[0];
const result = sanitizedString.padStart(sanitizedString.length + (sanitizedString.length % 2), '0').match(/.{1,2}/g) || [];
console.log(result);
    Login or Signup to reply.
  2. 0

    You could first pad the string so it has an even number of hex digits in both the integer as fractional parts. Then clip the fractional part to just 2 digits, and finally match all digit pairs.

    const string = "3E8.8F5C28F5C28";
const res = string
     .replace(/(ww)*wb/, "0$&")  // Pad integer part  
     .replace(/b(ww)*w$/, "$&0") // Pad fractional part
     .replace(/(.ww).*/, "$1")    // Keep at most 2 decimals
     .match(/ww/g);                // Get hex pairs
     
console.log(res);
    Login or Signup to reply.
Please signup or login to give your own answer.

Back To Top
Search