Hello again good fellows :)
I have been trying to read up on regex especially when it comes to matching any repeating characters. What I am trying to do is find repetitions of 0A-9F that repeat themselves in 2 byte and 4 byte and 8 byte occurences. I have converted the hexadecimal to a literal string (eg - 0xaa 0xbb 0xcc 0xdd is $string aabbccdd11223344)
Here is a small example. Say for instance I have 64 bytes and I want to scan it for any repeating instances of hexadecimal characters between 0a-9f:

whats in the $string:
0a0a0a0a0b0b0a0a0c0c0c0c0c0c0c0c
1f1f2b2b2b2b3e3e7b7b7b7b7b7b7b7b
8f8f8f8f8f8f8f8f6c6c4b4b4b4b3f3f
9d9d0f0f0f0f0f0f0f0f3a3a2e2e2e2e

[download]
I am wanting it to match any repeating characters, the above is just an example. i will be working with files less than a few MB at most and i think i almost have it, but i am a little confused as how to setup the regex to accomplish this. This is what i have so far:

$string =~/\d{2,4,8}/\/[0-9a-fA-F]/;
or
$string =~/\w{2,4,8]/\/[0-9a-fA-F]/;

[download]

I am not sure how to setup the regular expression. I know the first part tells it to match digits of characters, but the way I have converted it it will print whatever is at the offset(0x1F2A will print as 1f2a in console), so I am pretty sure I need to be matching words.
All in all I want to be able to match any character that repeats itself in sets of 2 bytes/4 bytes/8 bytes. I feel that i am close, but still no cigar. Could anyone be so kind as to help me out just a little? :)

In reply to matching characters and numbers with regex by james28909

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