Question

I am reading one file using Ruby and I am able to filter out strings stored in fixed sized formats. But I want to filter variable size string which is left by me in the end using some regex or some other thing.

Right now I am scanning string with following line

s.scan(/(.{4})(.{4})(.{4})(.{4})(.{4})(.{4})(.{4})(.{4})(.{4})(.*)/).each do |f,g,h,i,j,k,l,m,n,p| 

but still want to filter this (. *) part of string by separating null terminated strings from it.
How can I do this?

Answer 1

I don’t really understand why your regex is the way it is, but \0 is a null byte used in the regex (or \x00 if you prefer hex codes). Basically:

"foo\x00bar".split(?\x00)
=> ["foo", "bar"]

"foo\x00bar" =~ /\0/
=> 3