Rep-string: Difference between revisions

Given a series of ones and zeroes in a string, define a repeated string or ''rep-string'' as a string which is created by repeating a substring of the ''first'' N characters of the string ''two or more times, truncated on the right to the length of the input string''.

For example, the string <code>'10011001100'</code> is a repeated rep-string as the leftmost four characters of <code>'1001'</code> are repeated three times and truncated on the right to give the original string.

* Write a function/subroutine/method/... that takes a string and returns an indication of if it is a repeated rep-string and the repeated string. (Either the string that is repeated, or the number of repeated characters would suffice).