how to check palindrome in ruby code example

Example: palindrome index explained in ruby

# Complete the palindromeIndex function below. def palindromeIndex(s)   # slen = s.length   splt = s.split('')    n = s.reverse   nsplt = n.split('')    if n == s     return -1   elsif n != s      splt.each do |p|                   if nsplt[p] != splt[p]         return p       end     end   else      return -1   end end