How to split on the first occurring letter in Ruby?

Question

ruby

How to split on the first occurring letter in Ruby?
For example, I have a string that contains the letter A 3 times.
string = 'sdfsdfsdadfgfdgfdgafdsfsd'
how can I split by letter number?
those.
what would work like this
sdfsdfsd dfgfdgfdgafdsfsd

Answer 1

s = 'sdfsdfsdadfgfdgfdgafdsfsd'
first, rem = s[0...s.index('a')], s[s.index('a')+1..-1]