How do I test if variable Name starts with Alphabet or not?

Hi,

I need to check if a variable "name" starts with a variable or not, how
do i do that?

Essential, i want to sort array of names alphabetically : i was using
names.sort_by{|c| "c['name']}

But if name has numerical or special characters, they score well in
sorting and are there in the beginning of the sorted list. But I want
those special names to be in the end. How do i do this? Please suggest

regards,
SG