Question

Possible Duplicate:
How to split string into array as integers

I have a “3×2” string.

How can I constrain with regex to cover these validations:

1. validate presence of first number
2. validates that there’s a “x” and only one.
3. validate the presence of the second number.

Answer 1

three_by_two = /\A\d{3}x\d{2}\z/
if my_str =~ three_by_two

Decoded:

• Start at the beginning of the string
• 3 digits
• a literal x
• 2 digits
• The end of the string