regex - How do I check if a string has at least one number in it using Ruby?

Question

I need to check to see if a string contains at least one number in it using Ruby (and I assume some sort of regex?).

How would I do that?

Answer 1

You can use the String class's =~ method with the regex /d/ as the argument.

Here's an example:

s = 'abc123'

if s =~ /d/         # Calling String's =~ method.
  puts "The String #{s} has a number in it."
else
  puts "The String #{s} does not have a number in it."
end