How can I test whether a string only contains characters in a given set? [duplicate]
Given a string of a mobile phone number, I need to make sure that the given string only contains digits 0-9
, (
,)
,+
,-
,x
, and space. How can I do it in Ruby?
Use:
/^[-0-9()+x ]+$/
E.g.:
re = /^[-0-9()+x ]+$/
match = re.match("555-555-5555")
if (/^[-\d()\+x ]+$/.match(variable))
puts "MATCH"
else
puts "Does not MATCH"
end
Use String#count:
"+1 (800) 123-4567".count("^0-9+x()\\- ").zero? # => true
"x invalid string x".count("^0-9+x()\\- ").zero? # => false
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