RegExp
In Ruby, Regular Expressions (shortened as RegExp), are used to describe and match patterns in strings. This functionality is housed in the Regexp
class.
Syntax
Regular expressions can be created in three ways:
# With / /regexp1 = /code/# With %r{ }regexp2 = %r{code}# With Regexp.new()regexp3 = Regexp.new("code")
Finding Patterns in Strings
To see if a given string matches a regular expression, use .match()
.
puts regexp1.match("codecademy") # Output: code
To test if there even was a match (true
or false
), use .match?()
:
puts regexp1.match?("codecademy") # Output: true