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| -rw-r--r-- | railties/guides/source/active_support_overview.textile | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/railties/guides/source/active_support_overview.textile b/railties/guides/source/active_support_overview.textile index 290b1e441e..abb7ca9491 100644 --- a/railties/guides/source/active_support_overview.textile +++ b/railties/guides/source/active_support_overview.textile @@ -1609,6 +1609,19 @@ Regexp.optionalize('...') # => '(?:...)?' This method is also used by the routing system, it helps in building optional regexp segments. +h4. +unoptionalize(pattern)+ + +The class method +unoptionalize+ is the inverse of +optionalize+ for optional regexps, and the identity for the rest: + +<ruby> +Regexp.unoptionalize('') # => '' +Regexp.unoptionalize('.?') # => '.' +Regexp.unoptionalize('(?:...)?') # => '...' +Regexp.unoptionalize('\A\w+\z') # => '\A\w+\z' +</ruby> + +This method is also used in the routes code for building regexps. + h3. Extensions to +Range+ ... |