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# url_for()
 -  converts an internal URI to a web URI
 -  can take an absolute boolean as its second argument
 -  can take an absolute boolean as its second argument
# link_to()
 -  returns an HTML  tag
 -  can take an  option
 -  can take an  option
 -  can take a  option
 -  can take an  option
 -  takes the url as the link name if the first argument is empty
 -  includes CSRF token from BaseForm
# button_to()
 -  returns an HTML  tag
 -  returns an HTML  tag
 -  returns an HTML  tag
 -  returns an HTML  tag
 -  accepts options as string
 -  works with confirm option
 -  works with confirm and popup option
 -  includes CSRF token from BaseForm
 -  can take an object as its first argument if  method is defined
 -  can take an object as its first argument
# link_to_if()
 -  returns an HTML  tag if the condition is true
 -  returns an HTML  tag by default if the condition is false
 -  takes a  option
 -  removes  option (given as string) in true case
 -  removes  option (given as array) in true case
 -  returns an HTML  tag by default if the condition is false
 -  accepts link_to2 compatible usage
 -  accepts link_to2 compatible usage
# link_to_unless()
 -  returns an HTML  tag if the condition is false
 -  returns an HTML  tag by default if the condition is true
 -  accepts link_to2 compatible usage
 -  accepts link_to2 compatible usage
# public_path()
 -  returns the public path
 -  returns the public path if starting with slash
 -  returns the public path
# mail_to()
 -  creates a mailto a tag
 -  creates a mailto a tag
 -  can encode the email address
# mail_to test
 - mail_to with only given email works
 - mail_to with given email and title works
 - mail_to with encoding works
 -  works with given default values in array form
 -  works with given default values in string form
 -  works with given default value with spaces
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