An example of using the Addressable URI Templates. Couldn't find any other detailed gists. Most of these examples are just lifted from the Addressable specs.

addressable_templates.rb

# Addressable::Template#match
# Addressable::Template#variables
# {$1}                   where $1=reqvarname
# {$1=$2}                where $1=varname & $2=defvalue
# {-list|$1|$2,$3}       where $1=delim & $2=varname
# {-join|$1|$2=$3,$4=$5} where $1=delim & $2=varname & $3=value, etc
# {-prefix}
# {-suffix}

#E.G.
Addressable::Template.new("/{number}/").
  extract("/99/") == {"number" => "99"}

Addressable::Template.new("/{number}/{number}/").
  extract("/99.99/") == {"number" => "99"}

Addressable::Template.new("/{number}{-prefix|.|number}").
  extract("/99.99/") == {"number" => "99"}

Addressable::Template.new("/search/{-prefix|/|stuff}/").
    extract("/search/one/spacer/two/") ==
    {"stuff" => ["one", "spacer", "two"]}

Addressable::Template.new("/search/{-suffix|/|stuff}/").
    extract("/search/one/spacer/two/") ==
    {"stuff" => ["one", "spacer", "two"]}

Addressable::Template.new("/search/{-list|+|query}/").
  extract("/search/an+example+search+query/") ==
    { "query" => ["an", "example", "search", "query"] }

Addressable::Template.new("/search/?{-join|&|a,b,c}").
  extract("/search/?a=one&b=two&c=three") ==
    { "a" => "one", "b" => "two", "c" => "three" }

#Addressable::Template.new("/?email={-opt|bogus@bogus.com|test}").
#    extract("/?email=bob@sporkmonger.com") ==

#Addressable::Template.new("/?email={-opt|bogus@sporkmonger.com|test}").
#    extract("/?email=bob@sporkmonger.com") ==