module Roda::RodaPlugins::RenderEach::InstanceMethods

def render_each(enum, template, opts=OPTS)

set a local variable. If not set, uses the template name.
inside the template. An explicit +nil+ value does not
:local :: The local variable to use for the current enum value
Additional options supported:
given opts. The template and options hash are passed to +render+.
For each value in enum, render the given template using the 
def render_each(enum, template, opts=OPTS)
  if as = opts.has_key?(:local)
    as = opts[:local]
  else
    as = template.to_s.to_sym
  end
  if as
    opts = opts.dup
    if locals = opts[:locals]
      locals = opts[:locals] = locals.dup
    else
      locals = opts[:locals] = {}
    end
  end
  enum.map do |v|
    locals[as] = v if as
    render_template(template, opts)
  end.join
end