DZone Snippets: Danger's Code Snippets

Convert an array to a hash

danger (Danger) — Wed, 14 Jun 2006 21:54:14 GMT

Pretty simple, but maybe not intuitive



class Array

  def to_h

    Hash[*self]

  end

end

Use it like this:



['action', 'go', 'id', 6].to_h   # => { 'action' => 'go', 'id' => 6 }

Count Values in an Array

danger (Danger) — Wed, 14 Jun 2006 21:52:35 GMT

This modifies the Array class to allow for easy summing



class Array

  def total

    t = 0

    self.each { |v| t += v }

    t

  end

end

Use it like this:



[1,2,2,3].total  # => 8

link_to_remote_unless_current

danger (Danger) — Wed, 14 Jun 2006 09:53:44 GMT

// Full discussion about this available at:
// http://6brand.com/articles/2006/06/07/link_to_remote_unless_current



# throw this in one of your controller helpers.

# it works just like a combination of link_to_unless_current and link_to_remote

def link_to_remote_unless_current(name, options = {}, html_options = {}, *parameters_for_method_reference, &block)

  if current_page?(options[:url])

    if block_given?

      block.arity <= 1 ? yield(name) : yield(name, remote_function(options), html_options, *parameters_for_method_reference)

    else

      name

    end

  else

    link_to_function(name, remote_function(options), html_options)

  end

end