class Array

Extensions to Arrays in support of variable length lists of field names. This is not pretty, but supports DSL features like:

group_by 'field1', 'field2', :sort_by => 'field3' do
  ...
end

The most obvious limitation of the approach is that function definitions of the form f(*args_with_options) are not self-documenting. To compensate for this, documentation of all arguments and optional parameters must be provided on the DSL method.

Public Instance Methods

extract_options() click to toggle source

Non-destructive form of #extract_options!

# File lib/cascading/ext/array.rb, line 23
def extract_options
   last.is_a?(::Hash) ? last : {}
end

extract_options!() click to toggle source

Use this extension to extract the optional parameters from a *args_with_options argument. So if you have a function:

def f(*args_with_options)

You can destructively process the args_with_options as follows:

options, just_args = args_with_options.extract_options!, args_with_options

# File lib/cascading/ext/array.rb, line 18
def extract_options!
   last.is_a?(::Hash) ? pop : {}
end