Class: Census::DataSet

Inherits:
Object
  • Object
show all
Defined in:
lib/rboc/data.rb

Overview

A simple container object that proxies its query method to an underlying DataSetVintage object.

Instance Method Summary collapse

Constructor Details

#initialize ⇒ DataSet

Returns a new instance of DataSet.



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# File 'lib/rboc/data.rb', line 102

def initialize
  @vintages = {}
  @newest_vintage = 0
end

Instance Method Details

#[](vintage) ⇒ Object 



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# File 'lib/rboc/data.rb', line 117

def [](vintage)
  unless @vintages.keys.include? vintage
    raise ArgumentError, "Unknown vintage"
  end
  @vintages[vintage.to_i]
end

#add_vintage(v) ⇒ Object 



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# File 'lib/rboc/data.rb', line 107

def add_vintage(v)
  y = v.vintage
  @vintages[y] = v
  @newest_vintage = y if y > @newest_vintage
end

#query(q = Query.new) {|q| ... } ⇒ Object

Yields:

  • (q) 


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# File 'lib/rboc/data.rb', line 129

def query(q=Query.new)
  yield q if block_given?
  @vintages[@newest_vintage].query q
end

#query_raw(q = Query.new) {|q| ... } ⇒ Object

Yields:

  • (q) 


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# File 'lib/rboc/data.rb', line 124

def query_raw(q=Query.new)
  yield q if block_given?
  @vintages[@newest_vintage].query_raw q
end

#vintage_years ⇒ Object 



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# File 'lib/rboc/data.rb', line 113

def vintage_years
  @vintages.keys
end