Class: Quandl::Format::Dataset::Dump

Inherits:
Object
  • Object
show all
Defined in:
lib/quandl/format/dataset/dump.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(r) ⇒ Dump

Returns a new instance of Dump.



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# File 'lib/quandl/format/dataset/dump.rb', line 17

def initialize(r)
  self.record = r
end

Instance Attribute Details

#record ⇒ Object

Returns the value of attribute record.



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# File 'lib/quandl/format/dataset/dump.rb', line 15

def record
  @record
end

Class Method Details

.collection(*args) ⇒ Object 



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# File 'lib/quandl/format/dataset/dump.rb', line 5

def collection(*args)
  Array(args).flatten.collect{|r| record(r) }.join("\n")
end

.record(record) ⇒ Object 



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# File 'lib/quandl/format/dataset/dump.rb', line 9

def record(record)
  self.new(record).to_qdf
end

Instance Method Details

#column_names ⇒ Object 



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# File 'lib/quandl/format/dataset/dump.rb', line 40

def column_names
  record.column_names.to_csv if record.column_names.present?
end

#data ⇒ Object 



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# File 'lib/quandl/format/dataset/dump.rb', line 33

def data
  data = record.data
  data = data.collect(&:to_csv).join if data.is_a?(Array) && data.first.respond_to?(:to_csv)
  data = data.to_csv if data.respond_to?(:to_csv)
  data
end

#meta_attributes ⇒ Object 



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# File 'lib/quandl/format/dataset/dump.rb', line 29

def meta_attributes
  record.meta_attributes.stringify_keys.to_yaml[4..-1] + "-\n"
end

#to_qdf ⇒ Object 



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# File 'lib/quandl/format/dataset/dump.rb', line 21

def to_qdf
  [ 
    meta_attributes,
    column_names,
    data
  ].compact.join
end