Class: Tabler::CSV

Inherits:
Object
  • Object
show all
Defined in:
lib/tabler/csv.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(data) ⇒ CSV

Returns a new instance of CSV.



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# File 'lib/tabler/csv.rb', line 7

def initialize(data)
  @data = data
end

Instance Attribute Details

#data ⇒ Object (readonly)

Returns the value of attribute data.



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# File 'lib/tabler/csv.rb', line 5

def data
  @data
end

Instance Method Details

#generate(opts = {}) ⇒ Object Also known as: to_csv, to_s

Create a csv string from the data



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# File 'lib/tabler/csv.rb', line 13

def generate(opts={})
  nd = normalized_data
  ::CSV.generate(opts) do |csv|
    # set header row
    csv << nd[:headers]
    nd[:values].each do |row|
      csv << row
    end
  end
end

#normalized_data ⇒ Object

Creates a hash with a :headers field and a :values field



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# File 'lib/tabler/csv.rb', line 30

def normalized_data
  result = { :headers => [], :values => [] }

  data.each do |row|
    values = []
    row.each do |key,val|
      # add the header field if needed
      result[:headers] << key unless result[:headers].include?(key)

      # build the values array
      index_of_header = result[:headers].index(key)
      values[index_of_header] = val
    end
    result[:values] << values
  end
  result
end