Class: Datasets::Table

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/datasets/table.rb

Instance Method Summary collapse

Constructor Details

#initialize(dataset) ⇒ Table 



5
6
7
 
# File 'lib/datasets/table.rb', line 5

def initialize(dataset)
  @dataset = dataset
end

Instance Method Details

#[](name) ⇒ Object 



13
14
15
 
# File 'lib/datasets/table.rb', line 13

def [](name)
  columner_data[name.to_sym]
end

#each(&block) ⇒ Object 



9
10
11
 
# File 'lib/datasets/table.rb', line 9

def each(&block)
  columner_data.each(&block)
end

#fetch_values(*keys) ⇒ Object 



17
18
19
20
21
22
23
24
25
26
27
 
# File 'lib/datasets/table.rb', line 17

def fetch_values(*keys)
  data = columner_data
  keys.collect do |key|
    if data.key?(key)
      data[key]
    else
      raise build_key_error(key) unless block_given?
      yield(key)
    end
  end
end

#to_h ⇒ Object 



29
30
31
32
33
34
35
36
37
38
 
# File 'lib/datasets/table.rb', line 29

def to_h
  columns = {}
  @dataset.each do |record|
    record.to_h.each do |name, value|
      values = (columns[name] ||= [])
      values << value
    end
  end
  columns
end