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Versions: 8
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Contents
module Paraduct
class VariableConverter
# @param variables [Hash{String => Array<String>}] Key: variable name, Value: values_pattern which you want to product
# @return [Array<Hash{String => String}>]
def self.product(variables)
return [] if variables.empty?
values_patterns = product_array(variables.values)
product_variables = []
values_patterns.each do |values_pattern|
entry = {}
keys = variables.keys.to_enum
values = values_pattern.to_enum
loop do
key = keys.next
value = values.next
entry[key] = value
end
product_variables << entry
end
product_variables
end
def self.reject(product_variables, exclude_variables)
product_variables.inject([]) do |rejected_product_variables, variables|
rejected_product_variables << variables unless exclude_variables.any?{ |exclude| partial_match?(variables, exclude) }
rejected_product_variables
end
end
def self.partial_match?(parent_hash, child_hash)
child_hash.each do |k, v|
return false unless parent_hash[k] == v
end
true
end
def self.product_array(array)
first_values = array.shift
if array.empty?
first_values.product
else
first_values.product(*array)
end
end
private_class_method :product_array
end
end
Version data entries
8 entries across 8 versions & 1 rubygems