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Contents
module Eco
module Data
class Mapper
# it expects [[v1a, v1b], [v2a, v2b] ...]
def initialize (array_of_arrays = [], internal: :last)
@source = array_of_arrays
if @source
# internal should be always last in @source
@source = @source.map { |a| a.reverse } unless internal == :last
# first declarations take priority
@by_external = @source.reverse.to_h
@by_internal = @source.reverse.map do |pair|
pair.reverse
end.to_h
end
end
def list(type = :internal)
return [] if !@source
@source.map do |pair|
type == :internal ? pair.last : pair.first
end.uniq
end
def internal?(value)
return true if !@source
@by_internal.key?(value)
end
def external?(value)
return true if !@source
@by_external.key?(value)
end
def include?(value)
return true if !@source
internal?(value) || external?(value)
end
def to_internal(value)
return value if !@source
@by_external[value]
end
def to_external(value)
return value if !@source
@by_internal[value]
end
end
end
end
Version data entries
46 entries across 46 versions & 1 rubygems