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Contents
module Ms
module Data
module_function
# Initializes a new simple data array.
def new_simple(unresolved_data)
Simple.new(unresolved_data)
end
# A Simple data array that lazily evaluates unresolved_data, and
# each member of unresolved_data using to_a:
#
# class LazyObject
# attr_reader :to_a
# def initialize(array)
# @to_a = array
# end
# end
#
# a = LazyObject.new([1,2,3])
# b = LazyObject.new([4,5,6])
# s = Ms::Data::Simple.new([a, b])
#
# s.unresolved_data # => [a, b]
# s.data # => []
# s[0] # => [1,2,3]
# s[1] # => [4,5,6]
# s.data # => [[1,2,3], [4,5,6]]
#
class Simple
# The underlying resolved data store.
attr_reader :data
# The underlying unresolved data store.
attr_reader :unresolved_data
def initialize(unresolved_data)
@data = []
@unresolved_data = unresolved_data
end
def [](index)
@data[index] ||= @unresolved_data.to_a[index].to_a
end
def resolve
0.upto(@unresolved_data.length - 1) do |index|
self[index]
end unless resolved?
self
end
def resolved?
@data.compact.length == @unresolved_data.length
end
end
end
end
Version data entries
17 entries across 17 versions & 2 rubygems