Sha256: 8e2720aaa3f57fd106b64e6098cec1ce3fc7c639cf11d5ea3aa9190c2c221ec6
Contents?: true
Size: 930 Bytes
Versions: 4
Compression:
Stored size: 930 Bytes
Contents
class Enumerator
# Enumerate values produced from an initial state. The enumerator terminates when the next state is nil.
# @param state [Object] The initial state
# @yieldparam state [Object] the current state
# @yieldreturn [Array] a 2-element array containing the next value and the next state
def self.unfold(state)
raise 'block is required' unless block_given?
Enumerator.new do |y|
unless state.nil?
loop do
next_value, state = yield(state)
break if state.nil?
y << next_value
end
end
end
end
attr_accessor :__memo__, :__memo_instance__
def memoized
@__memo_instance__ ||= self.dup
inner = __memo_instance__
inner.__memo__ ||= []
Enumerator.new do |y|
i = 0
loop do
inner.__memo__ << inner.next while inner.__memo__.size <= i
y << inner.__memo__[i]
i += 1
end
end
end
end
Version data entries
4 entries across 4 versions & 1 rubygems