class Pry::Config::MemoizedValue

@see Pry::Config::LazyValue
@since v0.13.0
@api private
value.call # => 20
value.call # => 20
value.call # => 20
value = Pry::Config::MemoizedValue.new { num += 1 }
num = 19
@example
result.
configuration value. Subsequent ‘#call` calls return the same memoized
MemoizedValue is a Proc (block) wrapper. It is meant to be used as a

def call 

def call
  return @call if @called
  @called = true
  @call = @block.call
end

def initialize(&block) 

def initialize(&block)
  @block = block
  @called = false
  @call = nil
end