Concise Memoization
Thursday November 10 2005, 01:03 PM
Doug Landauer comments on using Hash default blocks for memoization, and comments that the Memoize module could be made simpler.
I’ll take a stab. Check this:
module Memoize
def memoize( name )
meth = method( name )
cache = Hash.new { |cache, args|
cache[args] = meth.call( *args )
}
( class << self ; self ; end ).class_eval do
define_method( name ) { |*args| cache[args] }
end
cache
end
endMaybe not shorter, but I daresay a little clearer.