= DEPRECATION WARNING Please do not use this gem. It has long been surpassed by other, better memoization gems like memoizable and memoist.

= Description A method that speeds methods up at the cost of memory (or disk space).

= Installation gem install memoize

= Synopsis require 'memoize' include Memoize

Inefficient fibonacci method

def fib(n) return n if n < 2 fib(n-1) + fib(n-2) end

fib(100) # Slow

memoize(:fib) fib(100) # Fast

Or store the cache to a file for later use

memoize(:fib, "fib.cache") fib(100) # Fast

= Constants Memoize::MEMOIZE_VERSION Returns the version of this package as a String.

= Methods Memoize#memoize(method, file=nil) Takes a +method+ (symbol) and caches the results of +method+ in a hash table. If you call +method+ again with the same arguments, memoize gives you the value from the table instead of letting the method compute the value again.

If +file+ is provided, the results are cached to that file. Note that this uses Marshal internally. Beware of changes in the Marshal format should you happen to upgrade.

Returns the cache, which you can inspect or manipulate directly if you are so inclined.

= Acknowledgements Code borrowed from Nobu Nakada (ruby-talk:155159). Code borrowed from Ara Howard (ruby-talk:173428). Code borrowed from Andrew Johnson (http://tinyurl.com/8ymx8) Ideas taken from Brian Buckley and Sean O'Halpin. Tiny URL provided for Andrew Johnson because I could not find the ruby-talk reference. The gateway may have been broken at the time.

= Alternatives

• memoist by Joshua Peek et al.
• memoizable from James Edward Gray
• simple_memoize from Jack Canty

Running "gem search -r memoize" will list more alternatives.

== Known Issues This library is deprecated. I will no longer support it, and will eventually yank it from the gem index.

== License Artistic 2.0

== Warranty This package is provided "as is" and without any express or implied warranties, including, without limitation, the implied warranties of merchantability and fitness for a particular purpose.

== Copyright (C) 2005-2014 Daniel J. Berger All Rights Reserved

= Author Daniel J. Berger