Re: [Haskell-cafe] Performance of functional priority queues

On Monday 28 December 2009 17:11:14 Gautam bt wrote:

On Sat, Dec 26, 2009 at 12:49 AM, Svein Ove Aas wrote:

...

Lazyness can be considered to be a controlled form of mutation

Can someone explain why this is true (or link me to an explanation)?

Forcing the evaluating of a thunk replaces the unevaluated expression with the value it evaluates to. That is effectively in-place mutation. -- Dr Jon Harrop, Flying Frog Consultancy Ltd. http://www.ffconsultancy.com/?e