On 22/05/2009 3:02 PM, Barry Rowlingson wrote:
On Fri, May 22, 2009 at 6:04 PM, Duncan Murdoch <murd...@stats.uwo.ca> wrote:
Putting force(xl); force(yl) into your interpOne definition (so they get
executed when interpOne is called, not just when the returned function is
called) should work.
*sigh* yes, that looks like it. The help for "force" gives a more
concise example. What I'd posted was actually a cut-down version of my
original problem!
I've not tested it yet, but other things I'd tried had removed the
bug without me understanding why - such as reassinging the args to
interpOne inside the function.
Do any other languages work like this?
According to Wikipedia (http://en.wikipedia.org/wiki/Lazy_evaluation),
functional languages tend to do this; examples they give are Haskell,
Miranda, and it's optional in Scheme and Ocaml.
Duncan Murdoch
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