Of what use is 'lambda'???
kragen at dnaco.net
Wed Sep 27 11:01:12 CEST 2000
In article <8FBC626EAduncanrcpcouk at 126.96.36.199>,
Duncan Booth <duncan at rcp.co.uk> wrote:
>Call by name, for those that have been fortunate enough to escape it,
>allows you to give an expression as the argument to a function, but delays
>the evaluation of the expression until it is used. A typical example if
>python supported call-by-name might look like:
> [ Jensen's device variant ]
>Python, thankfully, returns 90 as the result. If it used call by name, it
>would return 45.
I wasn't around when call-by-name was a current reality instead of a
historical curiosity, but I'd be surprised if Jensen's device were
really a "typical" use.
<kragen at pobox.com> Kragen Sitaker <http://www.pobox.com/~kragen/>
Perilous to all of us are the devices of an art deeper than we ourselves
-- Gandalf the Grey [J.R.R. Tolkien, "Lord of the Rings"]
More information about the Python-list