Usefulness of the "not in" operator

[Alec Taylor]

As you see, this way of writing constants gives you much more poetic
freedom than in other programming languages.

On Tue, Oct 11, 2011 at 7:46 PM, Chris Angelico <rosuav at gmail.com> wrote:
> On Tue, Oct 11, 2011 at 7:28 PM, Nobody <nobody at nowhere.com> wrote:
>> It's useful insofar as it allows you to define "numbers" given nothing
>> other than abstraction and application, which are the only operations
>> available in the lambda calculus.
>>
>
> Heh. This is why mathematicians ALWAYS make use of previously-defined
> objects! In pure lambda calculus, constants are even more painful than
> in SPL[1]...
>
> ChrisA
> [1] http://shakespearelang.sourceforge.net/report/shakespeare/shakespeare.html#SECTION00045000000000000000
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