I don't think anybody has yet exploited the power of parameter default values
for defining recursive functions:
((fact=n=>n>1 ?n*fact(n-1):1)=>(fact))()
Allen
On Mar 17, 2013, at 7:39 AM, Axel Rauschmayer wrote:
> ;-)
>
> How about the following (about which I’m serious)?
>
> function defineRec(f) {
> return args => f(f, ...args);
> }
>
> let factorial = defineRec((me, n) => n <= 1 ? 1 : n * me(me, n-1))
>
>
> On Mar 17, 2013, at 14:33 , "Mark S. Miller" <[email protected]> wrote:
>
>> Just in case anyone does not realize that this thread is humorous,
>>
>> const factorial = n => n>1 ? n*factorial(n-1) : 1;
>>
>> Yes, you can't use this as an expression. So what? After this declaration
>> you can use factorial as an expression. Anonymous lambda expressions are a
>> wonderful things. But in actual development, I have never yet encountered a
>> recursive function I didn't want to name.
>>
>> Ok, and now back to our irregularly scheduled humor...
>>
>>
>>
>>
>> On Sun, Mar 17, 2013 at 6:19 AM, Kevin Smith <[email protected]> wrote:
>>
>>
>> Sorry arrow functions but this isn't a better JS.
>>
>> Bah. Arrow functions are a huge usability win for JS. Try them- you'll see!
>>
>> { Kevin }
>>
>>
>>
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>>
>>
>>
>>
>> --
>> Cheers,
>> --MarkM
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>
> --
> Dr. Axel Rauschmayer
> [email protected]
>
> home: rauschma.de
> twitter: twitter.com/rauschma
> blog: 2ality.com
>
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