On Tue, Aug 11, 2015 at 1:49 PM, Jacob Parker <[email protected]> wrote:
> I did look, but couldn’t find anything on named arrow functions were not
> included. I do sometimes find cases where I want recursion inside a class
> function definition, and still need access to `this`. Was it just seen as
> syntax bloat, or were there any complications to implementing it?
>
> Obviously a contrived example, but something like this (using do syntax too)
>
> x.map(factorial(x) => do {
> if (x <= 1) {
> 1;
> } else {
> x * factorial(x - 1)
> }
> });
Probably not super-helpful in practice, but there's always the Y-combinator. ^_^
let Y = F => (x=>F(y=>(x(x))(y)))(x=>F(y=>(x(x))(y)));
x.map(Y(fact=>x=> do {
if( x <= 1) {
1;
} else {
x * fact(x-1);
}
));
Here, the syntax "Y(foo=>" indicates a "named" arrow function.
~TJ
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