Hi,
On Monday, June 13, 2016 at 9:41:52 AM UTC-4, charr...@gmail.com wrote:
>
> for reference, here is the mymap()
>
> http://tsoh.host/test.html#8e4ae712
>
> it simply runs the callback on every slice member
>
I apologize; I didn't communicate my question well. Your map example
functions on a single type; is the implementation *restricted* to a single
type? In a given scope, do all instances of "*" have to refer to the same
type, or can it refer to multiple types? If the latter, how do you ensure
type safety? How does this work:
// Given:
func map(f(*), a []*, result []*) {
for i, k := range a {
result[i] = f(k)
}
}
map(len, []*string{"a","aa","aaa"}, make([]*int, 3)) // Is this possible?
map(strconv.Itoa, []*int{1,2,3}, make([]*string, 3)) // once more, for
profit
map(strconv.Itoa, []*int{"a"}, make([]*float, 1)) // Is this a runtime
error?
Note these wouldn't work because the stdlib functions don't work on
pointers, which is an unfortunate limitation. It would necessitate
wrapping (nearly) every stdlib function that you wanted to use with this.
I left out the wrappers for brevity, and yes, I'm throwing away the
results. Just trying to head off the pedants.
I'm unable to use your playground at the moment; I'm getting an "error
communicating with remote server," so I can't test what happens.
--- SER
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