On Tuesday, 19 July 2022 at 17:14:19 UTC+1 agra...@googlemail.com wrote:
> hello,
> i am new to everything is new in programming-heaven. old-c-guy. and i
> thought it`s time to learn something most-modern ..
>
Welcome!
Go is a great language for old-c-guys (and girls). Go was, in fact mainly
invented by them...
You will have fun here...
>
>
> time.NewTicker( time.Second ) ok
> time.NewTicker( 5 * time.Second ) ok
> var n int = 5
> time.NewTicker( n * time.Second ) error : int * duration
> time.NewTicker( time.Duration(n) * time.Second ) ok : duration *
> duration [s^2] square-seconds ?
>
Yes, this bothers the inner Physicist in me too.
But you can only multiply numbers if they are of the same type...
>
>
> tick := time.NewTicker( time.Duration( math.rand.Intn(10) ) * time.Second
> )
>
> go func() { for { select {
> case <-done : return
> ,case tc := <-tick.C : **** tick ****
> }}}()
>
> this strategy gets the tick if it has already happend in past and this
> go-routine is active
> if it is suspended will it be notified as soon in either done or tick
> something is to read ?
>
Yes
>
>
> when i (later) write own code / interfaces / struct where inside is like
> in ticker the .C a channel, can i define something like an operator, so
> that the outer object acts like a channel
>
You want user defined operations - so you can define the implementation of
the <- operator on your type.
But we don't have this in Go.
You need to use methods. (Less syntactic sugar, but more clarity).
>
> type S struct {
> C chan time
> ..
> }
> s := S{C:make(chan time),..}
> s<-
> <-s
>
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