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chan.go
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chan.go
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package Chan
// It is just a typed Channel
type Chan[T any] <-chan T
func (c Chan[T]) List() (r []T) {
for v := range c {
r = append(r, v)
}
return
}
// After sending all your datas, you need to close(ch) manually.
//
// Or you can use Auto() which wiil run close(ch) automatic after f(ch) done.
func New[T any](f func(ch chan T)) Chan[T] {
ch := make(chan T)
go f(ch)
return ch
}
// Run close(ch) automatic after f(ch) done.
func Auto[T any](f func(ch chan T)) Chan[T] {
return New(func(ch chan T) {
defer close(ch)
f(ch)
})
}
// A Range(start, stop[, step]) function like python range()
func Range[T int | int64 | float64](stop T, options ...T) Chan[T] {
var start, step, alpha T = 0, 1, 1
switch len(options) {
case 2:
step = options[1]
fallthrough
case 1:
start = stop
stop = options[0]
}
if step < 0 {
alpha = -1
}
return New(func(c chan T) {
for i := start; (i-stop)*alpha < 0; i += step {
c <- i
}
close(c)
})
}
func Slice[T any](s []T) Chan[T] {
return New(func(c chan T) {
for i, l := 0, len(s); i < l; i++ {
c <- s[i]
}
close(c)
})
}
func Values[M ~map[K]V, K comparable, V any](m M) Chan[V] {
return New(func(c chan V) {
for _, v := range m {
c <- v
}
close(c)
})
}