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changed Map implementation to not preserve input order. MapPreserveOrder implemented

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This commit is contained in:
milarin 2023-03-06 12:55:24 +01:00
parent f0a869b409
commit ac5678bde6
1 changed files with 30 additions and 7 deletions
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37
map.go
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@ -1,13 +1,13 @@
package channel
// Map applies mapper to all I's coming from in and sends their return values to out while preserving input order.
// MapPreserveOrder applies mapper to all I's coming from source and sends their return values to out while preserving input order.
// All mappings will be done as concurrently as possible using as many threads as there are CPU cores
func Map[I, O any](source <-chan I, mapper func(I) O) (out <-chan O) {
return MapWithRunner(source, getDefaultRunner(), mapper)
func MapPreserveOrder[I, O any](source <-chan I, mapper func(I) O) (out <-chan O) {
return MapPreserveOrderWithRunner(source, getDefaultRunner(), mapper)
}
// MapWithRunner behaves like Map but uses runner to spawn its routines
func MapWithRunner[I, O any](source <-chan I, runner Runner, mapper func(I) O) <-chan O {
// MapPreserveOrderWithRunner behaves like MapPreserveOrder but uses runner to spawn its routines
func MapPreserveOrderWithRunner[I, O any](source <-chan I, runner Runner, mapper func(I) O) <-chan O {
out := make(chan O, cap(source))
outchannels := make(chan chan O, cap(source))
@ -39,8 +39,31 @@ func MapWithRunner[I, O any](source <-chan I, runner Runner, mapper func(I) O) <
return out
}
// MapSuccessive applies mapper to all I's coming from in and sends their return values to out while preserving input order.
// All mappings will be done successively
// Map applies mapper to all I's coming from source and sends their return values to out.
// All mappings will be done as concurrently as possible using as many threads as there are CPU cores
func Map[I, O any](source <-chan I, mapper func(I) O) <-chan O {
return MapWithRunner(source, getDefaultRunner(), mapper)
}
// MapWithRunner behaves like Map but uses runner to spawn its routines
func MapWithRunner[I, O any](source <-chan I, runner Runner, mapper func(I) O) <-chan O {
out := make(chan O, cap(source))
go func() {
defer close(out)
for value := range source {
value := value
runner.Run(func() {
out <- mapper(value)
})
}
}()
return out
}
// MapSuccessive applies mapper to all I's coming from source and sends their return values to out while preserving input order.
// All mappings will be done successively in a single thread
func MapSuccessive[I, O any](source <-chan I, mapper func(I) O) <-chan O {
out := make(chan O, cap(source))