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<article> | |
<h2>Go mode</h2> | |
<form><textarea id="code" name="code"> | |
// Prime Sieve in Go. | |
// Taken from the Go specification. | |
// Copyright © The Go Authors. | |
package main | |
import "fmt" | |
// Send the sequence 2, 3, 4, ... to channel 'ch'. | |
func generate(ch chan<- int) { | |
for i := 2; ; i++ { | |
ch <- i // Send 'i' to channel 'ch' | |
} | |
} | |
// Copy the values from channel 'src' to channel 'dst', | |
// removing those divisible by 'prime'. | |
func filter(src <-chan int, dst chan<- int, prime int) { | |
for i := range src { // Loop over values received from 'src'. | |
if i%prime != 0 { | |
dst <- i // Send 'i' to channel 'dst'. | |
} | |
} | |
} | |
// The prime sieve: Daisy-chain filter processes together. | |
func sieve() { | |
ch := make(chan int) // Create a new channel. | |
go generate(ch) // Start generate() as a subprocess. | |
for { | |
prime := <-ch | |
fmt.Print(prime, "\n") | |
ch1 := make(chan int) | |
go filter(ch, ch1, prime) | |
ch = ch1 | |
} | |
} | |
func main() { | |
sieve() | |
} | |
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