Channel Directions
This Go code demonstrates the communication between two goroutines using channels. Let's go through it with inline comments:
Output
Explanation:
package main
: Indicates that this Go file belongs to the main executable package.import "fmt"
: Imports the "fmt" package for formatting and printing.func ping(pings chan<- string, msg string) { ... }
: Defines a functionping
that sends a message (msg
) to the provided channel (pings
). The channel is specified as a send-only channel (chan<- string
), meaning it can only be used for sending.func pong(pings <-chan string, pongs chan<- string) { ... }
: Defines a functionpong
that receives a message from one channel (pings
) and sends it to another channel (pongs
). The 'pings' channel is specified as a receive-only channel (<-chan string
), and the 'pongs' channel is specified as a send-only channel (chan<- string
).func main() { ... }
: The main function, where the execution of the program begins.pings := make(chan string, 1)
: Creates a buffered channel named 'pings' with a capacity of 1.pongs := make(chan string, 1)
: Creates a buffered channel named 'pongs' with a capacity of 1.ping(pings, "passed message")
: Calls theping
function to send the message "passed message" to the 'pings' channel.pong(pings, pongs)
: Calls thepong
function with the 'pings' and 'pongs' channels.fmt.Println(<-pongs)
: Receives and prints the final message from the 'pongs' channel. This demonstrates the successful communication between the two goroutines.
In summary, this code illustrates how two goroutines communicate by passing a message between them using channels. The channels are used to coordinate the flow of data between concurrent parts of the program.
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