Go Web Scraping Quick Start Guide

Channels

Channels are conduits through which goroutines can send and receive information. This sits at the core of the Go's concurrency model for sharing memory through communicating. Channels allow for goroutines to each other rather than trying to access the same information. Channels are also unidirectional, meaning that data can only flow in one direction, as shown in the following diagram:

If communication is needed in both directions, two channels will need to be used.

In our previous example using mutexes, multiple threads attempted to access the map containing the status of each website by creating a release lock. We can use channels ...