learn about go routines

1 files changed, 25 insertions, 0 deletions

diff --git a/check_websites.go b/check_websites.go
new file mode 100644
index 0000000..ad7b0e5
--- /dev/null
+++ b/check_websites.go
@@ -0,0 +1,25 @@
+package main
+
+type WebsiteChecker func(string) bool
+type result struct {
+	string
+	bool
+}
+
+func CheckWebsites(wc WebsiteChecker, urls []string) map[string]bool {
+	results := make(map[string]bool)
+	resultChannel := make(chan result)
+
+	for _, url := range urls {
+		go func(u string) {
+			resultChannel <- result{u, wc(u)}
+		}(url)
+	}
+
+	for i := 0; i < len(urls); i++ {
+		result := <-resultChannel
+		results[result.string] = result.bool
+	}
+
+	return results
+}