Initial import

internal/stringutil/iter.go

@@ -0,0 +1,23 @@
+package stringutil
+
+import "sort"
+
+func MapKeys(m map[string]string) <-chan string {
+	ch := make(chan string)
+	if m == nil {
+		close(ch)
+	} else {
+		go func(ch chan<- string) {
+			defer close(ch)
+			keys := make([]string, 0, len(m))
+			for k := range m {
+				keys = append(keys, k)
+			}
+			sort.Strings(keys)
+			for _, k := range keys {
+				ch <- k
+			}
+		}(ch)
+	}
+	return ch
+}