Example #8: IndexOf and LastIndexOf methods

lesson7/lazy_streams/08_index_of.go

@@ -0,0 +1,45 @@
+package main
+
+import (
+	"fmt"
+	"github.com/wesovilabs/koazee"
+)
+
+func main() {
+	values := []int{1, 2, 3, 4, 5, 1}
+	fmt.Printf("input: %v\n", values)
+
+	stream := koazee.StreamOf(values)
+
+	i1, _ := stream.IndexOf(1)
+	fmt.Printf("index of 1: %v\n", i1)
+
+	i2, _ := stream.LastIndexOf(1)
+	fmt.Printf("last index of 1: %v\n", i2)
+
+	i3, _ := stream.IndexOf(42)
+	fmt.Printf("index of 42: %v\n", i3)
+
+	fmt.Println()
+
+	words := []string{"one", "two", "three", "four", "five"}
+	fmt.Printf("words: %v\n", words)
+
+	stream = koazee.StreamOf(words)
+
+	i4, _ := stream.IndexOf("one")
+	fmt.Printf("index of 'one': %v\n", i4)
+
+	i5, _ := stream.LastIndexOf("two")
+	fmt.Printf("last index of 'one': %v\n", i5)
+
+	i6, e6 := stream.IndexOf("foobar")
+	fmt.Printf("index of 'foobar': %v\n", i6)
+	fmt.Printf("error: %v\n", e6)
+
+	fmt.Println()
+
+	i7, e7 := stream.IndexOf(42)
+	fmt.Printf("index of 42: %v\n", i7)
+	fmt.Printf("error: %v\n", e7)
+}