update book code

eBook/examples/chapter_7/reslicing.go

@@ -1,17 +1,18 @@
-package main
-import "fmt"
-
-func main() {
-    slice1 := make([]int, 0, 10)
-    // load the slice, cap(slice1) is 10:
-    for i := 0; i < cap(slice1); i++ {
-        slice1 = slice1[0:i+1]
-        slice1[i] = i
-        fmt.Printf("The length of slice is %d\n", len(slice1))
-    }
-
-    // print the slice:
-    for i := 0; i < len(slice1); i++ {
-        fmt.Printf("Slice at %d is %d\n", i, slice1[i])
-    }
-}
+package main
+
+import "fmt"
+
+func main() {
+	//var slice1 []int = make([]int, 0, 10)
+	slice1 := make([]int, 0, 10)
+	// load the slice, cap(slice1) is 10:
+	for i := 0; i < cap(slice1); i++ {
+		slice1 = slice1[0:i+1] // reslice
+		slice1[i] = i
+		fmt.Printf("The length of slice is %d\n", len(slice1))
+	}
+	// print the slice:
+	for i := 0; i < len(slice1); i++ {
+		fmt.Printf("Slice at %d is %d\n", i, slice1[i])
+	}
+}