Add more example tests for Drop, Take and Collect

Author: BooleanCat

iter/drop_test.go

@@ -11,6 +11,12 @@ import (
 )
 
 func ExampleDrop() {
+	counter := iter.Drop[int](iter.Count(), 2)
+	fmt.Println(counter.Next().Unwrap())
+	// Output: 2
+}
+
+func ExampleDrop_method() {
 	counter := iter.Count().Drop(2)
 	fmt.Println(counter.Next().Unwrap())
 	// Output: 2

iter/iter_test.go

@@ -12,6 +12,11 @@ import (
 )
 
 func ExampleCollect() {
+	fmt.Println(iter.Collect[int](iter.Count().Take(3)))
+	// Output: [0 1 2]
+}
+
+func ExampleCollect_method() {
 	fmt.Println(iter.Count().Take(3).Collect())
 	// Output: [0 1 2]
 }

iter/take_test.go

@@ -10,6 +10,17 @@ import (
 )
 
 func ExampleTake() {
+	iter := iter.Take[int](iter.Count(), 2)
+	fmt.Println(iter.Next())
+	fmt.Println(iter.Next())
+	fmt.Println(iter.Next())
+	// Output:
+	// Some(0)
+	// Some(1)
+	// None
+}
+
+func ExampleTake_method() {
 	iter := iter.Count().Take(2)
 	fmt.Println(iter.Next())
 	fmt.Println(iter.Next())