Merge pull request #99 from devlights/add-reverse-func

Add slice reverse example

Author: devlights

basic/slice_/slice_reverse.go

@@ -0,0 +1,57 @@
+package slice_
+
+import "fmt"
+
+func reverseInts(s []int) {
+
+	var (
+		first = 0
+		last  = len(s) - 1
+	)
+
+	for first < last {
+		s[first], s[last] = s[last], s[first]
+		first++
+		last--
+	}
+}
+
+func reverseStrs(s []string) {
+
+	var (
+		first = 0
+		last  = len(s) - 1
+	)
+
+	for first < last {
+		s[first], s[last] = s[last], s[first]
+		first++
+		last--
+	}
+}
+
+func SliceReverse() error {
+
+	var (
+		ints = []int{
+			1, 2, 3, 4, 5,
+		}
+
+		strs = []string{
+			"hello", "world",
+		}
+
+		f = func(i []int, s []string) {
+			fmt.Printf("[original]\tints[%v]\tstrs[%v]\n", ints, strs)
+		}
+	)
+
+	f(ints, strs)
+
+	reverseInts(ints)
+	reverseStrs(strs)
+
+	f(ints, strs)
+
+	return nil
+}

lib/mapping.go

@@ -68,6 +68,7 @@ func (m SampleMapping) MakeMapping() {
 	m["slice03"] = slice_.Slice03
 	m["slice04"] = slice_.Slice04
 	m["slice05"] = slice_.Slice05
+	m["slice_reverse"] = slice_.SliceReverse
 	m["comment01"] = comments.Comment01
 	m["closure01"] = closure.Closure01
 	m["string01"] = string_.String01