Merge pull request #105 from devlights/issue-#103

Add minmax example ( close #103 )

Author: devlights

basic/math_/minmax.go

@@ -0,0 +1,29 @@
+package math_
+
+import (
+	"fmt"
+	"math"
+)
+
+type mm struct {
+	min, max interface{}
+}
+
+// MinMaxは各数値型の最小値と最大値を表示するサンプルです
+func MinMax() error {
+
+	// 各数値型の最小値と最大値は math パッケージに定義されている
+	// Floatのみ、MinXXではなくて SmallestNonzeroFloatXX となる
+	m := map[string]*mm{
+		"Int8":  {min: math.MinInt8, max: math.MaxInt8},
+		"Int16": {min: math.MinInt16, max: math.MaxInt16},
+		"Int32": {min: math.MinInt32, max: math.MaxInt32},
+		"Int64": {min: math.MinInt64, max: math.MaxInt64},
+	}
+
+	for k, v := range m {
+		fmt.Printf("%v Min[%v] Max[%v]\n", k, v.min, v.max)
+	}
+
+	return nil
+}

lib/mapping.go

@@ -17,6 +17,7 @@ import (
 	"github.com/devlights/try-golang/basic/io_"
 	"github.com/devlights/try-golang/basic/iota_"
 	"github.com/devlights/try-golang/basic/map_"
+	"github.com/devlights/try-golang/basic/math_"
 	"github.com/devlights/try-golang/basic/os_"
 	"github.com/devlights/try-golang/basic/runtime_"
 	"github.com/devlights/try-golang/basic/scope"
@@ -87,4 +88,5 @@ func (m SampleMapping) MakeMapping() {
 	m["function_multi_return_value"] = functions.FunctionMultiReturnValue
 	m["function_named_return_value"] = functions.FunctionNamedReturnValue
 	m["type01"] = type_.Type01
+	m["minmax"] = math_.MinMax
 }