feat：开发新的方法 (#74)

ExtractKeys 切片字段提取
SliceToMap 切片转map

sliceUtil/slice_to_map_test.go

@@ -0,0 +1,62 @@
+package sliceUtil
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestSliceToMap(t *testing.T) {
+	// Test case 1: Test with a slice of Person structs
+	type Person struct {
+		ID   int
+		Name string
+	}
+
+	people := []Person{
+		{ID: 1, Name: "Alice"},
+		{ID: 2, Name: "Bob"},
+		{ID: 3, Name: "Charlie"},
+	}
+
+	keyFunc := func(p Person) int {
+		return p.ID
+	}
+
+	expected := map[int]Person{
+		1: {ID: 1, Name: "Alice"},
+		2: {ID: 2, Name: "Bob"},
+		3: {ID: 3, Name: "Charlie"},
+	}
+
+	result := SliceToMap(people, keyFunc)
+
+	if !reflect.DeepEqual(result, expected) {
+		t.Errorf("Test case 1 failed. Expected %v, got %v", expected, result)
+	}
+
+	// Test case 2: Test with an empty slice
+	emptySlice := []Person{}
+	expectedEmpty := map[int]Person{}
+
+	resultEmpty := SliceToMap(emptySlice, keyFunc)
+
+	if !reflect.DeepEqual(resultEmpty, expectedEmpty) {
+		t.Errorf("Test case 2 failed. Expected %v, got %v", expectedEmpty, resultEmpty)
+	}
+
+	// Test case 3: Test with a slice containing elements with the same key
+	duplicatePeople := []Person{
+		{ID: 1, Name: "Alice"},
+		{ID: 1, Name: "Bob"},
+	}
+
+	expectedDuplicate := map[int]Person{
+		1: {ID: 1, Name: "Bob"}, // The last occurrence of the duplicate key will overwrite the previous one
+	}
+
+	resultDuplicate := SliceToMap(duplicatePeople, keyFunc)
+
+	if !reflect.DeepEqual(resultDuplicate, expectedDuplicate) {
+		t.Errorf("Test case 3 failed. Expected %v, got %v", expectedDuplicate, resultDuplicate)
+	}
+}