fix: fix issue #275

compare/compare_internal.go

@@ -37,7 +37,8 @@ func compareRefValue(operator string, leftObj, rightObj interface{}, kind reflec
 	case reflect.Struct:
 
 		// compare time
-		if leftVal.CanConvert(timeType) {
+		// fix: issue #275
+		if canConvert(leftObj, timeType) {
 			timeObj1, ok := leftObj.(time.Time)
 			if !ok {
 				timeObj1 = leftVal.Convert(timeType).Interface().(time.Time)
@@ -59,7 +60,7 @@ func compareRefValue(operator string, leftObj, rightObj interface{}, kind reflec
 
 	case reflect.Slice:
 		// compare []byte
-		if leftVal.CanConvert(bytesType) {
+		if canConvert(leftObj, bytesType) {
 			bytesObj1, ok := leftObj.([]byte)
 			if !ok {
 				bytesObj1 = leftVal.Convert(bytesType).Interface().([]byte)
@@ -282,3 +283,15 @@ func compareBools(operator string, left, right bool) bool {
 	}
 	return false
 }
+
+// canConvert checks if the value can be converted to the target type
+func canConvert(value interface{}, targetType reflect.Type) bool {
+	v := reflect.ValueOf(value)
+
+	defer func() {
+		if r := recover(); r != nil {
+		}
+	}()
+	v.Convert(targetType)
+	return true
+}

convertor/convertor_internal.go

@@ -240,7 +240,8 @@ func setStructField(structObj interface{}, fieldName string, fieldValue interfac
 
 	if fieldVal.Type() != val.Type() {
 
-		if val.CanConvert(fieldVal.Type()) {
+		// fix: issue #275
+		if canConvert(fieldValue, fieldVal.Type()) {
 			fieldVal.Set(val.Convert(fieldVal.Type()))
 			return nil
 		}
@@ -284,3 +285,14 @@ func getFieldNameByJsonTag(structObj interface{}, jsonTag string) string {
 
 	return ""
 }
+
+func canConvert(value interface{}, targetType reflect.Type) bool {
+	v := reflect.ValueOf(value)
+
+	defer func() {
+		if r := recover(); r != nil {
+		}
+	}()
+	v.Convert(targetType)
+	return true
+}

docs/strutil.md

@@ -66,6 +66,7 @@ import (
 -   [Rotate](#Rotate)
 -   [TemplateReplace](#TemplateReplace)
 -   [RegexMatchAllGroups](#RegexMatchAllGroups)
+-   [Cut](#Cut)
 
 <div STYLE="page-break-after: always;"></div>
 
@@ -1537,4 +1538,38 @@ func main() {
     // [john.doe@example.com john.doe example com]
     // [jane.doe@example.com jane.doe example com]
 }
+```
+
+### <span id="Cut">Cut</span>
+
+<p>Splits the string at the first occurrence of separator.</p>
+
+<b>Signature:</b>
+
+```go
+func Cut(str, sep string) (before, after string, found bool)
+```
+
+<b>example:</b>
+
+```go
+import (
+    "fmt"
+    "github.com/duke-git/lancet/strutil"
+)
+
+func main() {
+    str := "hello-world"
+
+    before, after, found := strutil.Cut("hello-world", "-")
+
+    fmt.Println(before)
+    fmt.Println(after)
+    fmt.Println(found)
+
+    // Output:
+    // hello
+    // world
+    // true
+}
 ```

docs/strutil_zh-CN.md

@@ -66,6 +66,7 @@ import (
 -   [Rotate](#Rotate)
 -   [TemplateReplace](#TemplateReplace)
 -   [RegexMatchAllGroups](#RegexMatchAllGroups)
+-   [Cut](#Cut)
 
 
 <div STYLE="page-break-after: always;"></div>
@@ -1572,4 +1573,37 @@ func main() {
     // [john.doe@example.com john.doe example com]
     // [jane.doe@example.com jane.doe example com]
 }
-```
+```
+
+### <span id="Cut">Cut</span>
+
+<p>分割字符串。</p>
+
+<b>函数签名:</b>
+
+```go
+func Cut(str, sep string) (before, after string, found bool)
+```
+
+<b>示例:</b>
+
+```go
+import (
+    "fmt"
+    "github.com/duke-git/lancet/strutil"
+)
+
+func main() {
+    str := "hello-world"
+
+    before, after, found := strutil.Cut("hello-world", "-")
+
+    fmt.Println(before)
+    fmt.Println(after)
+    fmt.Println(found)
+
+    // Output:
+    // hello
+    // world
+    // true
+}

strutil/string.go

@@ -535,15 +535,22 @@ func RemoveWhiteSpace(str string, repalceAll bool) string {
 
 // SubInBetween return substring between the start and end position(excluded) of source string.
 func SubInBetween(str string, start string, end string) string {
-	if _, after, ok := strings.Cut(str, start); ok {
-		if before, _, ok := strings.Cut(after, end); ok {
+	if _, after, ok := Cut(str, start); ok {
+		if before, _, ok := Cut(after, end); ok {
 			return before
 		}
 	}
-
 	return ""
 }
 
+// Cut splits the string at the first occurrence of separator.
+func Cut(str, sep string) (before, after string, found bool) {
+	if i := strings.Index(str, sep); i >= 0 {
+		return str[:i], str[i+len(sep):], true
+	}
+	return str, "", false
+}
+
 // HammingDistance calculates the Hamming distance between two strings.
 // The Hamming distance is the number of positions at which the corresponding symbols are different.
 // This func returns an error if the input strings are of unequal lengths.

strutil/string_test.go

@@ -668,3 +668,77 @@ func TestRegexMatchAllGroups(t *testing.T) {
 		assert.Equal(tt.expected, result)
 	}
 }
+
+func TestCut(t *testing.T) {
+	t.Parallel()
+
+	assert := internal.NewAssert(t, "TestCut")
+
+	tests := []struct {
+		name   string
+		s      string
+		sep    string
+		before string
+		after  string
+		found  bool
+	}{
+		{
+			name:   "test with separator",
+			s:      "hello-world",
+			sep:    "-",
+			before: "hello",
+			after:  "world",
+			found:  true,
+		},
+		{
+			name:   "test without separator",
+			s:      "helloworld",
+			sep:    "-",
+			before: "helloworld",
+			after:  "",
+			found:  false,
+		},
+		{
+			name:   "test empty string",
+			s:      "",
+			sep:    "-",
+			before: "",
+			after:  "",
+			found:  false,
+		},
+		{
+			name:   "test separator at the beginning",
+			s:      "-hello",
+			sep:    "-",
+			before: "",
+			after:  "hello",
+			found:  true,
+		},
+		{
+			name:   "test separator at the end",
+			s:      "hello-",
+			sep:    "-",
+			before: "hello",
+			after:  "",
+			found:  true,
+		},
+		{
+			name:   "test multiple separators",
+			s:      "a-b-c-d",
+			sep:    "-",
+			before: "a",
+			after:  "b-c-d",
+			found:  true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			before, after, found := Cut(tt.s, tt.sep)
+			assert.Equal(tt.before, before)
+			assert.Equal(tt.after, after)
+			assert.Equal(tt.found, found)
+		})
+	}
+
+}