feat: 新增MaxLen，获取字符串列表的最大长度

README.md

@@ -49,6 +49,7 @@
   - IsBlank 判断字符串是否为空白，或者由空白字符（空格、跳格、回车、换行等）组成。
   - IsNotBlank 判断字符串是否不为空，或者不为空白，IsBlank的反逻辑。
   - IsBlankChar 判断字符是否为空白字符。
+  - MaxLen 获取字符串列表中的最大长度。
 - [x] 本地缓存相关操作
   - Set 设置缓存项，支持仅设置缓存，也支持同时给缓存添加一个过期时间。
   - Get 获得缓存内容。

str.go

@@ -262,10 +262,21 @@ func IsNotBlank(s string) bool {
 // isBlankChar 判断字符是否为空白字符
 func isBlankChar(c rune) bool {
 	return unicode.IsSpace(c) ||
-		c == '\ufeff' ||
-		c == '\u202a' ||
-		c == '\u0000' ||
-		c == '\u3164' ||
-		c == '\u2800' ||
-		c == '\u180e'
+		c == '\ufeff' || // 字节次序标记字符
+		c == '\u202a' || // 右到左标记
+		c == '\u0000' || // 空字符
+		c == '\u3164' || // 零宽度非连接符
+		c == '\u2800' || // 零宽度空间
+		c == '\u180e' // 蒙古文格式化字符
+}
+
+// MaxLen 获取字符串列表中最大长度
+func MaxLen(strList ...string) int {
+	maxLen := 0
+	for _, str := range strList {
+		if len(str) > maxLen {
+			maxLen = len(str)
+		}
+	}
+	return maxLen
 }

str_test.go

@@ -494,3 +494,29 @@ func TestIsNotBlank(t *testing.T) {
 		}
 	}
 }
+
+func TestMaxLen(t *testing.T) {
+	type args struct {
+		ss []string
+	}
+	tests := []struct {
+		name string
+		args args
+		want int
+	}{
+		{name: "zero-1", args: args{ss: []string{}}, want: 0},
+		{name: "zero-2", args: args{ss: []string{""}}, want: 0},
+		{name: "zero-3", args: args{ss: []string{"", ""}}, want: 0},
+		{name: "one", args: args{ss: []string{"hello", "world"}}, want: 5},
+		{name: "two", args: args{ss: []string{"hello", "world", "hello world"}}, want: 11},
+		{name: "three", args: args{ss: []string{"hello", "world", "hello world", "hello world hello world"}}, want: 23},
+		{name: "four", args: args{ss: []string{"hello", "world", "hello world", "hello world hello world", "hello world hello world hello world"}}, want: 35},
+		{name: "five", args: args{ss: []string{"hello", "world", "hello world", "hello world hello world", "hello world hello world hello world", "hello world hello world hello world hello world"}}, want: 47},
+	}
+	for _, test := range tests {
+		actual := MaxLen(test.args.ss...)
+		if actual != test.want {
+			t.Errorf("预期 %v，实际值：%v", test.want, actual)
+		}
+	}
+}