go 报 need type assertion】的更多相关文章

responese_total := m["responses"].([]interface{})[0].(map[string]interface{})["hits"].(map[string]interface{})["total"] value, ok := responese_total.(string) if ok { fmt.Println(value) }…
7.2 Go type assertion 类型断言是使用在接口值上的操作. 语法x.(T)被称为类型断言,x代表接口的类型,T代表一个类型检查. 类型断言检查它操作对象的动态类型是否和断言类型匹配. 类型断言快速入门 package main import ( "fmt" ) type Point struct { x int y int } func main() { var a interface{} var point Point = Point{1, 2} //任何类型都实现…
最近在实现golang,看到个go的特性语法: typeswitch guard. typeswitch guard语法如下: package main import "fmt" func typeChecking(p interface{}) { switch p.(type) { case int: fmt.Print("int") case float64: fmt.Printf("float64") } } func main(){ ty…
TypeScript & as & Type Assertion Type Assertion (as) That is not vanilla JavaScript, it is TypeScript. As any means consider the typed object as a plain untyped javascript object. The as keyword is a Type Assertion in TypeScript which tells the co…
报错如下图所示: 报错原因:把String 强行转换成FormFile,所以才会抛出argument type mismatch.经查询:表单(html:form)中enctype="multipart/form-data"的意思,是设置表单的 MIME编码,默认情况,这个编码格式是application/x-www-form-urlencoded,不能用于文件上传:只有使用了 multipart/form-data,才能增加传递文件数据的功能. 解决办法:在form标签里加入enct…
问题: 1.在vue项目中,build打包后,index页面打开会报错, MIME type ('text/html') ;报错内容:because its MIME type ('text/html') is not a supported stylesheet MIME type2.控制台报错:报错内容:http://127.0.0.1:5500/static/css/app.04f46711e76646577281177c721d6432.css 这个地址Cannot GET 解决思路:…
vue报错    [Vue warn]: Invalid prop: type check failed for prop "name". Expected String with value "4", got Number with value 4. 当出现这个错误原因在于写法上漏了数字和字符串的类型关系 引用了我们定义的数组和变量或者函数 这个问题就是我们点击:name默认的类型是字符串类型,而我们自己定义的是数字类型所以我们需要改一下就好 希望上述能帮到你…
报错: Exception in thread "main" org.apache.ibatis.binding.BindingException: Type interface com.ssm.mapper.NewProductMapper is not known to the MapperRegistry. at org.apache.ibatis.binding.MapperRegistry.getMapper(MapperRegistry.java:47) at org.ap…
AFNetWorking[:] *** Assertion failure -- :::] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid parameter not satisfying: URLString' 解决 NSString *url = @"http://c.m.163.com/nc/article/headline/T1348647…
解决步骤: 1.输入root密码 2.看是哪个盘报的错,我这边是sda3(可能会是不同的盘),就是代码中标为FAIL 输入以下命令fsck -y /dev/sda3…