其实any就是interface{}别名，go标准库默认使用any替换之前的interface{} 一个常见泛型示例 func printT[...
AI代码解释 packagemainimport("fmt")// 接口的定义type CircleInterfaceinterface{area()float64}// 接口的使用funccalcArea(c CircleInterface)float64{returnc.area()}funcmain(){// init: 初始化内部的字段(是用了字段的顺序)c4:=CircleStruct{0,0,5}// 调用接口的方法fmt.Println(calcArea(&c4))}...
go官方文档用一段简单的话,清晰明了的介绍了defer的特点: Each time a "defer" statement executes, the function value and parameters to the call are evaluated as usual and saved anew but the actual function is not invoked. Instead, deferred functions are invoked immediately before the surrounding fu...
Go中的interface类型是不能直接转换成其他类型的,需要使用到断言 复制代码 packagemainfuncmain(){varitfinterface{} =1i, ok := itf.(string)println("值:", i,"; 断言结果", ok) j, ok := itf.(int)println("值:", j,"; 断言结果", ok) } 输出为: 复制代码 值: ; 断言结果 false 值: 1 ...
[golang] 概念: struct vs interface struct vs interface go语言的简化哲学: class = struct + receiver method set 注意: go 语言的struct,在参数传递中,是值拷贝。 struct 的代码示例 packagemainimport("fmt""math")typeCircleStructstruct{ xfloat64yfloat64rfloat64}// 使用 receiver 来定义 CircleStruct...
这里也有一个any类型：// any is an alias forinterface{}and is equivalent to interface{} in all...
// SelectStatement any SELECT statement.type SelectStatement interface { iSelectStatement() iStatement() iInsertRows() AddOrder(*Order) SetLimit(*Limit) SQLNode}func (*Select) iSelectStatement() {}func (*Union) iSelectStatement() {}func (*ParenSelect) iSelectStatement() {}所有模型都是...
Factory Pattern Object Pool Pattern Prototype Pattern Singleton Pattern Behavioral Chain of Responsibility Design Pattern Command Design Pattern Iterator Design Pattern Mediator Design Pattern Memento Design Pattern Null Object Design Pattern Observer Design Pattern ...
break default func interface select case defer go map struct chan else goto package switch const fallthrough if range type continue for import return var 注释 Python # 单行注释 ''' 多行注释 多行注释 ''' """ 多行注释 多行注释 """ ...
// SelectStatement any SELECT statement. type SelectStatement interface { iSelectStatement() iStatement() iInsertRows() AddOrder(*Order) SetLimit(*Limit) SQLNode } func (*Select) iSelectStatement() {} func (*Union) iSelectStatement() {} func (*ParenSelect) iSelectStatement() {} ...