创建一个具体类型的切片并转换到其各自的接口

Question

在创建接口切片并将其启动为具体类型时遇到一些问题，任何帮助都会非常感激界面type MatrixElement interface {    GetValue() Element    GetCoordinate() Coordinate}具体实施type LocatableElement struct {    value datastructures.Element    coordinate datastructures.Coordinate}func (ele LocatableElement)GetValue() datastructures.Element {    return ele.value}func (ele LocatableElement)GetCoordinate() datastructures.Coordinate {    return ele.coordinate}func CreateLocatableElement(value datastructures.Element, coordinate datastructures.Coordinate) LocatableElement {    return LocatableElement{        value: value,        coordinate: coordinate,    }}将类型定义为切片type HorizontalMatrix [][]datastructures.MatrixElement创建新 HorizonatlMatrix 的实例func CreateHorizontalMatrix(rows int, columns int) HorizontalMatrix {    horzMatrix := make([][]matrix.LocatableElement, rows)    for i := 0; i < rows; i++ {        horzMatrix[i] = make([]matrix.LocatableElement, columns)    }    return horzMatrix;}cannot use horzMatrix (type [][]matrix.LocatableElement) as type HorizontalMatrix in return argument

Answer 1

尽管如此 ，您既不能强制转换[]ConcreteTypes([]Interfaces)也不能断言implements 。您应该定义容器[]Interfaces.([]ConcreteTypes)ConcreteTypesInterfaces

type Matrix interface{

    GetElem(abs, ord int) MatrixElement 

}

并满足它HorizontalMatrix或使矩阵作为[]接口

horzMatrix := make([][]matrix.MatrixElement, rows)

horzMatrix[i] = make([]matrix.MatrixElement, columns)

然后用具体类型填充它LocatableElement