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lambdaxs

一个 GO 语言的疑问,初学勿喷

  •  
  •   lambdaxs Feb 28, 2018 3536 views
    This topic created in 2980 days ago, the information mentioned may be changed or developed.

    GO 语言

    //可以进行赋值 var a interface{} var b int a = b //a = b 编译器报错 var a []interface{} var b []int a = b 

    为什么 interface 类型的切片就没法直接转换赋值?

    12 replies    2018-02-28 19:05:18 +08:00
    lambdaxs
        1
    lambdaxs  
    OP
       Feb 28, 2018
    顶一哈! d=====( ̄ ̄*)b
    brickyang
        2
    brickyang  
       Feb 28, 2018   1
    切片的底层是数组,这样相当于把两个不同类型的数组进行赋值

    https://blog.go-zh.org/go-slices-usage-and-internals
    zhs227
        3
    zhs227  
       Feb 28, 2018   1
    这是数组赋值 ,不是接口转换。
    Shadas
        4
    Shadas  
       Feb 28, 2018   1
    lambdaxs
        5
    lambdaxs  
    OP
       Feb 28, 2018
    @brickyang get 应该写成 var a interface{}; var b []int ;a = b;
    lambdaxs
        6
    lambdaxs  
    OP
       Feb 28, 2018
    @Shadas get
    是可以写成这样
    a := []int{1,2,3}
    b := make([]interface{}, len(a))
    for i, d := range a {
    b[i] = a
    }
    Michaelssss
        7
    Michaelssss  
       Feb 28, 2018
    ....你这不是 Go 初学。。。你是 C 都没学。。。


    =是赋值,你的切片都不是值只是一个 symbol,你怎么赋值。。。
    flyzero
        8
    flyzero  
       Feb 28, 2018
    @Michaelssss 看你头像和我 boss 一样,逃
    pmispig
        9
    pmispig  
       Feb 28, 2018
    var a interface{}
    var b []int
    a = b
    这样可以
    lambdaxs
        10
    lambdaxs  
    OP
       Feb 28, 2018
    @Michaelssss
    var a []int
    var b []int
    a = b
    是可以的
    lambdaxs
        11
    lambdaxs  
    OP
       Feb 28, 2018
    @Michaelssss

    var a []int
    var b []int
    a = b
    是可以的
    douglarek
        12
    douglarek  
       Feb 28, 2018
    第一种 int 是 interface{} 第二种是不同的 slice,类型不同而且不存在父子关系
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