Go：比较两个切片并删除多个索引

Question

如何根据比较遍历两个切片并删除多个索引？我尝试了以下操作，但会导致错误 "panic: runtime error: slice bounds out of range."

package main

import (
    "fmt"
)

func main() {
    type My struct {
        SomeVal string
    }

    type Other struct {
        OtherVal string
    }

    var MySlice []My
    var OtherSlice []Other

    MySlice = append(MySlice, My{SomeVal: "abc"})
    MySlice = append(MySlice, My{SomeVal: "mno"})
    MySlice = append(MySlice, My{SomeVal: "xyz"})

    OtherSlice = append(OtherSlice, Other{OtherVal: "abc"})
    OtherSlice = append(OtherSlice, Other{OtherVal: "def"})
    OtherSlice = append(OtherSlice, Other{OtherVal: "xyz"})

    for i, a := range MySlice {
        for _, oa := range OtherSlice {
            if a.SomeVal == oa.OtherVal {
                MySlice = MySlice[:i+copy(MySlice[i:], MySlice[i+1:])]
            }
        }
    }

    fmt.Println(MySlice)
}

http://play.golang.org/p/4pgxE3LNmx

注意：如果只找到一个匹配项，则以上方法有效。当找到两个匹配项时会发生错误。

Answer 1

好吧，事情就是这样，一旦从切片中删除了一个索引，其余索引就会移动位置，从而使循环计数停止。通过递减循环计数变量解决了该问题。

for i := 0; i < len(MySlice); i++ {
    for _, oa := range OtherSlice {
        if MySlice[i].SomeVal == oa.OtherVal {
                MySlice = append(MySlice[:i], MySlice[i+1:]...)
                i--
                break
        }
    }
}

Go：比较两个切片并删除多个索引

Go: compare two slices and delete multiple indices

loops

compare

go

slice