遍历切片并重置索引-Golang

Question

I am iterating through a slice in golang and picking off elements one by one. The problem I am having is that after I remove an item I should either reset the index or start from the beginning but I'm not sure how.

package main

import (
    "fmt"
)

func main() {
    x := []int{1, 2, 3, 7, 16, 22, 17, 42}
    fmt.Println("We will start out with", x)

    for i, v := range x {
        fmt.Println("The current value is", v)
        x = append(x[:i], x[i+1:]...)
        fmt.Println("And after it is removed, we get", x)
    }
}

Will Return the following:

We will start out with [1 2 3 7 16 22 17 42]
The current value is 1
And after it is removed, we get [2 3 7 16 22 17 42]
The current value is 3
And after it is removed, we get [2 7 16 22 17 42]
The current value is 16
And after it is removed, we get [2 7 22 17 42]
The current value is 17
And after it is removed, we get [2 7 22 42]
The current value is 42
panic: runtime error: slice bounds out of range

goroutine 1 [running]:
main.main()
    /tmp/sandbox337422483/main.go:13 +0x460

What is the idiomatic way to do this? I immediately thing i-- or i = i-1 coming from Python.

Answer 1

I personally prefer to create a copy. But also it can be done without if you change range part:

package main

import (
    "fmt"
)

func main() {
    x := []int{1, 2, 3, 7, 16, 22, 17, 42}
    fmt.Println("We will start out with", x)

    for i := 0; i < len(x);  {
        fmt.Println("The current value is", x[i])
        x = append(x[:i], x[i+1:]...)
        fmt.Println("And after it is removed, we get", x)
    }
}