如何从切片中删除最后一个元素？

Question

I've seen people say just create a new slice by appending the old one

*slc = append(*slc[:item], *slc[item+1:]...)

but what if you want to remove the last element in the slice?

If you try to replace i (the last element) with i+1, it returns an out of bounds error since there is no i+1.

Answer 1

You can use len() to find the length and re-slice using the index before the last element:

if len(slice) > 0 {
    slice = slice[:len(slice)-1]
}

<kbd>Click here to see it in the playground</kbd>