在golang中定义一个返回可变大小切片的函数

Question

I would like to build a function that returns a slice of any size. I know I can do

func BuildSlice() [100]int { return [100]int{} }

but I would like to be able to return slices of different sizes from the same function. Something like:

func BuildSlice(int size) [...]int { return [size]int{} }

I've tried the above as well as

func BuildSlice(size int) []int { return [size]int{} }

Please point me in the right direction.

Thanks.

Answer 1

First of all, slices are already of "variable size": [100]int and [...]int are array type definitions.

[]int is the correct syntax for a slice, and you could implement the function as:

func BuildSlice(size int) []int {
    return make([]int, size)
}

This will return a slice of zero values with the desired size, similar to what your array version does.