What is the most natural way to filter an array by index in Julia? The simplest example would be to leave off the kth element:

```
A = [1,2,3,4,5,6,7,8]
k = 4

[getindex(A, i) for i = 1:8 if i != k]

```

The above works but seems verbose compared to the simple `A[-k]` available in `R`. What's the cleanest way to perform this simple task?