> how do I get a pointer to its items
Well you did it the right and common way in your first post:
socket.send(addr data[0], data.len)
Run
When we have var s1: seq[T] then addr(s1[0]) is the address of the first
element. But as I told you, the dereference s1[0] may fail when the seq is
uninitialized, as it is a nil deref.
proc main =
var s1: seq[int]
var s2 = newSeq[int]()
echo cast[int](s1)
echo cast[int](s2)
var a: ptr int = addr(s1[0])
main()
Run
$ ./t
0
140675632484432
/tmp/t.nim(10) t
/tmp/t.nim(8) main
/home/salewski/Nim/lib/system/fatal.nim(49) sysFatal
Error: unhandled exception: index out of bounds, the container is empty
[IndexDefect]
Run
And indeed we get the same error for s2, so you have to test for len == 0
before using subscript operator [].
