@MaineTim: Yup, new to Nim...
In the following, I've shortened your code just to show the essentials:
type
TSeg = object
sub: seq[int]
var seg = TSeg(sub: @[])
var segments = newSeq[TSeg]()
for i in 0 .. 2: segments.add seg
segments.echo
segments[2].sub.add(7)
segments.add(TSeg(sub: @[42]))
segments.echo
Run
No need to create the seq's using capacities (unless you are optimizing),
creating all the elements from your uninitialized model of segment doesn't
actually create any sub sequences as the default values are all zeros,
including the deductions sub field, so you can't assign or add to it until it
has been created with some sort of a new. In my example code, I initialized the
model seg including initializing its seq contents with seq literal initializer
as in @[] but you could use any sort of newSeq or newSeqOfCap, then either
assign to the existing elements or add to the elements as you wish as I have
done here.
