Last time I checked, `iterable` was useless as it's designed to work only in
templates.
Native iterators in Nim don't compose without macro-trickery, such as
zero_functional. Actually, the only good thing I can say about them is when
they _do_ work, they are as fast as loops (which they are).
import std/[tables]
import pkg/zero_functional
# A mapping from coordinates (x, y) to values.
var locations = {(1, 2): 1, (2, 1): 2, (-2, 5): 3}.toTable()
# Get the minimum X coordinate.
echo locations.keys --> map(it[0]).min()
# -2
Run
